./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_traffic_light_example.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_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/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_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_traffic_light_example.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/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_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/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 86f9a9405675d4b21cb240ccea7622953d206e12e477e20eacb84951191b2db2 --- 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 04:03:45,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:03:45,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:03:45,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:03:45,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:03:45,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:03:45,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:03:45,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:03:45,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:03:45,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:03:45,567 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:03:45,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:03:45,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:03:45,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:03:45,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:03:45,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:03:45,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:03:45,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:03:45,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:03:45,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:03:45,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:03:45,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:03:45,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:03:45,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:03:45,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:03:45,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:03:45,591 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:03:45,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:03:45,593 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:03:45,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:03:45,594 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:03:45,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:03:45,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:03:45,596 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:03:45,597 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:03:45,610 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:03:45,610 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:03:45,611 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:03:45,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:03:45,612 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:03:45,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:03:45,615 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 04:03:45,650 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:03:45,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:03:45,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:03:45,651 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:03:45,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:03:45,652 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:03:45,652 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:03:45,652 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:03:45,652 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:03:45,653 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:03:45,653 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:03:45,653 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:03:45,653 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:03:45,653 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:03:45,653 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:03:45,654 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:03:45,658 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:03:45,658 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:03:45,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:03:45,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:03:45,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:03:45,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:03:45,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:03:45,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:03:45,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:03:45,660 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:03:45,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:03:45,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:03:45,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:03:45,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:03:45,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:03:45,662 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:03:45,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:03:45,663 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:03:45,663 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:03:45,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:03:45,664 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:03:45,664 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:03:45,664 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_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86f9a9405675d4b21cb240ccea7622953d206e12e477e20eacb84951191b2db2 [2022-11-03 04:03:46,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:03:46,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:03:46,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:03:46,042 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:03:46,043 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:03:46,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_traffic_light_example.c [2022-11-03 04:03:46,116 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/data/7b7229ed3/9751018abc0b4daa88a75df4527f3440/FLAG1d9258fc6 [2022-11-03 04:03:46,675 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:03:46,676 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_traffic_light_example.c [2022-11-03 04:03:46,684 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/data/7b7229ed3/9751018abc0b4daa88a75df4527f3440/FLAG1d9258fc6 [2022-11-03 04:03:47,009 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/data/7b7229ed3/9751018abc0b4daa88a75df4527f3440 [2022-11-03 04:03:47,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:03:47,013 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:03:47,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:03:47,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:03:47,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:03:47,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:03:47" (1/1) ... [2022-11-03 04:03:47,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e90c352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:47, skipping insertion in model container [2022-11-03 04:03:47,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:03:47" (1/1) ... [2022-11-03 04:03:47,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:03:47,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:03:47,234 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_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_traffic_light_example.c[1107,1120] [2022-11-03 04:03:47,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:03:47,302 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:03:47,313 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_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_traffic_light_example.c[1107,1120] [2022-11-03 04:03:47,351 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:03:47,363 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:03:47,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:47 WrapperNode [2022-11-03 04:03:47,364 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:03:47,365 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:03:47,365 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:03:47,365 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:03:47,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:47" (1/1) ... [2022-11-03 04:03:47,389 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:47" (1/1) ... [2022-11-03 04:03:47,438 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 236 [2022-11-03 04:03:47,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:03:47,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:03:47,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:03:47,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:03:47,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:47" (1/1) ... [2022-11-03 04:03:47,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:47" (1/1) ... [2022-11-03 04:03:47,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:47" (1/1) ... [2022-11-03 04:03:47,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:47" (1/1) ... [2022-11-03 04:03:47,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:47" (1/1) ... [2022-11-03 04:03:47,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:47" (1/1) ... [2022-11-03 04:03:47,510 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:47" (1/1) ... [2022-11-03 04:03:47,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:47" (1/1) ... [2022-11-03 04:03:47,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:03:47,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:03:47,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:03:47,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:03:47,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:47" (1/1) ... [2022-11-03 04:03:47,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:03:47,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:47,552 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:03:47,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:03:47,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:03:47,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:03:47,695 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:03:47,697 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:03:48,133 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:03:48,404 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:03:48,404 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 04:03:48,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:03:48 BoogieIcfgContainer [2022-11-03 04:03:48,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:03:48,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:03:48,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:03:48,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:03:48,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:03:47" (1/3) ... [2022-11-03 04:03:48,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf2fd9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:03:48, skipping insertion in model container [2022-11-03 04:03:48,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:47" (2/3) ... [2022-11-03 04:03:48,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf2fd9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:03:48, skipping insertion in model container [2022-11-03 04:03:48,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:03:48" (3/3) ... [2022-11-03 04:03:48,417 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_traffic_light_example.c [2022-11-03 04:03:48,436 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:03:48,436 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:03:48,485 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:03:48,492 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;@2d366b9f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:03:48,493 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:03:48,497 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 04:03:48,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 04:03:48,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:48,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 04:03:48,505 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:48,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:48,510 INFO L85 PathProgramCache]: Analyzing trace with hash 4746797, now seen corresponding path program 1 times [2022-11-03 04:03:48,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:03:48,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575108516] [2022-11-03 04:03:48,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:48,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:03:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 04:03:48,666 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 04:03:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 04:03:48,779 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 04:03:48,781 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 04:03:48,783 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 04:03:48,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:03:48,791 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 04:03:48,794 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 04:03:48,813 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 04:03:48,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 04:03:48 BoogieIcfgContainer [2022-11-03 04:03:48,827 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 04:03:48,830 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 04:03:48,830 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 04:03:48,831 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 04:03:48,832 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:03:48" (3/4) ... [2022-11-03 04:03:48,835 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 04:03:48,835 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 04:03:48,838 INFO L158 Benchmark]: Toolchain (without parser) took 1824.35ms. Allocated memory is still 125.8MB. Free memory was 85.9MB in the beginning and 95.6MB in the end (delta: -9.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 04:03:48,840 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 125.8MB. Free memory was 102.9MB in the beginning and 102.8MB in the end (delta: 75.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 04:03:48,841 INFO L158 Benchmark]: CACSL2BoogieTranslator took 349.22ms. Allocated memory is still 125.8MB. Free memory was 85.6MB in the beginning and 96.9MB in the end (delta: -11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 04:03:48,842 INFO L158 Benchmark]: Boogie Procedure Inliner took 85.62ms. Allocated memory is still 125.8MB. Free memory was 96.9MB in the beginning and 93.7MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 04:03:48,843 INFO L158 Benchmark]: Boogie Preprocessor took 64.77ms. Allocated memory is still 125.8MB. Free memory was 93.7MB in the beginning and 91.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 04:03:48,843 INFO L158 Benchmark]: RCFGBuilder took 890.80ms. Allocated memory is still 125.8MB. Free memory was 91.6MB in the beginning and 67.3MB in the end (delta: 24.3MB). Peak memory consumption was 50.6MB. Max. memory is 16.1GB. [2022-11-03 04:03:48,844 INFO L158 Benchmark]: TraceAbstraction took 417.93ms. Allocated memory is still 125.8MB. Free memory was 66.1MB in the beginning and 95.6MB in the end (delta: -29.5MB). Peak memory consumption was 25.4MB. Max. memory is 16.1GB. [2022-11-03 04:03:48,844 INFO L158 Benchmark]: Witness Printer took 6.44ms. Allocated memory is still 125.8MB. Free memory is still 95.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 04:03:48,847 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 125.8MB. Free memory was 102.9MB in the beginning and 102.8MB in the end (delta: 75.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 349.22ms. Allocated memory is still 125.8MB. Free memory was 85.6MB in the beginning and 96.9MB in the end (delta: -11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 85.62ms. Allocated memory is still 125.8MB. Free memory was 96.9MB in the beginning and 93.7MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 64.77ms. Allocated memory is still 125.8MB. Free memory was 93.7MB in the beginning and 91.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 890.80ms. Allocated memory is still 125.8MB. Free memory was 91.6MB in the beginning and 67.3MB in the end (delta: 24.3MB). Peak memory consumption was 50.6MB. Max. memory is 16.1GB. * TraceAbstraction took 417.93ms. Allocated memory is still 125.8MB. Free memory was 66.1MB in the beginning and 95.6MB in the end (delta: -29.5MB). Peak memory consumption was 25.4MB. Max. memory is 16.1GB. * Witness Printer took 6.44ms. Allocated memory is still 125.8MB. Free memory is still 95.6MB. 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 71, overapproximation of bitwiseAnd at line 64. 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_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 8); [L29] const SORT_4 msb_SORT_4 = (SORT_4)1 << (8 - 1); [L31] const SORT_16 mask_SORT_16 = (SORT_16)-1 >> (sizeof(SORT_16) * 8 - 2); [L32] const SORT_16 msb_SORT_16 = (SORT_16)1 << (2 - 1); [L34] const SORT_44 mask_SORT_44 = (SORT_44)-1 >> (sizeof(SORT_44) * 8 - 32); [L35] const SORT_44 msb_SORT_44 = (SORT_44)1 << (32 - 1); [L37] const SORT_4 var_5 = 0; [L38] const SORT_4 var_8 = 255; [L39] const SORT_1 var_12 = 1; [L40] const SORT_16 var_17 = 0; [L41] const SORT_4 var_21 = 1; [L42] const SORT_4 var_23 = 63; [L43] const SORT_4 var_29 = 7; [L44] const SORT_16 var_35 = 2; [L45] const SORT_16 var_38 = 1; [L46] const SORT_44 var_45 = 0; [L47] const SORT_44 var_46 = 1; [L48] const SORT_44 var_52 = 2; [L50] SORT_1 input_2; [L51] SORT_1 input_3; [L53] SORT_4 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_4; [L54] SORT_16 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_16; [L56] SORT_4 init_7_arg_1 = var_5; [L57] state_6 = init_7_arg_1 [L58] SORT_16 init_19_arg_1 = var_17; [L59] state_18 = init_19_arg_1 VAL [init_19_arg_1=0, init_7_arg_1=0, mask_SORT_1=1, mask_SORT_16=3, mask_SORT_4=255, mask_SORT_44=4294967295, msb_SORT_1=1, msb_SORT_16=2, msb_SORT_4=128, msb_SORT_44=2147483648, state_18=0, state_6=0, var_12=1, var_17=0, var_21=1, var_23=63, var_29=7, var_35=2, var_38=1, var_45=0, var_46=1, var_5=0, var_52=2, var_8=255] [L62] input_2 = __VERIFIER_nondet_uchar() [L63] input_3 = __VERIFIER_nondet_uchar() [L64] input_3 = input_3 & mask_SORT_1 [L67] SORT_4 var_9_arg_0 = state_6; [L68] SORT_4 var_9_arg_1 = var_8; [L69] SORT_1 var_9 = var_9_arg_0 != var_9_arg_1; [L70] SORT_1 var_13_arg_0 = var_9; [L71] SORT_1 var_13 = ~var_13_arg_0; [L72] SORT_1 var_14_arg_0 = var_12; [L73] SORT_1 var_14_arg_1 = var_13; [L74] SORT_1 var_14 = var_14_arg_0 & var_14_arg_1; [L75] var_14 = var_14 & mask_SORT_1 [L76] SORT_1 bad_15_arg_0 = var_14; [L77] CALL __VERIFIER_assert(!(bad_15_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: 0.3s, 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, 0.1s 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 04:03:48,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/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_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_traffic_light_example.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/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_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/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 86f9a9405675d4b21cb240ccea7622953d206e12e477e20eacb84951191b2db2 --- 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 04:03:51,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:03:51,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:03:51,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:03:51,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:03:51,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:03:51,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:03:51,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:03:51,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:03:51,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:03:51,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:03:51,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:03:51,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:03:51,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:03:51,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:03:51,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:03:51,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:03:51,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:03:51,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:03:51,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:03:51,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:03:51,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:03:51,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:03:51,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:03:51,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:03:51,440 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:03:51,440 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:03:51,441 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:03:51,441 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:03:51,442 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:03:51,443 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:03:51,444 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:03:51,444 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:03:51,445 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:03:51,446 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:03:51,447 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:03:51,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:03:51,448 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:03:51,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:03:51,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:03:51,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:03:51,457 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 04:03:51,497 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:03:51,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:03:51,499 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:03:51,499 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:03:51,500 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:03:51,500 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:03:51,501 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:03:51,501 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:03:51,501 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:03:51,502 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:03:51,503 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:03:51,503 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:03:51,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:03:51,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:03:51,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:03:51,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:03:51,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:03:51,506 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 04:03:51,506 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 04:03:51,506 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 04:03:51,506 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:03:51,507 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:03:51,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:03:51,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:03:51,507 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 04:03:51,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:03:51,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:03:51,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:03:51,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:03:51,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:03:51,509 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 04:03:51,509 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:51,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:03:51,510 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:03:51,510 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 04:03:51,510 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_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86f9a9405675d4b21cb240ccea7622953d206e12e477e20eacb84951191b2db2 [2022-11-03 04:03:51,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:03:51,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:03:51,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:03:51,943 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:03:51,944 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:03:51,946 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_traffic_light_example.c [2022-11-03 04:03:52,029 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/data/2531e7ce5/de1b1f1a439d47ff8c8ce6b13267f790/FLAGd79ced877 [2022-11-03 04:03:52,515 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:03:52,515 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_traffic_light_example.c [2022-11-03 04:03:52,523 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/data/2531e7ce5/de1b1f1a439d47ff8c8ce6b13267f790/FLAGd79ced877 [2022-11-03 04:03:52,869 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/data/2531e7ce5/de1b1f1a439d47ff8c8ce6b13267f790 [2022-11-03 04:03:52,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:03:52,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:03:52,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:03:52,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:03:52,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:03:52,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:03:52" (1/1) ... [2022-11-03 04:03:52,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42ec004d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:52, skipping insertion in model container [2022-11-03 04:03:52,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:03:52" (1/1) ... [2022-11-03 04:03:52,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:03:52,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:03:53,125 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_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_traffic_light_example.c[1107,1120] [2022-11-03 04:03:53,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:03:53,220 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:03:53,240 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_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_traffic_light_example.c[1107,1120] [2022-11-03 04:03:53,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:03:53,308 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:03:53,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:53 WrapperNode [2022-11-03 04:03:53,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:03:53,319 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:03:53,320 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:03:53,320 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:03:53,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:53" (1/1) ... [2022-11-03 04:03:53,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:53" (1/1) ... [2022-11-03 04:03:53,371 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 236 [2022-11-03 04:03:53,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:03:53,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:03:53,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:03:53,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:03:53,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:53" (1/1) ... [2022-11-03 04:03:53,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:53" (1/1) ... [2022-11-03 04:03:53,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:53" (1/1) ... [2022-11-03 04:03:53,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:53" (1/1) ... [2022-11-03 04:03:53,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:53" (1/1) ... [2022-11-03 04:03:53,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:53" (1/1) ... [2022-11-03 04:03:53,400 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:53" (1/1) ... [2022-11-03 04:03:53,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:53" (1/1) ... [2022-11-03 04:03:53,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:03:53,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:03:53,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:03:53,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:03:53,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:53" (1/1) ... [2022-11-03 04:03:53,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:03:53,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:53,438 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:03:53,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:03:53,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:03:53,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:03:53,613 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:03:53,615 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:03:54,111 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:03:54,118 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:03:54,119 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 04:03:54,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:03:54 BoogieIcfgContainer [2022-11-03 04:03:54,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:03:54,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:03:54,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:03:54,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:03:54,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:03:52" (1/3) ... [2022-11-03 04:03:54,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ddee120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:03:54, skipping insertion in model container [2022-11-03 04:03:54,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:53" (2/3) ... [2022-11-03 04:03:54,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ddee120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:03:54, skipping insertion in model container [2022-11-03 04:03:54,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:03:54" (3/3) ... [2022-11-03 04:03:54,144 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_traffic_light_example.c [2022-11-03 04:03:54,164 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:03:54,165 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:03:54,216 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:03:54,223 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;@2ca6df90, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:03:54,224 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:03:54,228 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 38 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:54,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 04:03:54,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:54,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 04:03:54,236 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:54,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:54,241 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 04:03:54,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:54,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374727843] [2022-11-03 04:03:54,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:54,255 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:54,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:54,262 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:54,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 04:03:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:54,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:03:54,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:54,653 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 04:03:54,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:54,658 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:54,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374727843] [2022-11-03 04:03:54,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374727843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:54,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:03:54,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:03:54,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761564537] [2022-11-03 04:03:54,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:54,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:03:54,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:54,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:03:54,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:03:54,722 INFO L87 Difference]: Start difference. First operand has 39 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 38 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 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 04:03:54,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:54,872 INFO L93 Difference]: Finished difference Result 104 states and 156 transitions. [2022-11-03 04:03:54,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:03:54,875 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 04:03:54,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:54,888 INFO L225 Difference]: With dead ends: 104 [2022-11-03 04:03:54,889 INFO L226 Difference]: Without dead ends: 67 [2022-11-03 04:03:54,898 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 04:03:54,905 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 88 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:54,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 126 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:03:54,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-03 04:03:54,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 37. [2022-11-03 04:03:54,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:54,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2022-11-03 04:03:54,959 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 5 [2022-11-03 04:03:54,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:54,960 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2022-11-03 04:03:54,960 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 04:03:54,960 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2022-11-03 04:03:54,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 04:03:54,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:54,963 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] [2022-11-03 04:03:54,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:55,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:55,175 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:55,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:55,176 INFO L85 PathProgramCache]: Analyzing trace with hash 129006159, now seen corresponding path program 1 times [2022-11-03 04:03:55,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:55,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965024515] [2022-11-03 04:03:55,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:55,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:55,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:55,179 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:55,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 04:03:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:55,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:03:55,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:55,471 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 04:03:55,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:55,472 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:55,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965024515] [2022-11-03 04:03:55,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965024515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:55,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:03:55,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:03:55,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898771328] [2022-11-03 04:03:55,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:55,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:03:55,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:55,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:03:55,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:03:55,492 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:55,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:55,597 INFO L93 Difference]: Finished difference Result 106 states and 149 transitions. [2022-11-03 04:03:55,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:03:55,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 04:03:55,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:55,604 INFO L225 Difference]: With dead ends: 106 [2022-11-03 04:03:55,604 INFO L226 Difference]: Without dead ends: 73 [2022-11-03 04:03:55,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 04:03:55,608 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 84 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:55,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 126 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:03:55,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-03 04:03:55,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 41. [2022-11-03 04:03:55,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.4) internal successors, (56), 40 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:55,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 56 transitions. [2022-11-03 04:03:55,630 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 56 transitions. Word has length 36 [2022-11-03 04:03:55,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:55,630 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 56 transitions. [2022-11-03 04:03:55,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:55,632 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 56 transitions. [2022-11-03 04:03:55,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 04:03:55,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:55,634 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] [2022-11-03 04:03:55,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:55,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:55,851 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:55,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:55,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1257197235, now seen corresponding path program 1 times [2022-11-03 04:03:55,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:55,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149048321] [2022-11-03 04:03:55,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:55,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:55,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:55,854 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:55,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 04:03:55,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:55,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:03:55,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:56,037 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 04:03:56,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:56,038 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:56,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149048321] [2022-11-03 04:03:56,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149048321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:56,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:03:56,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:03:56,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340467822] [2022-11-03 04:03:56,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:56,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:03:56,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:56,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:03:56,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:03:56,041 INFO L87 Difference]: Start difference. First operand 41 states and 56 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:56,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:56,122 INFO L93 Difference]: Finished difference Result 136 states and 190 transitions. [2022-11-03 04:03:56,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:03:56,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 04:03:56,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:56,123 INFO L225 Difference]: With dead ends: 136 [2022-11-03 04:03:56,124 INFO L226 Difference]: Without dead ends: 103 [2022-11-03 04:03:56,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 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 04:03:56,125 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 165 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 249 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 04:03:56,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 249 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:03:56,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-03 04:03:56,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 43. [2022-11-03 04:03:56,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:56,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2022-11-03 04:03:56,133 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 36 [2022-11-03 04:03:56,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:56,133 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2022-11-03 04:03:56,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:56,134 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2022-11-03 04:03:56,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 04:03:56,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:56,135 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] [2022-11-03 04:03:56,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:56,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:56,346 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:56,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:56,347 INFO L85 PathProgramCache]: Analyzing trace with hash 666030799, now seen corresponding path program 1 times [2022-11-03 04:03:56,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:56,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312091090] [2022-11-03 04:03:56,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:56,349 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:56,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:56,350 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:56,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 04:03:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:56,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 04:03:56,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:56,638 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 04:03:56,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:56,639 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:56,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312091090] [2022-11-03 04:03:56,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312091090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:56,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:03:56,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:03:56,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786886833] [2022-11-03 04:03:56,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:56,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:03:56,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:56,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:03:56,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:03:56,647 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:56,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:56,769 INFO L93 Difference]: Finished difference Result 136 states and 189 transitions. [2022-11-03 04:03:56,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:03:56,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 04:03:56,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:56,770 INFO L225 Difference]: With dead ends: 136 [2022-11-03 04:03:56,771 INFO L226 Difference]: Without dead ends: 103 [2022-11-03 04:03:56,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:03:56,779 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 148 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 235 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 04:03:56,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 235 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:03:56,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-03 04:03:56,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 49. [2022-11-03 04:03:56,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.375) internal successors, (66), 48 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:56,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2022-11-03 04:03:56,798 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 36 [2022-11-03 04:03:56,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:56,798 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2022-11-03 04:03:56,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:56,799 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2022-11-03 04:03:56,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 04:03:56,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:56,800 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] [2022-11-03 04:03:56,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:57,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:57,014 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:57,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:57,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1088732625, now seen corresponding path program 1 times [2022-11-03 04:03:57,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:57,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44890096] [2022-11-03 04:03:57,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:57,017 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:57,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:57,019 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:57,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 04:03:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:57,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:03:57,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:57,257 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 04:03:57,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:57,258 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:57,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44890096] [2022-11-03 04:03:57,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44890096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:57,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:03:57,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:03:57,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456562821] [2022-11-03 04:03:57,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:57,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:03:57,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:57,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:03:57,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:03:57,260 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:57,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:57,329 INFO L93 Difference]: Finished difference Result 120 states and 167 transitions. [2022-11-03 04:03:57,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:03:57,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 04:03:57,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:57,330 INFO L225 Difference]: With dead ends: 120 [2022-11-03 04:03:57,331 INFO L226 Difference]: Without dead ends: 87 [2022-11-03 04:03:57,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 04:03:57,332 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 67 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:57,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 139 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:03:57,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-03 04:03:57,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 55. [2022-11-03 04:03:57,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:57,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2022-11-03 04:03:57,338 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 36 [2022-11-03 04:03:57,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:57,339 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2022-11-03 04:03:57,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:57,339 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2022-11-03 04:03:57,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 04:03:57,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:57,343 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] [2022-11-03 04:03:57,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:57,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:57,556 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:57,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:57,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1926370993, now seen corresponding path program 1 times [2022-11-03 04:03:57,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:57,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249556620] [2022-11-03 04:03:57,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:57,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:57,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:57,558 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:57,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 04:03:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:57,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:03:57,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:57,795 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 04:03:57,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:57,796 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:57,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249556620] [2022-11-03 04:03:57,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249556620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:57,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:03:57,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:03:57,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500863880] [2022-11-03 04:03:57,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:57,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:03:57,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:57,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:03:57,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:03:57,799 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:57,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:57,914 INFO L93 Difference]: Finished difference Result 150 states and 208 transitions. [2022-11-03 04:03:57,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:03:57,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 04:03:57,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:57,916 INFO L225 Difference]: With dead ends: 150 [2022-11-03 04:03:57,917 INFO L226 Difference]: Without dead ends: 117 [2022-11-03 04:03:57,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 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 04:03:57,921 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 148 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:57,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 244 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:03:57,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-03 04:03:57,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 57. [2022-11-03 04:03:57,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 56 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:57,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 76 transitions. [2022-11-03 04:03:57,944 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 76 transitions. Word has length 36 [2022-11-03 04:03:57,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:57,947 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 76 transitions. [2022-11-03 04:03:57,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:57,947 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 76 transitions. [2022-11-03 04:03:57,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 04:03:57,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:57,948 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] [2022-11-03 04:03:57,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:58,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:58,163 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:58,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:58,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1781790289, now seen corresponding path program 1 times [2022-11-03 04:03:58,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:58,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55721033] [2022-11-03 04:03:58,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:58,164 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:58,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:58,166 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:58,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 04:03:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:58,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 04:03:58,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:58,522 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 04:03:58,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:58,523 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:58,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55721033] [2022-11-03 04:03:58,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55721033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:58,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:03:58,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:03:58,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313528869] [2022-11-03 04:03:58,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:58,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:03:58,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:58,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:03:58,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:03:58,525 INFO L87 Difference]: Start difference. First operand 57 states and 76 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:58,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:58,616 INFO L93 Difference]: Finished difference Result 150 states and 207 transitions. [2022-11-03 04:03:58,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:03:58,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 04:03:58,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:58,618 INFO L225 Difference]: With dead ends: 150 [2022-11-03 04:03:58,618 INFO L226 Difference]: Without dead ends: 117 [2022-11-03 04:03:58,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 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 04:03:58,619 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 131 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 230 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 04:03:58,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 230 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:03:58,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-03 04:03:58,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 63. [2022-11-03 04:03:58,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 62 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:58,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 84 transitions. [2022-11-03 04:03:58,625 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 84 transitions. Word has length 36 [2022-11-03 04:03:58,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:58,625 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 84 transitions. [2022-11-03 04:03:58,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:58,626 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 84 transitions. [2022-11-03 04:03:58,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 04:03:58,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:58,627 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] [2022-11-03 04:03:58,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:58,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:58,839 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:58,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:58,840 INFO L85 PathProgramCache]: Analyzing trace with hash -738169645, now seen corresponding path program 1 times [2022-11-03 04:03:58,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:58,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720679402] [2022-11-03 04:03:58,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:58,841 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:58,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:58,843 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:58,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 04:03:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:58,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 04:03:58,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:59,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:00,153 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:00,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720679402] [2022-11-03 04:04:00,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720679402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:00,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [200564273] [2022-11-03 04:04:00,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:00,154 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:00,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:00,157 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:00,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-03 04:04:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:00,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 04:04:00,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:00,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:00,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:01,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [200564273] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:01,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508813738] [2022-11-03 04:04:01,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:01,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:01,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:04:01,042 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:04:01,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 04:04:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:01,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 04:04:01,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:01,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:02,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508813738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:02,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:04:02,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 10, 9] total 23 [2022-11-03 04:04:02,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404116333] [2022-11-03 04:04:02,280 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:04:02,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 04:04:02,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:02,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 04:04:02,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-11-03 04:04:02,283 INFO L87 Difference]: Start difference. First operand 63 states and 84 transitions. Second operand has 23 states, 23 states have (on average 4.608695652173913) internal successors, (106), 23 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:02,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:02,738 INFO L93 Difference]: Finished difference Result 138 states and 190 transitions. [2022-11-03 04:04:02,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:04:02,739 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.608695652173913) internal successors, (106), 23 states have internal predecessors, (106), 0 states have call successors, (0), 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 36 [2022-11-03 04:04:02,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:02,740 INFO L225 Difference]: With dead ends: 138 [2022-11-03 04:04:02,740 INFO L226 Difference]: Without dead ends: 136 [2022-11-03 04:04:02,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2022-11-03 04:04:02,741 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 607 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:02,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [607 Valid, 382 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 100 Invalid, 0 Unknown, 89 Unchecked, 0.1s Time] [2022-11-03 04:04:02,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-03 04:04:02,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 92. [2022-11-03 04:04:02,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.3516483516483517) internal successors, (123), 91 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:02,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 123 transitions. [2022-11-03 04:04:02,758 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 123 transitions. Word has length 36 [2022-11-03 04:04:02,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:02,760 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 123 transitions. [2022-11-03 04:04:02,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.608695652173913) internal successors, (106), 23 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:02,761 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 123 transitions. [2022-11-03 04:04:02,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 04:04:02,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:02,762 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] [2022-11-03 04:04:02,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:02,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:03,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:03,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:03,383 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:03,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:03,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1867853909, now seen corresponding path program 1 times [2022-11-03 04:04:03,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:03,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955506193] [2022-11-03 04:04:03,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:03,384 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:03,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:03,384 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:03,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 04:04:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:03,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:04:03,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:03,630 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 04:04:03,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:03,631 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:03,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955506193] [2022-11-03 04:04:03,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955506193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:03,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:03,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:04:03,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146115100] [2022-11-03 04:04:03,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:03,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:04:03,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:03,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:04:03,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:04:03,632 INFO L87 Difference]: Start difference. First operand 92 states and 123 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:03,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:03,679 INFO L93 Difference]: Finished difference Result 155 states and 208 transitions. [2022-11-03 04:04:03,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:04:03,680 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 04:04:03,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:03,681 INFO L225 Difference]: With dead ends: 155 [2022-11-03 04:04:03,681 INFO L226 Difference]: Without dead ends: 105 [2022-11-03 04:04:03,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:04:03,682 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 28 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:03,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 297 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2022-11-03 04:04:03,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-03 04:04:03,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 94. [2022-11-03 04:04:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.3440860215053763) internal successors, (125), 93 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:03,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2022-11-03 04:04:03,691 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 125 transitions. Word has length 36 [2022-11-03 04:04:03,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:03,691 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 125 transitions. [2022-11-03 04:04:03,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:03,692 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 125 transitions. [2022-11-03 04:04:03,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 04:04:03,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:03,697 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] [2022-11-03 04:04:03,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:03,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:04:03,914 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:03,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:03,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1869700951, now seen corresponding path program 1 times [2022-11-03 04:04:03,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:03,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999361600] [2022-11-03 04:04:03,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:03,915 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:03,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:03,916 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:03,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 04:04:04,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:04,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 04:04:04,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:04,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:05,804 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:05,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999361600] [2022-11-03 04:04:05,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999361600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:05,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [29417759] [2022-11-03 04:04:05,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:05,804 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:05,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:05,806 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:05,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-03 04:04:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:06,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 04:04:06,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:06,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:06,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:06,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [29417759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:06,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354393372] [2022-11-03 04:04:06,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:06,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:06,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:04:06,678 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:04:06,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 04:04:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:06,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 04:04:06,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:07,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:09,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354393372] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:09,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:04:09,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 15, 15] total 48 [2022-11-03 04:04:09,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532556549] [2022-11-03 04:04:09,271 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:04:09,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 04:04:09,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:09,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 04:04:09,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2093, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 04:04:09,274 INFO L87 Difference]: Start difference. First operand 94 states and 125 transitions. Second operand has 48 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 48 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:10,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:10,933 INFO L93 Difference]: Finished difference Result 307 states and 415 transitions. [2022-11-03 04:04:10,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 04:04:10,934 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 48 states have internal predecessors, (121), 0 states have call successors, (0), 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 36 [2022-11-03 04:04:10,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:10,935 INFO L225 Difference]: With dead ends: 307 [2022-11-03 04:04:10,935 INFO L226 Difference]: Without dead ends: 305 [2022-11-03 04:04:10,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=824, Invalid=4146, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 04:04:10,938 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 807 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 1376 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:10,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 1376 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 160 Invalid, 0 Unknown, 316 Unchecked, 0.2s Time] [2022-11-03 04:04:10,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-11-03 04:04:10,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 120. [2022-11-03 04:04:10,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.3361344537815125) internal successors, (159), 119 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:10,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 159 transitions. [2022-11-03 04:04:10,946 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 159 transitions. Word has length 36 [2022-11-03 04:04:10,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:10,947 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 159 transitions. [2022-11-03 04:04:10,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 48 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:10,947 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 159 transitions. [2022-11-03 04:04:10,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 04:04:10,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:10,948 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] [2022-11-03 04:04:10,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:11,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:11,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:11,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:11,561 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:11,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:11,561 INFO L85 PathProgramCache]: Analyzing trace with hash 64262617, now seen corresponding path program 1 times [2022-11-03 04:04:11,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:11,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333044885] [2022-11-03 04:04:11,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:11,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:11,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:11,563 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:11,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 04:04:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:11,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:04:11,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:11,716 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 04:04:11,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:11,717 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:11,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333044885] [2022-11-03 04:04:11,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333044885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:11,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:11,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:04:11,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413766075] [2022-11-03 04:04:11,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:11,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:04:11,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:11,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:04:11,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:04:11,720 INFO L87 Difference]: Start difference. First operand 120 states and 159 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:11,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:11,792 INFO L93 Difference]: Finished difference Result 226 states and 301 transitions. [2022-11-03 04:04:11,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:04:11,792 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 04:04:11,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:11,793 INFO L225 Difference]: With dead ends: 226 [2022-11-03 04:04:11,793 INFO L226 Difference]: Without dead ends: 140 [2022-11-03 04:04:11,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 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 04:04:11,794 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 110 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:11,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 183 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:04:11,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-03 04:04:11,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 120. [2022-11-03 04:04:11,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.319327731092437) internal successors, (157), 119 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:11,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 157 transitions. [2022-11-03 04:04:11,801 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 157 transitions. Word has length 36 [2022-11-03 04:04:11,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:11,801 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 157 transitions. [2022-11-03 04:04:11,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:11,802 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 157 transitions. [2022-11-03 04:04:11,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 04:04:11,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:11,803 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] [2022-11-03 04:04:11,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:12,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:04:12,015 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:12,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:12,015 INFO L85 PathProgramCache]: Analyzing trace with hash 2010249561, now seen corresponding path program 1 times [2022-11-03 04:04:12,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:12,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573033285] [2022-11-03 04:04:12,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:12,015 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:12,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:12,017 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:12,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 04:04:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:12,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:04:12,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:12,155 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 04:04:12,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:12,155 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:12,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573033285] [2022-11-03 04:04:12,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573033285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:12,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:12,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:04:12,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966521338] [2022-11-03 04:04:12,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:12,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:04:12,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:12,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:04:12,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:04:12,158 INFO L87 Difference]: Start difference. First operand 120 states and 157 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:12,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:12,221 INFO L93 Difference]: Finished difference Result 200 states and 268 transitions. [2022-11-03 04:04:12,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:04:12,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 04:04:12,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:12,222 INFO L225 Difference]: With dead ends: 200 [2022-11-03 04:04:12,222 INFO L226 Difference]: Without dead ends: 112 [2022-11-03 04:04:12,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 04:04:12,223 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 66 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:12,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 129 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:04:12,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-03 04:04:12,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2022-11-03 04:04:12,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.3333333333333333) internal successors, (132), 99 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 04:04:12,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 132 transitions. [2022-11-03 04:04:12,230 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 132 transitions. Word has length 36 [2022-11-03 04:04:12,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:12,230 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 132 transitions. [2022-11-03 04:04:12,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:12,230 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 132 transitions. [2022-11-03 04:04:12,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 04:04:12,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:12,231 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:12,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:12,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:04:12,444 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:12,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:12,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1180479559, now seen corresponding path program 1 times [2022-11-03 04:04:12,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:12,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663761891] [2022-11-03 04:04:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:12,445 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:12,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:12,446 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:12,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 04:04:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:12,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:04:12,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:12,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:12,914 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:12,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663761891] [2022-11-03 04:04:12,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663761891] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:12,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2092622043] [2022-11-03 04:04:12,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:12,915 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:12,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:12,918 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:12,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 04:04:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:13,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:04:13,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:04:13,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:13,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2092622043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:13,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:04:13,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 15 [2022-11-03 04:04:13,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589387778] [2022-11-03 04:04:13,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:13,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:04:13,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:13,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:04:13,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-03 04:04:13,189 INFO L87 Difference]: Start difference. First operand 100 states and 132 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:13,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:13,264 INFO L93 Difference]: Finished difference Result 234 states and 325 transitions. [2022-11-03 04:04:13,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:04:13,268 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 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 67 [2022-11-03 04:04:13,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:13,276 INFO L225 Difference]: With dead ends: 234 [2022-11-03 04:04:13,277 INFO L226 Difference]: Without dead ends: 178 [2022-11-03 04:04:13,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:04:13,279 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 77 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 307 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 04:04:13,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 307 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:04:13,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-03 04:04:13,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 112. [2022-11-03 04:04:13,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.3423423423423424) internal successors, (149), 111 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:13,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 149 transitions. [2022-11-03 04:04:13,291 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 149 transitions. Word has length 67 [2022-11-03 04:04:13,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:13,293 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 149 transitions. [2022-11-03 04:04:13,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:13,293 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 149 transitions. [2022-11-03 04:04:13,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 04:04:13,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:13,295 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:13,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:13,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:13,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:13,702 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:13,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:13,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1182326601, now seen corresponding path program 1 times [2022-11-03 04:04:13,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:13,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174490664] [2022-11-03 04:04:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:13,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:13,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:13,705 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:13,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 04:04:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:13,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:04:13,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:14,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:14,151 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:14,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174490664] [2022-11-03 04:04:14,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174490664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:14,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1446403107] [2022-11-03 04:04:14,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:14,152 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:14,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:14,154 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:14,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 04:04:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:14,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:04:14,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:14,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:14,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1446403107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:14,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683124384] [2022-11-03 04:04:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:14,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:14,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:04:14,627 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:04:14,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 04:04:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:14,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:04:14,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:04:15,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:04:15,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683124384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:15,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:04:15,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 22 [2022-11-03 04:04:15,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576531207] [2022-11-03 04:04:15,383 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:04:15,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 04:04:15,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:15,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 04:04:15,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-11-03 04:04:15,386 INFO L87 Difference]: Start difference. First operand 112 states and 149 transitions. Second operand has 22 states, 22 states have (on average 7.7272727272727275) internal successors, (170), 22 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 04:04:17,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:17,257 INFO L93 Difference]: Finished difference Result 328 states and 457 transitions. [2022-11-03 04:04:17,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-03 04:04:17,258 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 7.7272727272727275) internal successors, (170), 22 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) Word has length 67 [2022-11-03 04:04:17,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:17,260 INFO L225 Difference]: With dead ends: 328 [2022-11-03 04:04:17,260 INFO L226 Difference]: Without dead ends: 258 [2022-11-03 04:04:17,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 377 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=814, Invalid=2608, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 04:04:17,263 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 405 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:17,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 666 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 194 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2022-11-03 04:04:17,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-11-03 04:04:17,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 157. [2022-11-03 04:04:17,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.358974358974359) internal successors, (212), 156 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:17,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 212 transitions. [2022-11-03 04:04:17,273 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 212 transitions. Word has length 67 [2022-11-03 04:04:17,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:17,274 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 212 transitions. [2022-11-03 04:04:17,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.7272727272727275) internal successors, (170), 22 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 04:04:17,274 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 212 transitions. [2022-11-03 04:04:17,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 04:04:17,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:17,275 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:17,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:17,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:17,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-03 04:04:17,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:17,879 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:17,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:17,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2009315127, now seen corresponding path program 1 times [2022-11-03 04:04:17,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:17,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050748478] [2022-11-03 04:04:17,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:17,880 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:17,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:17,882 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:17,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 04:04:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:18,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:04:18,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:18,220 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:18,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:18,387 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:18,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050748478] [2022-11-03 04:04:18,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050748478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:18,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [474655403] [2022-11-03 04:04:18,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:18,388 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:18,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:18,390 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:18,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-03 04:04:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:18,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:04:18,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:18,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:19,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [474655403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:19,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006866351] [2022-11-03 04:04:19,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:19,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:19,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:04:19,158 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:04:19,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 04:04:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:19,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:04:19,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:04:19,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:04:20,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006866351] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:20,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:04:20,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 33 [2022-11-03 04:04:20,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134718778] [2022-11-03 04:04:20,064 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:04:20,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 04:04:20,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:20,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 04:04:20,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 04:04:20,066 INFO L87 Difference]: Start difference. First operand 157 states and 212 transitions. Second operand has 33 states, 33 states have (on average 8.181818181818182) internal successors, (270), 33 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:24,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:24,991 INFO L93 Difference]: Finished difference Result 1244 states and 1714 transitions. [2022-11-03 04:04:24,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-03 04:04:24,992 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 8.181818181818182) internal successors, (270), 33 states have internal predecessors, (270), 0 states have call successors, (0), 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 67 [2022-11-03 04:04:24,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:24,995 INFO L225 Difference]: With dead ends: 1244 [2022-11-03 04:04:24,995 INFO L226 Difference]: Without dead ends: 1129 [2022-11-03 04:04:24,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2109, Invalid=8193, Unknown=0, NotChecked=0, Total=10302 [2022-11-03 04:04:24,999 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 2316 mSDsluCounter, 2162 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2316 SdHoareTripleChecker+Valid, 2349 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:24,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2316 Valid, 2349 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 682 Invalid, 0 Unknown, 98 Unchecked, 0.7s Time] [2022-11-03 04:04:25,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-11-03 04:04:25,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 225. [2022-11-03 04:04:25,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.34375) internal successors, (301), 224 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:25,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 301 transitions. [2022-11-03 04:04:25,018 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 301 transitions. Word has length 67 [2022-11-03 04:04:25,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:25,019 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 301 transitions. [2022-11-03 04:04:25,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 8.181818181818182) internal successors, (270), 33 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:25,019 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 301 transitions. [2022-11-03 04:04:25,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 04:04:25,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:25,020 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:25,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:25,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:25,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:25,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:25,624 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:25,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:25,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1719351241, now seen corresponding path program 1 times [2022-11-03 04:04:25,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:25,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130392971] [2022-11-03 04:04:25,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:25,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:25,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:25,626 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:25,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 04:04:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:25,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 04:04:25,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:26,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:26,631 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:26,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130392971] [2022-11-03 04:04:26,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130392971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:26,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [418751513] [2022-11-03 04:04:26,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:26,632 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:26,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:26,632 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:26,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 04:04:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:26,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 04:04:26,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:27,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:27,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [418751513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:27,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675529567] [2022-11-03 04:04:27,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:27,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:27,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:04:27,587 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:04:27,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 04:04:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:27,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:04:27,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:04:28,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:28,521 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:04:28,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675529567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:28,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:04:28,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10, 10, 8, 8] total 34 [2022-11-03 04:04:28,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502201161] [2022-11-03 04:04:28,523 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:04:28,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 04:04:28,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:28,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 04:04:28,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 04:04:28,525 INFO L87 Difference]: Start difference. First operand 225 states and 301 transitions. Second operand has 34 states, 34 states have (on average 7.911764705882353) internal successors, (269), 34 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:34,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:34,298 INFO L93 Difference]: Finished difference Result 1550 states and 2057 transitions. [2022-11-03 04:04:34,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-03 04:04:34,299 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 7.911764705882353) internal successors, (269), 34 states have internal predecessors, (269), 0 states have call successors, (0), 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 67 [2022-11-03 04:04:34,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:34,303 INFO L225 Difference]: With dead ends: 1550 [2022-11-03 04:04:34,304 INFO L226 Difference]: Without dead ends: 1367 [2022-11-03 04:04:34,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4404 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3388, Invalid=12614, Unknown=0, NotChecked=0, Total=16002 [2022-11-03 04:04:34,309 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 2431 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2431 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:34,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2431 Valid, 1150 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 501 Invalid, 0 Unknown, 177 Unchecked, 0.6s Time] [2022-11-03 04:04:34,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2022-11-03 04:04:34,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 259. [2022-11-03 04:04:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.3333333333333333) internal successors, (344), 258 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 344 transitions. [2022-11-03 04:04:34,334 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 344 transitions. Word has length 67 [2022-11-03 04:04:34,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:34,334 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 344 transitions. [2022-11-03 04:04:34,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 7.911764705882353) internal successors, (269), 34 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:34,334 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 344 transitions. [2022-11-03 04:04:34,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 04:04:34,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:34,339 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:34,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:34,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:34,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2022-11-03 04:04:34,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:34,952 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:34,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:34,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1695795663, now seen corresponding path program 1 times [2022-11-03 04:04:34,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:34,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530644551] [2022-11-03 04:04:34,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:34,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:34,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:34,955 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:34,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 04:04:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:35,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:04:35,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:35,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:35,398 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:35,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530644551] [2022-11-03 04:04:35,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530644551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:35,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1782834886] [2022-11-03 04:04:35,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:35,398 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:35,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:35,399 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:35,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 04:04:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:35,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:04:35,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:35,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:35,853 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:35,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1782834886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:35,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413997094] [2022-11-03 04:04:35,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:35,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:35,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:04:35,859 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:04:35,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-03 04:04:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:35,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:04:35,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:36,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:04:36,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413997094] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:04:36,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-11-03 04:04:36,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8, 8, 8, 7] total 18 [2022-11-03 04:04:36,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944045145] [2022-11-03 04:04:36,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:36,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:04:36,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:36,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:04:36,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:04:36,178 INFO L87 Difference]: Start difference. First operand 259 states and 344 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:36,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:36,317 INFO L93 Difference]: Finished difference Result 998 states and 1340 transitions. [2022-11-03 04:04:36,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:04:36,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-03 04:04:36,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:36,320 INFO L225 Difference]: With dead ends: 998 [2022-11-03 04:04:36,321 INFO L226 Difference]: Without dead ends: 781 [2022-11-03 04:04:36,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 380 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-11-03 04:04:36,322 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 225 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:36,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 140 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:04:36,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-11-03 04:04:36,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 387. [2022-11-03 04:04:36,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.3264248704663213) internal successors, (512), 386 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 512 transitions. [2022-11-03 04:04:36,345 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 512 transitions. Word has length 67 [2022-11-03 04:04:36,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:36,345 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 512 transitions. [2022-11-03 04:04:36,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:36,345 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 512 transitions. [2022-11-03 04:04:36,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 04:04:36,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:36,347 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:36,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-03 04:04:36,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:36,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-11-03 04:04:36,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:36,973 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:36,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:36,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1319307955, now seen corresponding path program 1 times [2022-11-03 04:04:36,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:36,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008687970] [2022-11-03 04:04:36,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:36,974 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:36,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:36,975 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:36,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 04:04:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:37,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:04:37,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:37,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:37,365 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:37,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008687970] [2022-11-03 04:04:37,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008687970] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:37,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [106121155] [2022-11-03 04:04:37,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:37,365 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:37,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:37,366 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:37,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-03 04:04:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:37,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:04:37,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:37,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:37,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [106121155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:37,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592604728] [2022-11-03 04:04:37,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:37,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:37,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:04:37,809 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:04:37,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-03 04:04:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:37,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:04:37,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:38,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:04:38,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592604728] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:04:38,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-11-03 04:04:38,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8, 8, 8, 7] total 16 [2022-11-03 04:04:38,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263937827] [2022-11-03 04:04:38,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:38,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:04:38,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:38,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:04:38,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:04:38,053 INFO L87 Difference]: Start difference. First operand 387 states and 512 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:38,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:38,165 INFO L93 Difference]: Finished difference Result 968 states and 1289 transitions. [2022-11-03 04:04:38,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:04:38,165 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-03 04:04:38,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:38,168 INFO L225 Difference]: With dead ends: 968 [2022-11-03 04:04:38,168 INFO L226 Difference]: Without dead ends: 623 [2022-11-03 04:04:38,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 382 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:04:38,169 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 204 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:38,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 128 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:04:38,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-11-03 04:04:38,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 371. [2022-11-03 04:04:38,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.3135135135135134) internal successors, (486), 370 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:38,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 486 transitions. [2022-11-03 04:04:38,191 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 486 transitions. Word has length 67 [2022-11-03 04:04:38,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:38,191 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 486 transitions. [2022-11-03 04:04:38,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:38,192 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 486 transitions. [2022-11-03 04:04:38,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 04:04:38,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:38,193 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:38,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:38,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-11-03 04:04:38,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-03 04:04:38,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:04:38,807 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:38,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:38,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1897571759, now seen corresponding path program 1 times [2022-11-03 04:04:38,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:38,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217703836] [2022-11-03 04:04:38,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:38,808 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:38,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:38,808 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:38,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 04:04:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:38,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:04:38,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:39,075 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:39,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:39,170 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:39,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217703836] [2022-11-03 04:04:39,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217703836] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:39,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [908033383] [2022-11-03 04:04:39,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:39,170 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:39,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:39,171 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:39,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-03 04:04:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:39,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:04:39,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:39,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:39,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [908033383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:39,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769714975] [2022-11-03 04:04:39,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:39,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:39,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:04:39,589 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:04:39,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-03 04:04:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:39,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:04:39,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:39,827 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:39,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:04:39,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769714975] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:04:39,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-11-03 04:04:39,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8, 8, 8, 7] total 17 [2022-11-03 04:04:39,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332037287] [2022-11-03 04:04:39,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:39,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:04:39,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:39,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:04:39,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:04:39,855 INFO L87 Difference]: Start difference. First operand 371 states and 486 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:39,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:39,987 INFO L93 Difference]: Finished difference Result 858 states and 1117 transitions. [2022-11-03 04:04:39,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:04:39,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-03 04:04:39,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:39,990 INFO L225 Difference]: With dead ends: 858 [2022-11-03 04:04:39,990 INFO L226 Difference]: Without dead ends: 489 [2022-11-03 04:04:39,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 381 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:04:39,992 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 123 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:39,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 203 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:04:39,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-11-03 04:04:40,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 315. [2022-11-03 04:04:40,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.2898089171974523) internal successors, (405), 314 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:40,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 405 transitions. [2022-11-03 04:04:40,012 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 405 transitions. Word has length 67 [2022-11-03 04:04:40,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:40,013 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 405 transitions. [2022-11-03 04:04:40,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:40,013 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 405 transitions. [2022-11-03 04:04:40,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 04:04:40,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:40,014 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:40,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:40,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:40,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:40,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:40,618 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:40,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:40,618 INFO L85 PathProgramCache]: Analyzing trace with hash -443759865, now seen corresponding path program 1 times [2022-11-03 04:04:40,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:40,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [240745300] [2022-11-03 04:04:40,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:40,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:40,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:40,620 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:40,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 04:04:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:40,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:04:40,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:04:40,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:40,889 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:40,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [240745300] [2022-11-03 04:04:40,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [240745300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:40,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:40,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:04:40,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015517177] [2022-11-03 04:04:40,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:40,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:04:40,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:40,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:04:40,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:04:40,891 INFO L87 Difference]: Start difference. First operand 315 states and 405 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:40,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:40,917 INFO L93 Difference]: Finished difference Result 590 states and 764 transitions. [2022-11-03 04:04:40,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:04:40,918 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-03 04:04:40,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:40,920 INFO L225 Difference]: With dead ends: 590 [2022-11-03 04:04:40,920 INFO L226 Difference]: Without dead ends: 317 [2022-11-03 04:04:40,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:04:40,921 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 20 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:40,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 202 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-11-03 04:04:40,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-11-03 04:04:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2022-11-03 04:04:40,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.2879746835443038) internal successors, (407), 316 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:40,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 407 transitions. [2022-11-03 04:04:40,940 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 407 transitions. Word has length 67 [2022-11-03 04:04:40,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:40,940 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 407 transitions. [2022-11-03 04:04:40,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:40,941 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 407 transitions. [2022-11-03 04:04:40,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 04:04:40,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:40,942 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:40,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:41,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:04:41,155 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:41,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:41,155 INFO L85 PathProgramCache]: Analyzing trace with hash 461363271, now seen corresponding path program 1 times [2022-11-03 04:04:41,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:41,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8520194] [2022-11-03 04:04:41,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:41,156 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:41,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:41,157 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:41,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 04:04:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:41,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 04:04:41,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:41,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:41,955 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:41,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8520194] [2022-11-03 04:04:41,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8520194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:41,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2031554603] [2022-11-03 04:04:41,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:41,956 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:41,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:41,957 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:41,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-03 04:04:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:42,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 04:04:42,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:42,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:42,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2031554603] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:42,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794341600] [2022-11-03 04:04:42,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:42,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:42,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:04:42,896 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:04:42,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-03 04:04:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:43,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 04:04:43,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:43,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:43,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794341600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:43,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:04:43,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 16, 14, 14, 14] total 36 [2022-11-03 04:04:43,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796874467] [2022-11-03 04:04:43,274 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:04:43,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 04:04:43,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:43,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 04:04:43,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 04:04:43,276 INFO L87 Difference]: Start difference. First operand 317 states and 407 transitions. Second operand has 36 states, 36 states have (on average 3.388888888888889) internal successors, (122), 36 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:46,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:46,102 INFO L93 Difference]: Finished difference Result 1271 states and 1641 transitions. [2022-11-03 04:04:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-03 04:04:46,103 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.388888888888889) internal successors, (122), 36 states have internal predecessors, (122), 0 states have call successors, (0), 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 67 [2022-11-03 04:04:46,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:46,105 INFO L225 Difference]: With dead ends: 1271 [2022-11-03 04:04:46,105 INFO L226 Difference]: Without dead ends: 1074 [2022-11-03 04:04:46,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1856 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1562, Invalid=6448, Unknown=0, NotChecked=0, Total=8010 [2022-11-03 04:04:46,108 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 1386 mSDsluCounter, 2062 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1386 SdHoareTripleChecker+Valid, 2203 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:46,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1386 Valid, 2203 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 04:04:46,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-11-03 04:04:46,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 322. [2022-11-03 04:04:46,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.2834890965732086) internal successors, (412), 321 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:46,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 412 transitions. [2022-11-03 04:04:46,133 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 412 transitions. Word has length 67 [2022-11-03 04:04:46,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:46,133 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 412 transitions. [2022-11-03 04:04:46,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.388888888888889) internal successors, (122), 36 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:46,133 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 412 transitions. [2022-11-03 04:04:46,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 04:04:46,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:46,134 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, 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 04:04:46,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:46,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:46,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:46,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:46,755 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:46,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:46,756 INFO L85 PathProgramCache]: Analyzing trace with hash -116900533, now seen corresponding path program 1 times [2022-11-03 04:04:46,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:46,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010083277] [2022-11-03 04:04:46,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:46,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:46,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:46,758 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:46,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 04:04:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:46,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:04:46,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:47,146 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:47,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:47,618 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:47,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010083277] [2022-11-03 04:04:47,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010083277] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:47,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1242366467] [2022-11-03 04:04:47,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:47,618 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:47,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:47,619 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:47,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-03 04:04:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:47,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 04:04:47,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:48,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:49,005 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:49,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1242366467] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:49,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679324637] [2022-11-03 04:04:49,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:49,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:49,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:04:49,007 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:04:49,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-03 04:04:49,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:49,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 04:04:49,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:49,925 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:49,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:50,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679324637] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:50,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:04:50,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 17, 14, 14, 14] total 69 [2022-11-03 04:04:50,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411250719] [2022-11-03 04:04:50,770 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:04:50,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-03 04:04:50,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:50,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-03 04:04:50,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=4477, Unknown=0, NotChecked=0, Total=4692 [2022-11-03 04:04:50,773 INFO L87 Difference]: Start difference. First operand 322 states and 412 transitions. Second operand has 69 states, 69 states have (on average 3.652173913043478) internal successors, (252), 69 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:57,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:57,365 INFO L93 Difference]: Finished difference Result 7009 states and 8868 transitions. [2022-11-03 04:05:57,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 657 states. [2022-11-03 04:05:57,369 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.652173913043478) internal successors, (252), 69 states have internal predecessors, (252), 0 states have call successors, (0), 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 67 [2022-11-03 04:05:57,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:57,382 INFO L225 Difference]: With dead ends: 7009 [2022-11-03 04:05:57,382 INFO L226 Difference]: Without dead ends: 6731 [2022-11-03 04:05:57,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1061 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 722 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221893 ImplicationChecksByTransitivity, 60.1s TimeCoverageRelationStatistics Valid=45998, Invalid=477454, Unknown=0, NotChecked=0, Total=523452 [2022-11-03 04:05:57,413 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 6670 mSDsluCounter, 12998 mSDsCounter, 0 mSdLazyCounter, 7217 mSolverCounterSat, 979 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6670 SdHoareTripleChecker+Valid, 13412 SdHoareTripleChecker+Invalid, 9937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 979 IncrementalHoareTripleChecker+Valid, 7217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1741 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:57,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6670 Valid, 13412 Invalid, 9937 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [979 Valid, 7217 Invalid, 0 Unknown, 1741 Unchecked, 6.7s Time] [2022-11-03 04:05:57,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6731 states. [2022-11-03 04:05:57,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6731 to 884. [2022-11-03 04:05:57,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 1.2808607021517553) internal successors, (1131), 883 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:57,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1131 transitions. [2022-11-03 04:05:57,619 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1131 transitions. Word has length 67 [2022-11-03 04:05:57,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:57,621 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 1131 transitions. [2022-11-03 04:05:57,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.652173913043478) internal successors, (252), 69 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:57,622 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1131 transitions. [2022-11-03 04:05:57,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 04:05:57,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:57,623 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:05:57,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:57,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-11-03 04:05:58,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-03 04:05:58,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:05:58,227 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:58,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:58,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1809517235, now seen corresponding path program 1 times [2022-11-03 04:05:58,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:05:58,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576068585] [2022-11-03 04:05:58,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:58,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:05:58,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:05:58,229 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:05:58,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 04:05:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:58,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 04:05:58,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:58,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:59,046 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:05:59,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576068585] [2022-11-03 04:05:59,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576068585] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:59,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [786008900] [2022-11-03 04:05:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:59,047 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:59,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:05:59,048 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:05:59,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-03 04:05:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:59,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 04:05:59,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:59,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:59,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [786008900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:59,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757646152] [2022-11-03 04:05:59,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:59,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:59,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:05:59,763 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:05:59,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-03 04:05:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:59,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 04:05:59,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:06:00,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:06:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:06:01,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757646152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:06:01,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:06:01,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 17, 14, 14, 14] total 50 [2022-11-03 04:06:01,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899815728] [2022-11-03 04:06:01,356 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:06:01,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-03 04:06:01,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:06:01,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-03 04:06:01,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=2326, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 04:06:01,357 INFO L87 Difference]: Start difference. First operand 884 states and 1131 transitions. Second operand has 50 states, 50 states have (on average 4.54) internal successors, (227), 50 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:53,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:06:53,909 INFO L93 Difference]: Finished difference Result 14339 states and 17876 transitions. [2022-11-03 04:06:53,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 561 states. [2022-11-03 04:06:53,910 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.54) internal successors, (227), 50 states have internal predecessors, (227), 0 states have call successors, (0), 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 67 [2022-11-03 04:06:53,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:06:53,932 INFO L225 Difference]: With dead ends: 14339 [2022-11-03 04:06:53,933 INFO L226 Difference]: Without dead ends: 13509 [2022-11-03 04:06:53,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 607 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159135 ImplicationChecksByTransitivity, 46.0s TimeCoverageRelationStatistics Valid=29383, Invalid=340889, Unknown=0, NotChecked=0, Total=370272 [2022-11-03 04:06:53,969 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 9996 mSDsluCounter, 8449 mSDsCounter, 0 mSdLazyCounter, 6700 mSolverCounterSat, 1638 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9996 SdHoareTripleChecker+Valid, 8873 SdHoareTripleChecker+Invalid, 8338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1638 IncrementalHoareTripleChecker+Valid, 6700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:06:53,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9996 Valid, 8873 Invalid, 8338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1638 Valid, 6700 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-03 04:06:53,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13509 states. [2022-11-03 04:06:54,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13509 to 1022. [2022-11-03 04:06:54,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 1.2732615083251715) internal successors, (1300), 1021 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:54,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1300 transitions. [2022-11-03 04:06:54,144 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1300 transitions. Word has length 67 [2022-11-03 04:06:54,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:06:54,144 INFO L495 AbstractCegarLoop]: Abstraction has 1022 states and 1300 transitions. [2022-11-03 04:06:54,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.54) internal successors, (227), 50 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:54,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1300 transitions. [2022-11-03 04:06:54,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 04:06:54,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:54,147 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, 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 04:06:54,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-11-03 04:06:54,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-03 04:06:54,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 04:06:54,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:06:54,751 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:06:54,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:54,752 INFO L85 PathProgramCache]: Analyzing trace with hash -321530161, now seen corresponding path program 1 times [2022-11-03 04:06:54,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:06:54,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [869540805] [2022-11-03 04:06:54,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:54,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:06:54,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:06:54,754 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:06:54,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 04:06:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:54,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:06:54,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:06:55,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:06:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:06:55,747 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:06:55,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [869540805] [2022-11-03 04:06:55,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [869540805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:06:55,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [741465522] [2022-11-03 04:06:55,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:55,748 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:06:55,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:06:55,749 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:06:55,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-03 04:06:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:55,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 04:06:55,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:06:56,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:06:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:06:57,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [741465522] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:06:57,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189619737] [2022-11-03 04:06:57,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:57,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:57,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:06:57,195 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:06:57,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-03 04:06:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:57,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:06:57,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:06:57,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:06:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:06:58,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189619737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:06:58,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:06:58,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 17, 14, 8, 8] total 56 [2022-11-03 04:06:58,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964288979] [2022-11-03 04:06:58,289 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:06:58,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-03 04:06:58,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:06:58,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-03 04:06:58,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2892, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 04:06:58,292 INFO L87 Difference]: Start difference. First operand 1022 states and 1300 transitions. Second operand has 56 states, 56 states have (on average 5.142857142857143) internal successors, (288), 56 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:07,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:07,946 INFO L93 Difference]: Finished difference Result 7109 states and 9048 transitions. [2022-11-03 04:07:07,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-03 04:07:07,947 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 5.142857142857143) internal successors, (288), 56 states have internal predecessors, (288), 0 states have call successors, (0), 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 67 [2022-11-03 04:07:07,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:07,957 INFO L225 Difference]: With dead ends: 7109 [2022-11-03 04:07:07,958 INFO L226 Difference]: Without dead ends: 6141 [2022-11-03 04:07:07,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5226 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=3308, Invalid=17572, Unknown=0, NotChecked=0, Total=20880 [2022-11-03 04:07:07,963 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 2441 mSDsluCounter, 3099 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2441 SdHoareTripleChecker+Valid, 3241 SdHoareTripleChecker+Invalid, 2132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 472 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:07,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2441 Valid, 3241 Invalid, 2132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 1355 Invalid, 0 Unknown, 472 Unchecked, 1.3s Time] [2022-11-03 04:07:07,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6141 states. [2022-11-03 04:07:08,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6141 to 1100. [2022-11-03 04:07:08,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 1.2793448589626935) internal successors, (1406), 1099 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:08,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1406 transitions. [2022-11-03 04:07:08,174 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1406 transitions. Word has length 67 [2022-11-03 04:07:08,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:08,174 INFO L495 AbstractCegarLoop]: Abstraction has 1100 states and 1406 transitions. [2022-11-03 04:07:08,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 5.142857142857143) internal successors, (288), 56 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:08,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1406 transitions. [2022-11-03 04:07:08,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 04:07:08,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:08,176 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, 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 04:07:08,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:08,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-11-03 04:07:08,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:08,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:08,803 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:08,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:08,803 INFO L85 PathProgramCache]: Analyzing trace with hash -228277805, now seen corresponding path program 1 times [2022-11-03 04:07:08,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:08,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300581729] [2022-11-03 04:07:08,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:08,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:08,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:08,804 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:08,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 04:07:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:08,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 04:07:08,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:09,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:09,632 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:09,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300581729] [2022-11-03 04:07:09,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300581729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:09,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [334334347] [2022-11-03 04:07:09,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:09,632 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:09,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:07:09,638 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:07:09,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-03 04:07:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:09,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 04:07:09,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:10,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:10,693 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:10,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [334334347] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:10,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550862452] [2022-11-03 04:07:10,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:10,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:10,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:10,699 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:10,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-03 04:07:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:10,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 04:07:10,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:11,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:11,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550862452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:11,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:07:11,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 16, 14, 14, 14] total 36 [2022-11-03 04:07:11,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386886403] [2022-11-03 04:07:11,176 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:07:11,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 04:07:11,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:11,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 04:07:11,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 04:07:11,178 INFO L87 Difference]: Start difference. First operand 1100 states and 1406 transitions. Second operand has 36 states, 36 states have (on average 3.9444444444444446) internal successors, (142), 36 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:14,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:14,005 INFO L93 Difference]: Finished difference Result 3764 states and 4746 transitions. [2022-11-03 04:07:14,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-03 04:07:14,005 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.9444444444444446) internal successors, (142), 36 states have internal predecessors, (142), 0 states have call successors, (0), 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 67 [2022-11-03 04:07:14,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:14,011 INFO L225 Difference]: With dead ends: 3764 [2022-11-03 04:07:14,011 INFO L226 Difference]: Without dead ends: 3407 [2022-11-03 04:07:14,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1300, Invalid=6010, Unknown=0, NotChecked=0, Total=7310 [2022-11-03 04:07:14,013 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 1352 mSDsluCounter, 2255 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1352 SdHoareTripleChecker+Valid, 2403 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:14,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1352 Valid, 2403 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 04:07:14,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2022-11-03 04:07:14,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 1105. [2022-11-03 04:07:14,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 1.2817028985507246) internal successors, (1415), 1104 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:14,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1415 transitions. [2022-11-03 04:07:14,131 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1415 transitions. Word has length 67 [2022-11-03 04:07:14,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:14,131 INFO L495 AbstractCegarLoop]: Abstraction has 1105 states and 1415 transitions. [2022-11-03 04:07:14,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.9444444444444446) internal successors, (142), 36 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:14,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1415 transitions. [2022-11-03 04:07:14,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 04:07:14,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:14,133 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, 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 04:07:14,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:14,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-11-03 04:07:14,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:14,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:14,747 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:14,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:14,747 INFO L85 PathProgramCache]: Analyzing trace with hash 472786773, now seen corresponding path program 1 times [2022-11-03 04:07:14,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:14,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576717436] [2022-11-03 04:07:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:14,748 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:14,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:14,748 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:14,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 04:07:14,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:14,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 04:07:14,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:16,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:19,836 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:19,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576717436] [2022-11-03 04:07:19,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1576717436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:19,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1415889222] [2022-11-03 04:07:19,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:19,837 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:19,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:07:19,838 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:07:19,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-03 04:07:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:20,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 04:07:20,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:20,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:21,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1415889222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:21,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055054571] [2022-11-03 04:07:21,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:21,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:21,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:21,354 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:21,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-03 04:07:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:21,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 04:07:21,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:22,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:23,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055054571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:23,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:07:23,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 25, 26, 26] total 50 [2022-11-03 04:07:23,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127223346] [2022-11-03 04:07:23,200 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:07:23,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-03 04:07:23,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:23,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-03 04:07:23,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2320, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 04:07:23,202 INFO L87 Difference]: Start difference. First operand 1105 states and 1415 transitions. Second operand has 50 states, 50 states have (on average 2.72) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:30,402 INFO L93 Difference]: Finished difference Result 1791 states and 2275 transitions. [2022-11-03 04:07:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-03 04:07:30,403 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.72) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 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 67 [2022-11-03 04:07:30,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:30,406 INFO L225 Difference]: With dead ends: 1791 [2022-11-03 04:07:30,406 INFO L226 Difference]: Without dead ends: 1789 [2022-11-03 04:07:30,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 347 SyntacticMatches, 4 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2447 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1250, Invalid=11182, Unknown=0, NotChecked=0, Total=12432 [2022-11-03 04:07:30,408 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 889 mSDsluCounter, 5829 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 6008 SdHoareTripleChecker+Invalid, 2444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1398 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:30,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 6008 Invalid, 2444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 985 Invalid, 0 Unknown, 1398 Unchecked, 1.1s Time] [2022-11-03 04:07:30,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2022-11-03 04:07:30,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1256. [2022-11-03 04:07:30,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 1.2828685258964143) internal successors, (1610), 1255 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:30,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1610 transitions. [2022-11-03 04:07:30,504 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1610 transitions. Word has length 67 [2022-11-03 04:07:30,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:30,505 INFO L495 AbstractCegarLoop]: Abstraction has 1256 states and 1610 transitions. [2022-11-03 04:07:30,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.72) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:30,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1610 transitions. [2022-11-03 04:07:30,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 04:07:30,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:30,507 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, 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 04:07:30,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-03 04:07:30,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-11-03 04:07:30,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:31,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:31,120 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:31,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:31,120 INFO L85 PathProgramCache]: Analyzing trace with hash 895488599, now seen corresponding path program 1 times [2022-11-03 04:07:31,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:31,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737751426] [2022-11-03 04:07:31,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:31,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:31,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:31,122 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:31,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 04:07:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:31,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 04:07:31,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:31,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:32,533 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:32,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737751426] [2022-11-03 04:07:32,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737751426] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:32,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1043946060] [2022-11-03 04:07:32,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:32,534 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:32,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:07:32,535 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:07:32,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-03 04:07:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:32,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 04:07:32,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:33,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:33,364 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:33,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1043946060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:33,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129121366] [2022-11-03 04:07:33,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:33,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:33,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:33,366 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:33,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-03 04:07:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:33,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 04:07:33,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:33,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:34,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129121366] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:34,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:07:34,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 26 [2022-11-03 04:07:34,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087929557] [2022-11-03 04:07:34,140 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:07:34,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 04:07:34,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:34,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 04:07:34,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2022-11-03 04:07:34,141 INFO L87 Difference]: Start difference. First operand 1256 states and 1610 transitions. Second operand has 26 states, 26 states have (on average 4.346153846153846) internal successors, (113), 26 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:36,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:36,909 INFO L93 Difference]: Finished difference Result 9530 states and 12175 transitions. [2022-11-03 04:07:36,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-03 04:07:36,910 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.346153846153846) internal successors, (113), 26 states have internal predecessors, (113), 0 states have call successors, (0), 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 67 [2022-11-03 04:07:36,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:36,921 INFO L225 Difference]: With dead ends: 9530 [2022-11-03 04:07:36,921 INFO L226 Difference]: Without dead ends: 8479 [2022-11-03 04:07:36,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 370 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=976, Invalid=4426, Unknown=0, NotChecked=0, Total=5402 [2022-11-03 04:07:36,925 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 648 mSDsluCounter, 4330 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 4636 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 681 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:36,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 4636 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 553 Invalid, 0 Unknown, 681 Unchecked, 0.5s Time] [2022-11-03 04:07:36,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8479 states. [2022-11-03 04:07:37,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8479 to 3237. [2022-11-03 04:07:37,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 1.2867737948084055) internal successors, (4164), 3236 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:37,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 4164 transitions. [2022-11-03 04:07:37,255 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 4164 transitions. Word has length 67 [2022-11-03 04:07:37,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:37,256 INFO L495 AbstractCegarLoop]: Abstraction has 3237 states and 4164 transitions. [2022-11-03 04:07:37,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.346153846153846) internal successors, (113), 26 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:37,256 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 4164 transitions. [2022-11-03 04:07:37,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 04:07:37,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:37,257 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, 1, 1, 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 04:07:37,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:37,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-11-03 04:07:37,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2022-11-03 04:07:37,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:37,867 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:37,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:37,867 INFO L85 PathProgramCache]: Analyzing trace with hash 2059524751, now seen corresponding path program 1 times [2022-11-03 04:07:37,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:37,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100235653] [2022-11-03 04:07:37,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:37,868 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:37,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:37,869 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:37,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-03 04:07:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:38,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:07:38,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:07:38,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:38,091 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:38,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100235653] [2022-11-03 04:07:38,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100235653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:38,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:38,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:07:38,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831892621] [2022-11-03 04:07:38,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:38,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:07:38,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:38,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:07:38,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:07:38,093 INFO L87 Difference]: Start difference. First operand 3237 states and 4164 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:38,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:38,334 INFO L93 Difference]: Finished difference Result 6506 states and 8364 transitions. [2022-11-03 04:07:38,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:07:38,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-03 04:07:38,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:38,340 INFO L225 Difference]: With dead ends: 6506 [2022-11-03 04:07:38,340 INFO L226 Difference]: Without dead ends: 3338 [2022-11-03 04:07:38,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 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 04:07:38,344 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 95 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:38,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 195 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:07:38,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2022-11-03 04:07:38,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3196. [2022-11-03 04:07:38,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3196 states, 3195 states have (on average 1.2860719874804383) internal successors, (4109), 3195 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3196 states to 3196 states and 4109 transitions. [2022-11-03 04:07:38,730 INFO L78 Accepts]: Start accepts. Automaton has 3196 states and 4109 transitions. Word has length 67 [2022-11-03 04:07:38,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:38,730 INFO L495 AbstractCegarLoop]: Abstraction has 3196 states and 4109 transitions. [2022-11-03 04:07:38,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:38,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3196 states and 4109 transitions. [2022-11-03 04:07:38,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 04:07:38,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:38,732 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, 1, 1, 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 04:07:38,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-11-03 04:07:38,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:38,945 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:38,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:38,945 INFO L85 PathProgramCache]: Analyzing trace with hash -615488753, now seen corresponding path program 1 times [2022-11-03 04:07:38,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:38,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1808155935] [2022-11-03 04:07:38,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:38,946 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:38,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:38,947 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:38,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 04:07:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:39,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:07:39,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:07:39,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:39,158 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:39,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1808155935] [2022-11-03 04:07:39,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1808155935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:39,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:39,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:07:39,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32825309] [2022-11-03 04:07:39,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:39,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:07:39,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:39,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:07:39,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:07:39,160 INFO L87 Difference]: Start difference. First operand 3196 states and 4109 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:39,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:39,313 INFO L93 Difference]: Finished difference Result 4629 states and 5942 transitions. [2022-11-03 04:07:39,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:07:39,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-03 04:07:39,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:39,316 INFO L225 Difference]: With dead ends: 4629 [2022-11-03 04:07:39,316 INFO L226 Difference]: Without dead ends: 1589 [2022-11-03 04:07:39,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 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 04:07:39,320 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 50 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:39,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 139 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:07:39,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2022-11-03 04:07:39,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1551. [2022-11-03 04:07:39,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1550 states have (on average 1.2793548387096774) internal successors, (1983), 1550 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 1983 transitions. [2022-11-03 04:07:39,480 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 1983 transitions. Word has length 67 [2022-11-03 04:07:39,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:39,481 INFO L495 AbstractCegarLoop]: Abstraction has 1551 states and 1983 transitions. [2022-11-03 04:07:39,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:39,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 1983 transitions. [2022-11-03 04:07:39,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 04:07:39,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:39,483 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:39,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:39,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:39,696 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:39,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:39,696 INFO L85 PathProgramCache]: Analyzing trace with hash 392120467, now seen corresponding path program 1 times [2022-11-03 04:07:39,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:39,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151225340] [2022-11-03 04:07:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:39,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:39,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:39,698 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:39,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-03 04:07:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:39,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 04:07:39,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 04:07:40,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 04:07:40,961 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:40,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151225340] [2022-11-03 04:07:40,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151225340] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:40,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [838055067] [2022-11-03 04:07:40,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:40,962 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:40,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:07:40,966 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:07:40,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-03 04:07:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:41,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:07:41,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 04:07:41,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:41,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [838055067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:41,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:07:41,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 15 [2022-11-03 04:07:41,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186302080] [2022-11-03 04:07:41,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:41,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:07:41,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:41,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:07:41,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-11-03 04:07:41,298 INFO L87 Difference]: Start difference. First operand 1551 states and 1983 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:41,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:41,433 INFO L93 Difference]: Finished difference Result 2879 states and 3724 transitions. [2022-11-03 04:07:41,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:07:41,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 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 98 [2022-11-03 04:07:41,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:41,435 INFO L225 Difference]: With dead ends: 2879 [2022-11-03 04:07:41,435 INFO L226 Difference]: Without dead ends: 1484 [2022-11-03 04:07:41,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:07:41,438 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 117 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:41,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 231 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:07:41,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2022-11-03 04:07:41,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1200. [2022-11-03 04:07:41,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 1.28023352793995) internal successors, (1535), 1199 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:41,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1535 transitions. [2022-11-03 04:07:41,516 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1535 transitions. Word has length 98 [2022-11-03 04:07:41,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:41,516 INFO L495 AbstractCegarLoop]: Abstraction has 1200 states and 1535 transitions. [2022-11-03 04:07:41,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:41,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1535 transitions. [2022-11-03 04:07:41,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 04:07:41,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:41,518 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-03 04:07:41,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:41,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (63)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:41,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:41,932 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:41,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:41,933 INFO L85 PathProgramCache]: Analyzing trace with hash -27754915, now seen corresponding path program 1 times [2022-11-03 04:07:41,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:41,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1391472708] [2022-11-03 04:07:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:41,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:41,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:41,934 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:41,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 04:07:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:42,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 04:07:42,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 04:07:42,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:43,317 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 04:07:43,317 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:43,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1391472708] [2022-11-03 04:07:43,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1391472708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:43,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1054638627] [2022-11-03 04:07:43,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:43,318 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:43,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:07:43,322 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:07:43,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-03 04:07:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:43,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 04:07:43,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 04:07:44,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 04:07:44,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1054638627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:44,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825004531] [2022-11-03 04:07:44,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:44,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:44,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:44,511 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:44,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-03 04:07:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:44,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 04:07:44,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 04:07:45,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 04:07:45,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825004531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:45,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:07:45,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10, 10, 12, 13] total 34 [2022-11-03 04:07:45,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559477823] [2022-11-03 04:07:45,884 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:07:45,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 04:07:45,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:45,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 04:07:45,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 04:07:45,886 INFO L87 Difference]: Start difference. First operand 1200 states and 1535 transitions. Second operand has 34 states, 34 states have (on average 9.029411764705882) internal successors, (307), 34 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:49,118 INFO L93 Difference]: Finished difference Result 4368 states and 5624 transitions. [2022-11-03 04:07:49,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-03 04:07:49,119 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 9.029411764705882) internal successors, (307), 34 states have internal predecessors, (307), 0 states have call successors, (0), 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 98 [2022-11-03 04:07:49,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:49,122 INFO L225 Difference]: With dead ends: 4368 [2022-11-03 04:07:49,123 INFO L226 Difference]: Without dead ends: 3323 [2022-11-03 04:07:49,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 569 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1623, Invalid=4857, Unknown=0, NotChecked=0, Total=6480 [2022-11-03 04:07:49,125 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 1484 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:49,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1484 Valid, 1092 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 423 Invalid, 0 Unknown, 138 Unchecked, 0.5s Time] [2022-11-03 04:07:49,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2022-11-03 04:07:49,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 1262. [2022-11-03 04:07:49,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 1.2727993655828707) internal successors, (1605), 1261 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:49,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 1605 transitions. [2022-11-03 04:07:49,241 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 1605 transitions. Word has length 98 [2022-11-03 04:07:49,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:49,242 INFO L495 AbstractCegarLoop]: Abstraction has 1262 states and 1605 transitions. [2022-11-03 04:07:49,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 9.029411764705882) internal successors, (307), 34 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:49,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 1605 transitions. [2022-11-03 04:07:49,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 04:07:49,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:49,244 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:49,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:49,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-03 04:07:49,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (65)] Ended with exit code 0 [2022-11-03 04:07:49,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:49,871 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:49,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:49,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1643920227, now seen corresponding path program 1 times [2022-11-03 04:07:49,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:49,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662686416] [2022-11-03 04:07:49,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:49,872 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:49,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:49,872 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:49,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 04:07:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:50,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:07:50,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 52 proven. 24 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 04:07:50,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 52 proven. 24 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 04:07:50,987 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:50,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662686416] [2022-11-03 04:07:50,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662686416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:50,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1096461137] [2022-11-03 04:07:50,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:50,988 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:50,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:07:50,990 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:07:51,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-03 04:07:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:51,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 04:07:51,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 52 proven. 40 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:07:52,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 52 proven. 24 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 04:07:52,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1096461137] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:52,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49416637] [2022-11-03 04:07:52,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:52,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:52,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:52,748 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:52,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-03 04:07:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:52,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 04:07:52,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 52 proven. 24 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 04:07:53,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 52 proven. 24 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 04:07:53,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49416637] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:53,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:07:53,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 17, 14, 14, 14] total 46 [2022-11-03 04:07:53,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463251657] [2022-11-03 04:07:53,493 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:07:53,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-03 04:07:53,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:53,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-03 04:07:53,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1911, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 04:07:53,495 INFO L87 Difference]: Start difference. First operand 1262 states and 1605 transitions. Second operand has 46 states, 46 states have (on average 4.913043478260869) internal successors, (226), 46 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:56,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:56,564 INFO L93 Difference]: Finished difference Result 3848 states and 4873 transitions. [2022-11-03 04:07:56,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-03 04:07:56,565 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.913043478260869) internal successors, (226), 46 states have internal predecessors, (226), 0 states have call successors, (0), 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 98 [2022-11-03 04:07:56,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:56,567 INFO L225 Difference]: With dead ends: 3848 [2022-11-03 04:07:56,568 INFO L226 Difference]: Without dead ends: 2808 [2022-11-03 04:07:56,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1613, Invalid=7317, Unknown=0, NotChecked=0, Total=8930 [2022-11-03 04:07:56,570 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 1545 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1545 SdHoareTripleChecker+Valid, 1864 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:56,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1545 Valid, 1864 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 680 Invalid, 0 Unknown, 348 Unchecked, 0.7s Time] [2022-11-03 04:07:56,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2022-11-03 04:07:56,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 1262. [2022-11-03 04:07:56,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 1.2656621728786677) internal successors, (1596), 1261 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:56,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 1596 transitions. [2022-11-03 04:07:56,690 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 1596 transitions. Word has length 98 [2022-11-03 04:07:56,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:56,691 INFO L495 AbstractCegarLoop]: Abstraction has 1262 states and 1596 transitions. [2022-11-03 04:07:56,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.913043478260869) internal successors, (226), 46 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:56,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 1596 transitions. [2022-11-03 04:07:56,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 04:07:56,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:56,693 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-03 04:07:56,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:56,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (68)] Ended with exit code 0 [2022-11-03 04:07:57,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-11-03 04:07:57,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:57,307 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:57,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:57,307 INFO L85 PathProgramCache]: Analyzing trace with hash 279307807, now seen corresponding path program 1 times [2022-11-03 04:07:57,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:57,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781175178] [2022-11-03 04:07:57,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:57,308 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:57,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:57,309 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:57,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-03 04:07:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:57,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 04:07:57,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:07:59,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:08:03,162 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:03,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781175178] [2022-11-03 04:08:03,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781175178] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:03,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1553703649] [2022-11-03 04:08:03,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:03,163 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:03,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:08:03,164 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:08:03,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-03 04:08:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:03,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 04:08:03,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:08:04,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:08:05,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1553703649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:05,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866748996] [2022-11-03 04:08:05,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:05,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:05,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:08:05,520 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:08:05,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-03 04:08:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:05,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 04:08:05,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 04:08:07,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 1 proven. 90 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 04:08:08,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866748996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:08,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:08:08,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 25, 26, 26] total 50 [2022-11-03 04:08:08,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192558344] [2022-11-03 04:08:08,422 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:08:08,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-03 04:08:08,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:08,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-03 04:08:08,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2320, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 04:08:08,424 INFO L87 Difference]: Start difference. First operand 1262 states and 1596 transitions. Second operand has 50 states, 50 states have (on average 3.64) internal successors, (182), 50 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 04:08:15,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:15,513 INFO L93 Difference]: Finished difference Result 2605 states and 3300 transitions. [2022-11-03 04:08:15,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-03 04:08:15,513 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.64) internal successors, (182), 50 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 98 [2022-11-03 04:08:15,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:15,516 INFO L225 Difference]: With dead ends: 2605 [2022-11-03 04:08:15,516 INFO L226 Difference]: Without dead ends: 2603 [2022-11-03 04:08:15,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 535 SyntacticMatches, 10 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1845 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1034, Invalid=9268, Unknown=0, NotChecked=0, Total=10302 [2022-11-03 04:08:15,518 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 1046 mSDsluCounter, 4776 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 4960 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1342 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:15,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1046 Valid, 4960 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 622 Invalid, 0 Unknown, 1342 Unchecked, 0.6s Time] [2022-11-03 04:08:15,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2022-11-03 04:08:15,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 1427. [2022-11-03 04:08:15,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1426 states have (on average 1.2657784011220197) internal successors, (1805), 1426 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:15,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 1805 transitions. [2022-11-03 04:08:15,626 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 1805 transitions. Word has length 98 [2022-11-03 04:08:15,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:15,626 INFO L495 AbstractCegarLoop]: Abstraction has 1427 states and 1805 transitions. [2022-11-03 04:08:15,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.64) internal successors, (182), 50 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 04:08:15,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 1805 transitions. [2022-11-03 04:08:15,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 04:08:15,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:15,628 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-03 04:08:15,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (71)] Ended with exit code 0 [2022-11-03 04:08:15,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-03 04:08:16,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:16,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:16,232 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:16,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:16,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1866045785, now seen corresponding path program 2 times [2022-11-03 04:08:16,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:16,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448145340] [2022-11-03 04:08:16,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:16,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:16,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:16,234 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:16,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-03 04:08:16,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:16,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:16,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:08:16,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:08:16,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:08:16,782 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:16,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448145340] [2022-11-03 04:08:16,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448145340] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:16,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1225074968] [2022-11-03 04:08:16,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:16,782 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:16,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:08:16,784 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:08:16,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-11-03 04:08:17,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:17,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:17,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 04:08:17,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:08:19,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:08:24,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1225074968] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:24,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606567431] [2022-11-03 04:08:24,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:24,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:24,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:08:24,073 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:08:24,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-03 04:08:24,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:24,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:24,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:08:24,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 80 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:08:24,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 04:08:25,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606567431] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:08:25,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-11-03 04:08:25,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8, 26, 26, 10] total 69 [2022-11-03 04:08:25,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706665837] [2022-11-03 04:08:25,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:08:25,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:08:25,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:25,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:08:25,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4492, Unknown=0, NotChecked=0, Total=4692 [2022-11-03 04:08:25,059 INFO L87 Difference]: Start difference. First operand 1427 states and 1805 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:25,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:25,964 INFO L93 Difference]: Finished difference Result 4011 states and 5130 transitions. [2022-11-03 04:08:25,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 04:08:25,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 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 98 [2022-11-03 04:08:25,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:25,967 INFO L225 Difference]: With dead ends: 4011 [2022-11-03 04:08:25,967 INFO L226 Difference]: Without dead ends: 2696 [2022-11-03 04:08:25,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 523 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=271, Invalid=5735, Unknown=0, NotChecked=0, Total=6006 [2022-11-03 04:08:25,969 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 338 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:25,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 252 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:08:25,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2022-11-03 04:08:26,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 1392. [2022-11-03 04:08:26,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 1.2537742631200575) internal successors, (1744), 1391 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:26,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 1744 transitions. [2022-11-03 04:08:26,053 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 1744 transitions. Word has length 98 [2022-11-03 04:08:26,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:26,053 INFO L495 AbstractCegarLoop]: Abstraction has 1392 states and 1744 transitions. [2022-11-03 04:08:26,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:26,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 1744 transitions. [2022-11-03 04:08:26,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 04:08:26,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:26,055 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-03 04:08:26,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (74)] Ended with exit code 0 [2022-11-03 04:08:26,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-11-03 04:08:26,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:26,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:26,656 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:26,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:26,656 INFO L85 PathProgramCache]: Analyzing trace with hash -808967719, now seen corresponding path program 3 times [2022-11-03 04:08:26,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:26,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12828245] [2022-11-03 04:08:26,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:08:26,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:26,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:26,658 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:26,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-03 04:08:26,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 04:08:26,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:26,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 04:08:26,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 04:08:28,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:44,222 WARN L234 SmtUtils]: Spent 6.64s on a formula simplification. DAG size of input: 55 DAG size of output: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:08:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 04:08:45,514 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:45,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [12828245] [2022-11-03 04:08:45,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [12828245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:45,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1056798460] [2022-11-03 04:08:45,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:08:45,515 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:45,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:08:45,519 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:08:45,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2022-11-03 04:08:45,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 04:08:45,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:45,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 04:08:45,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:47,166 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 04:08:47,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 04:08:48,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1056798460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:48,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612415570] [2022-11-03 04:08:48,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:08:48,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:48,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:08:48,699 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:08:48,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-11-03 04:08:48,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 04:08:48,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:48,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 04:08:48,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 04:08:50,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 04:08:53,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612415570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:53,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:08:53,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16, 16, 16, 16] total 38 [2022-11-03 04:08:53,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614900128] [2022-11-03 04:08:53,004 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:08:53,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 04:08:53,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:53,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 04:08:53,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1296, Unknown=3, NotChecked=0, Total=1406 [2022-11-03 04:08:53,006 INFO L87 Difference]: Start difference. First operand 1392 states and 1744 transitions. Second operand has 38 states, 38 states have (on average 3.8421052631578947) internal successors, (146), 38 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:53,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:53,972 INFO L93 Difference]: Finished difference Result 1525 states and 1897 transitions. [2022-11-03 04:08:53,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 04:08:53,973 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8421052631578947) internal successors, (146), 38 states have internal predecessors, (146), 0 states have call successors, (0), 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 98 [2022-11-03 04:08:53,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:53,974 INFO L225 Difference]: With dead ends: 1525 [2022-11-03 04:08:53,974 INFO L226 Difference]: Without dead ends: 1523 [2022-11-03 04:08:53,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 544 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=145, Invalid=1744, Unknown=3, NotChecked=0, Total=1892 [2022-11-03 04:08:53,976 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 48 mSDsluCounter, 1840 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1922 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 580 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:53,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1922 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 580 Unchecked, 0.1s Time] [2022-11-03 04:08:53,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2022-11-03 04:08:54,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1439. [2022-11-03 04:08:54,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 1.2517385257301807) internal successors, (1800), 1438 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1800 transitions. [2022-11-03 04:08:54,121 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1800 transitions. Word has length 98 [2022-11-03 04:08:54,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:54,122 INFO L495 AbstractCegarLoop]: Abstraction has 1439 states and 1800 transitions. [2022-11-03 04:08:54,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8421052631578947) internal successors, (146), 38 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:54,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1800 transitions. [2022-11-03 04:08:54,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 04:08:54,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:54,124 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:08:54,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:54,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-11-03 04:08:54,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (77)] Ended with exit code 0 [2022-11-03 04:08:54,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:54,736 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:54,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:54,737 INFO L85 PathProgramCache]: Analyzing trace with hash -386265893, now seen corresponding path program 1 times [2022-11-03 04:08:54,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:54,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173617742] [2022-11-03 04:08:54,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:54,737 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:54,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:54,738 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:54,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-03 04:08:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:54,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:08:54,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 81 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:08:55,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:08:55,446 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:55,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173617742] [2022-11-03 04:08:55,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173617742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:55,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [23253552] [2022-11-03 04:08:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:55,447 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:55,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:08:55,448 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:08:55,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2022-11-03 04:08:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:55,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:08:55,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 81 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:08:56,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:08:56,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [23253552] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:56,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98818574] [2022-11-03 04:08:56,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:56,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:56,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:08:56,207 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:08:56,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-11-03 04:08:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:56,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 04:08:56,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 52 proven. 24 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 04:08:57,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 52 proven. 24 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 04:08:58,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98818574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:58,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:08:58,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 14, 14] total 34 [2022-11-03 04:08:58,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283211946] [2022-11-03 04:08:58,010 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:08:58,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 04:08:58,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:58,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 04:08:58,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1038, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 04:08:58,011 INFO L87 Difference]: Start difference. First operand 1439 states and 1800 transitions. Second operand has 34 states, 34 states have (on average 6.676470588235294) internal successors, (227), 34 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:00,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:09:00,563 INFO L93 Difference]: Finished difference Result 4018 states and 5036 transitions. [2022-11-03 04:09:00,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-03 04:09:00,563 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.676470588235294) internal successors, (227), 34 states have internal predecessors, (227), 0 states have call successors, (0), 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 98 [2022-11-03 04:09:00,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:09:00,565 INFO L225 Difference]: With dead ends: 4018 [2022-11-03 04:09:00,566 INFO L226 Difference]: Without dead ends: 2759 [2022-11-03 04:09:00,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 553 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=369, Invalid=3663, Unknown=0, NotChecked=0, Total=4032 [2022-11-03 04:09:00,567 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 670 mSDsluCounter, 3283 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 3448 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:09:00,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 3448 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 641 Invalid, 0 Unknown, 126 Unchecked, 0.9s Time] [2022-11-03 04:09:00,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2022-11-03 04:09:00,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 1478. [2022-11-03 04:09:00,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 1.2477995937711577) internal successors, (1843), 1477 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:00,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 1843 transitions. [2022-11-03 04:09:00,714 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 1843 transitions. Word has length 98 [2022-11-03 04:09:00,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:09:00,714 INFO L495 AbstractCegarLoop]: Abstraction has 1478 states and 1843 transitions. [2022-11-03 04:09:00,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.676470588235294) internal successors, (227), 34 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:00,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 1843 transitions. [2022-11-03 04:09:00,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 04:09:00,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:00,716 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-03 04:09:00,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Forceful destruction successful, exit code 0 [2022-11-03 04:09:00,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-11-03 04:09:01,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-03 04:09:01,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:09:01,321 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:01,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:01,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1466215913, now seen corresponding path program 2 times [2022-11-03 04:09:01,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:09:01,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [439634048] [2022-11-03 04:09:01,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:09:01,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:09:01,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:09:01,323 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:09:01,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-03 04:09:01,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:09:01,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:09:01,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:09:01,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:09:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 82 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:09:01,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:09:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:09:02,002 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:09:02,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [439634048] [2022-11-03 04:09:02,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [439634048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:09:02,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [419138034] [2022-11-03 04:09:02,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:09:02,003 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:09:02,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:09:02,004 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:09:02,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process [2022-11-03 04:09:02,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:09:02,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:09:02,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:09:02,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:09:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 82 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:09:02,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:09:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:09:02,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [419138034] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:09:02,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055087236] [2022-11-03 04:09:02,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:09:02,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:09:02,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:09:02,670 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:09:02,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-11-03 04:09:02,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:09:02,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:09:02,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 04:09:02,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:09:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-03 04:09:02,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:09:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 04:09:02,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055087236] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:09:02,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-11-03 04:09:02,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8, 8, 8, 7] total 17 [2022-11-03 04:09:02,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348728126] [2022-11-03 04:09:02,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:09:02,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:09:02,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:09:02,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:09:03,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:09:03,000 INFO L87 Difference]: Start difference. First operand 1478 states and 1843 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:03,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:09:03,285 INFO L93 Difference]: Finished difference Result 4205 states and 5257 transitions. [2022-11-03 04:09:03,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:09:03,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 04:09:03,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:09:03,288 INFO L225 Difference]: With dead ends: 4205 [2022-11-03 04:09:03,289 INFO L226 Difference]: Without dead ends: 2977 [2022-11-03 04:09:03,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 567 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:09:03,290 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 111 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:09:03,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 204 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:09:03,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2977 states. [2022-11-03 04:09:03,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2977 to 1580. [2022-11-03 04:09:03,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 1.2438252058264725) internal successors, (1964), 1579 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:03,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 1964 transitions. [2022-11-03 04:09:03,417 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 1964 transitions. Word has length 98 [2022-11-03 04:09:03,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:09:03,417 INFO L495 AbstractCegarLoop]: Abstraction has 1580 states and 1964 transitions. [2022-11-03 04:09:03,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:03,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 1964 transitions. [2022-11-03 04:09:03,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 04:09:03,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:03,419 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-03 04:09:03,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-03 04:09:03,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-11-03 04:09:03,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (83)] Forceful destruction successful, exit code 0 [2022-11-03 04:09:04,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:09:04,034 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:04,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:04,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1240403481, now seen corresponding path program 3 times [2022-11-03 04:09:04,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:09:04,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [908696370] [2022-11-03 04:09:04,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:09:04,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:09:04,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:09:04,036 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:09:04,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-03 04:09:04,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 04:09:04,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:09:04,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:09:04,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:09:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 04:09:04,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:09:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-03 04:09:04,253 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:09:04,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [908696370] [2022-11-03 04:09:04,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [908696370] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:09:04,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:09:04,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-03 04:09:04,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066664761] [2022-11-03 04:09:04,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:09:04,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:09:04,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:09:04,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:09:04,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:09:04,255 INFO L87 Difference]: Start difference. First operand 1580 states and 1964 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:04,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:09:04,469 INFO L93 Difference]: Finished difference Result 3583 states and 4474 transitions. [2022-11-03 04:09:04,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:09:04,470 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 04:09:04,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:09:04,472 INFO L225 Difference]: With dead ends: 3583 [2022-11-03 04:09:04,472 INFO L226 Difference]: Without dead ends: 2263 [2022-11-03 04:09:04,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:09:04,474 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 82 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:09:04,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 203 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:09:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2022-11-03 04:09:04,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 1608. [2022-11-03 04:09:04,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 1.240821406347231) internal successors, (1994), 1607 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:04,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 1994 transitions. [2022-11-03 04:09:04,578 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 1994 transitions. Word has length 98 [2022-11-03 04:09:04,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:09:04,578 INFO L495 AbstractCegarLoop]: Abstraction has 1608 states and 1994 transitions. [2022-11-03 04:09:04,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:04,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 1994 transitions. [2022-11-03 04:09:04,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 04:09:04,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:04,580 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-03 04:09:04,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-03 04:09:04,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:09:04,781 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:04,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:04,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1941468059, now seen corresponding path program 4 times [2022-11-03 04:09:04,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:09:04,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293163789] [2022-11-03 04:09:04,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:09:04,782 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:09:04,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:09:04,783 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:09:04,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-03 04:09:04,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:09:04,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:09:04,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:09:04,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:09:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 82 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:09:05,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:09:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:09:05,497 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:09:05,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293163789] [2022-11-03 04:09:05,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [293163789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:09:05,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1994390213] [2022-11-03 04:09:05,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:09:05,497 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:09:05,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:09:05,498 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:09:05,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (87)] Waiting until timeout for monitored process [2022-11-03 04:09:05,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:09:05,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:09:05,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:09:05,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:09:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 82 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:09:06,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:09:06,221 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:09:06,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1994390213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:09:06,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7288200] [2022-11-03 04:09:06,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:09:06,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:09:06,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:09:06,222 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:09:06,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-11-03 04:09:06,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:09:06,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:09:06,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 04:09:06,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:09:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 79 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:09:06,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:09:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:09:06,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7288200] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:09:06,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:09:06,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 10, 10] total 16 [2022-11-03 04:09:06,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253251279] [2022-11-03 04:09:06,913 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:09:06,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 04:09:06,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:09:06,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 04:09:06,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:09:06,915 INFO L87 Difference]: Start difference. First operand 1608 states and 1994 transitions. Second operand has 16 states, 16 states have (on average 7.4375) internal successors, (119), 16 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:07,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:09:07,421 INFO L93 Difference]: Finished difference Result 2937 states and 3672 transitions. [2022-11-03 04:09:07,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 04:09:07,421 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.4375) internal successors, (119), 16 states have internal predecessors, (119), 0 states have call successors, (0), 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 98 [2022-11-03 04:09:07,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:09:07,423 INFO L225 Difference]: With dead ends: 2937 [2022-11-03 04:09:07,423 INFO L226 Difference]: Without dead ends: 1587 [2022-11-03 04:09:07,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 567 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=578, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:09:07,424 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 375 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:09:07,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 343 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 55 Invalid, 0 Unknown, 70 Unchecked, 0.1s Time] [2022-11-03 04:09:07,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2022-11-03 04:09:07,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1566. [2022-11-03 04:09:07,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 1.2434504792332268) internal successors, (1946), 1565 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:07,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 1946 transitions. [2022-11-03 04:09:07,558 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 1946 transitions. Word has length 98 [2022-11-03 04:09:07,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:09:07,558 INFO L495 AbstractCegarLoop]: Abstraction has 1566 states and 1946 transitions. [2022-11-03 04:09:07,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.4375) internal successors, (119), 16 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:07,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 1946 transitions. [2022-11-03 04:09:07,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 04:09:07,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:07,560 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-03 04:09:07,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-11-03 04:09:07,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (87)] Ended with exit code 0 [2022-11-03 04:09:07,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Ended with exit code 0 [2022-11-03 04:09:08,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:09:08,182 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:08,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:08,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2026475657, now seen corresponding path program 1 times [2022-11-03 04:09:08,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:09:08,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135480302] [2022-11-03 04:09:08,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:09:08,183 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:09:08,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:09:08,184 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:09:08,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-03 04:09:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:09:08,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 04:09:08,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:09:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:09,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:09:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:12,169 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:09:12,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135480302] [2022-11-03 04:09:12,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135480302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:09:12,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1354448301] [2022-11-03 04:09:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:09:12,170 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:09:12,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:09:12,170 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:09:12,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (90)] Waiting until timeout for monitored process [2022-11-03 04:09:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:09:12,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 04:09:12,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:09:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:14,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:09:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:14,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1354448301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:09:14,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012066920] [2022-11-03 04:09:14,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:09:14,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:09:14,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:09:14,750 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:09:14,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-11-03 04:09:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:09:14,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 04:09:14,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:09:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 52 proven. 28 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 04:09:16,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:09:18,902 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 52 proven. 28 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 04:09:18,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012066920] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:09:18,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:09:18,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 27, 25, 15, 15] total 82 [2022-11-03 04:09:18,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313363525] [2022-11-03 04:09:18,903 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:09:18,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-03 04:09:18,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:09:18,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-03 04:09:18,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=6416, Unknown=0, NotChecked=0, Total=6642 [2022-11-03 04:09:18,906 INFO L87 Difference]: Start difference. First operand 1566 states and 1946 transitions. Second operand has 82 states, 82 states have (on average 3.6219512195121952) internal successors, (297), 82 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:59,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:16:59,701 INFO L93 Difference]: Finished difference Result 20920 states and 25235 transitions. [2022-11-03 04:16:59,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1600 states. [2022-11-03 04:16:59,702 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.6219512195121952) internal successors, (297), 82 states have internal predecessors, (297), 0 states have call successors, (0), 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 98 [2022-11-03 04:16:59,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:16:59,713 INFO L225 Difference]: With dead ends: 20920 [2022-11-03 04:16:59,714 INFO L226 Difference]: Without dead ends: 19588 [2022-11-03 04:16:59,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2180 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 1678 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364161 ImplicationChecksByTransitivity, 437.4s TimeCoverageRelationStatistics Valid=193275, Invalid=2627445, Unknown=0, NotChecked=0, Total=2820720 [2022-11-03 04:16:59,889 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 20438 mSDsluCounter, 12282 mSDsCounter, 0 mSdLazyCounter, 12310 mSolverCounterSat, 5164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20438 SdHoareTripleChecker+Valid, 12524 SdHoareTripleChecker+Invalid, 17474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5164 IncrementalHoareTripleChecker+Valid, 12310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:16:59,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20438 Valid, 12524 Invalid, 17474 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5164 Valid, 12310 Invalid, 0 Unknown, 0 Unchecked, 21.9s Time] [2022-11-03 04:16:59,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19588 states. [2022-11-03 04:17:00,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19588 to 1886. [2022-11-03 04:17:00,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 1.2360742705570291) internal successors, (2330), 1885 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:17:00,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 2330 transitions. [2022-11-03 04:17:00,121 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 2330 transitions. Word has length 98 [2022-11-03 04:17:00,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:17:00,122 INFO L495 AbstractCegarLoop]: Abstraction has 1886 states and 2330 transitions. [2022-11-03 04:17:00,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.6219512195121952) internal successors, (297), 82 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:17:00,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 2330 transitions. [2022-11-03 04:17:00,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 04:17:00,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:17:00,123 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, 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] [2022-11-03 04:17:00,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (90)] Ended with exit code 0 [2022-11-03 04:17:00,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-11-03 04:17:00,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2022-11-03 04:17:00,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:17:00,724 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:17:00,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:17:00,724 INFO L85 PathProgramCache]: Analyzing trace with hash 200238995, now seen corresponding path program 1 times [2022-11-03 04:17:00,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:17:00,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272604981] [2022-11-03 04:17:00,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:17:00,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:17:00,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:17:00,725 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:17:00,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-03 04:17:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:17:00,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 04:17:00,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:17:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:17:02,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:17:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:17:04,544 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:17:04,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272604981] [2022-11-03 04:17:04,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272604981] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:17:04,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [588016578] [2022-11-03 04:17:04,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:17:04,545 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:17:04,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:17:04,546 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:17:04,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2022-11-03 04:17:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:17:04,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 04:17:04,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:17:06,913 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 04:17:06,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:17:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 04:17:10,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [588016578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:17:10,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821756353] [2022-11-03 04:17:10,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:17:10,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:17:10,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:17:10,554 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:17:10,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff55aa6b-bb3a-415f-83ed-00c23971e2e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-11-03 04:17:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:17:10,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 04:17:10,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:17:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 04:17:12,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:17:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 04:17:15,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821756353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:17:15,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:17:15,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 15, 15, 15, 15] total 97 [2022-11-03 04:17:15,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073347088] [2022-11-03 04:17:15,231 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:17:15,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-03 04:17:15,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:17:15,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-03 04:17:15,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=9070, Unknown=0, NotChecked=0, Total=9312 [2022-11-03 04:17:15,234 INFO L87 Difference]: Start difference. First operand 1886 states and 2330 transitions. Second operand has 97 states, 97 states have (on average 4.546391752577319) internal successors, (441), 97 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)