./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/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_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/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 32bit --witnessprinter.graph.data.programhash a41d14195dc7825ea8ff849a910a7045aa33d6087daf5af287d6c34e44b1032a --- 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 01:49:07,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:49:07,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:49:07,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:49:07,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:49:07,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:49:07,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:49:07,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:49:07,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:49:07,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:49:07,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:49:07,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:49:07,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:49:07,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:49:07,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:49:07,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:49:07,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:49:07,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:49:07,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:49:07,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:49:07,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:49:07,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:49:07,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:49:07,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:49:07,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:49:07,492 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:49:07,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:49:07,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:49:07,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:49:07,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:49:07,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:49:07,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:49:07,500 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:49:07,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:49:07,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:49:07,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:49:07,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:49:07,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:49:07,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:49:07,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:49:07,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:49:07,508 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:49:07,541 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:49:07,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:49:07,541 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:49:07,541 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:49:07,542 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:49:07,542 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:49:07,543 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:49:07,543 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:49:07,543 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:49:07,543 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:49:07,544 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:49:07,544 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:49:07,544 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:49:07,544 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:49:07,544 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:49:07,545 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:49:07,545 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:49:07,545 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:49:07,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:49:07,546 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:49:07,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:49:07,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:49:07,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:49:07,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:49:07,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:49:07,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:49:07,548 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:49:07,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:49:07,548 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:49:07,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:49:07,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:49:07,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:49:07,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:49:07,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:49:07,550 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:49:07,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:49:07,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:49:07,550 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:49:07,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:49:07,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:49:07,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:49:07,551 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_c1606573-9d37-490e-bd35-60a8c3fe607e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a41d14195dc7825ea8ff849a910a7045aa33d6087daf5af287d6c34e44b1032a [2022-11-03 01:49:07,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:49:07,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:49:07,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:49:07,912 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:49:07,913 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:49:07,914 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c [2022-11-03 01:49:08,011 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/data/37e950891/3d223dafc5704ed5a410fa9688d083a2/FLAG09f10c8fe [2022-11-03 01:49:08,588 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:49:08,589 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c [2022-11-03 01:49:08,605 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/data/37e950891/3d223dafc5704ed5a410fa9688d083a2/FLAG09f10c8fe [2022-11-03 01:49:08,868 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/data/37e950891/3d223dafc5704ed5a410fa9688d083a2 [2022-11-03 01:49:08,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:49:08,872 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:49:08,874 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:49:08,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:49:08,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:49:08,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:49:08" (1/1) ... [2022-11-03 01:49:08,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d1ddbee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:08, skipping insertion in model container [2022-11-03 01:49:08,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:49:08" (1/1) ... [2022-11-03 01:49:08,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:49:08,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:49:09,171 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_c1606573-9d37-490e-bd35-60a8c3fe607e/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c[914,927] [2022-11-03 01:49:09,232 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_c1606573-9d37-490e-bd35-60a8c3fe607e/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c[7115,7128] [2022-11-03 01:49:09,435 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:49:09,460 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:49:09,480 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_c1606573-9d37-490e-bd35-60a8c3fe607e/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c[914,927] [2022-11-03 01:49:09,512 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_c1606573-9d37-490e-bd35-60a8c3fe607e/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c[7115,7128] [2022-11-03 01:49:09,622 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:49:09,670 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:49:09,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09 WrapperNode [2022-11-03 01:49:09,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:49:09,672 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:49:09,673 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:49:09,673 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:49:09,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (1/1) ... [2022-11-03 01:49:09,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (1/1) ... [2022-11-03 01:49:09,754 INFO L138 Inliner]: procedures = 77, calls = 94, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 1045 [2022-11-03 01:49:09,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:49:09,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:49:09,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:49:09,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:49:09,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (1/1) ... [2022-11-03 01:49:09,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (1/1) ... [2022-11-03 01:49:09,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (1/1) ... [2022-11-03 01:49:09,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (1/1) ... [2022-11-03 01:49:09,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (1/1) ... [2022-11-03 01:49:09,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (1/1) ... [2022-11-03 01:49:09,813 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (1/1) ... [2022-11-03 01:49:09,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (1/1) ... [2022-11-03 01:49:09,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:49:09,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:49:09,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:49:09,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:49:09,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (1/1) ... [2022-11-03 01:49:09,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:49:09,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:09,862 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:49:09,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:49:09,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:49:09,914 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 01:49:09,915 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 01:49:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-03 01:49:09,915 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-03 01:49:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-03 01:49:09,915 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-03 01:49:09,917 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-03 01:49:09,917 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-03 01:49:09,917 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-03 01:49:09,917 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-03 01:49:09,918 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-03 01:49:09,918 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-03 01:49:09,918 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-03 01:49:09,918 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-03 01:49:09,919 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-03 01:49:09,919 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-03 01:49:09,919 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-03 01:49:09,919 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-03 01:49:09,920 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-03 01:49:09,920 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-03 01:49:09,920 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-03 01:49:09,920 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-03 01:49:09,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:49:09,921 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-03 01:49:09,922 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-03 01:49:09,922 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-03 01:49:09,924 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-03 01:49:09,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:49:09,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:49:09,925 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-03 01:49:09,925 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-03 01:49:09,926 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-03 01:49:09,926 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-03 01:49:10,188 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:49:10,212 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:49:11,435 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:49:12,264 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:49:12,265 INFO L300 CfgBuilder]: Removed 19 assume(true) statements. [2022-11-03 01:49:12,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:49:12 BoogieIcfgContainer [2022-11-03 01:49:12,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:49:12,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:49:12,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:49:12,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:49:12,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:49:08" (1/3) ... [2022-11-03 01:49:12,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208aaa5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:49:12, skipping insertion in model container [2022-11-03 01:49:12,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:09" (2/3) ... [2022-11-03 01:49:12,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208aaa5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:49:12, skipping insertion in model container [2022-11-03 01:49:12,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:49:12" (3/3) ... [2022-11-03 01:49:12,291 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.12.cil-1.c [2022-11-03 01:49:12,317 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:49:12,318 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 01:49:12,433 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:49:12,453 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;@7687f9b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:49:12,458 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 01:49:12,465 INFO L276 IsEmpty]: Start isEmpty. Operand has 266 states, 206 states have (on average 1.5485436893203883) internal successors, (319), 214 states have internal predecessors, (319), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2022-11-03 01:49:12,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 01:49:12,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:12,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:12,489 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:12,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:12,498 INFO L85 PathProgramCache]: Analyzing trace with hash 352805456, now seen corresponding path program 1 times [2022-11-03 01:49:12,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:12,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14623127] [2022-11-03 01:49:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:12,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:12,930 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 01:49:12,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:12,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14623127] [2022-11-03 01:49:12,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14623127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:12,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:12,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:49:12,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289062705] [2022-11-03 01:49:12,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:12,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:49:12,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:12,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:49:12,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:49:12,996 INFO L87 Difference]: Start difference. First operand has 266 states, 206 states have (on average 1.5485436893203883) internal successors, (319), 214 states have internal predecessors, (319), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 01:49:13,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:13,501 INFO L93 Difference]: Finished difference Result 582 states and 877 transitions. [2022-11-03 01:49:13,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:49:13,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-03 01:49:13,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:13,518 INFO L225 Difference]: With dead ends: 582 [2022-11-03 01:49:13,518 INFO L226 Difference]: Without dead ends: 320 [2022-11-03 01:49:13,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:49:13,528 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 449 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:13,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 660 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:49:13,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-03 01:49:13,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 313. [2022-11-03 01:49:13,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 241 states have (on average 1.4605809128630705) internal successors, (352), 246 states have internal predecessors, (352), 50 states have call successors, (50), 22 states have call predecessors, (50), 20 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-03 01:49:13,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 448 transitions. [2022-11-03 01:49:13,641 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 448 transitions. Word has length 45 [2022-11-03 01:49:13,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:13,642 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 448 transitions. [2022-11-03 01:49:13,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 01:49:13,642 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 448 transitions. [2022-11-03 01:49:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 01:49:13,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:13,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:13,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:49:13,647 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:13,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:13,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1271780079, now seen corresponding path program 1 times [2022-11-03 01:49:13,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:13,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070856117] [2022-11-03 01:49:13,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:13,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:13,814 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 01:49:13,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:13,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070856117] [2022-11-03 01:49:13,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070856117] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:13,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:13,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:49:13,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27391634] [2022-11-03 01:49:13,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:13,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:49:13,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:13,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:49:13,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:49:13,820 INFO L87 Difference]: Start difference. First operand 313 states and 448 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 01:49:14,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:14,678 INFO L93 Difference]: Finished difference Result 715 states and 951 transitions. [2022-11-03 01:49:14,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:14,679 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-03 01:49:14,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:14,686 INFO L225 Difference]: With dead ends: 715 [2022-11-03 01:49:14,686 INFO L226 Difference]: Without dead ends: 583 [2022-11-03 01:49:14,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:49:14,689 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 920 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:14,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 1165 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:49:14,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-11-03 01:49:14,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 499. [2022-11-03 01:49:14,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 373 states have (on average 1.3726541554959786) internal successors, (512), 379 states have internal predecessors, (512), 77 states have call successors, (77), 45 states have call predecessors, (77), 47 states have return successors, (77), 76 states have call predecessors, (77), 73 states have call successors, (77) [2022-11-03 01:49:14,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 666 transitions. [2022-11-03 01:49:14,762 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 666 transitions. Word has length 45 [2022-11-03 01:49:14,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:14,763 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 666 transitions. [2022-11-03 01:49:14,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 01:49:14,764 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 666 transitions. [2022-11-03 01:49:14,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 01:49:14,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:14,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:14,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:49:14,766 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:14,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:14,767 INFO L85 PathProgramCache]: Analyzing trace with hash -564192389, now seen corresponding path program 1 times [2022-11-03 01:49:14,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:14,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520453283] [2022-11-03 01:49:14,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:14,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:14,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:15,187 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 01:49:15,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:15,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520453283] [2022-11-03 01:49:15,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520453283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:15,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:15,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:49:15,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881275553] [2022-11-03 01:49:15,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:15,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:49:15,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:15,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:49:15,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:15,191 INFO L87 Difference]: Start difference. First operand 499 states and 666 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-03 01:49:16,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:16,427 INFO L93 Difference]: Finished difference Result 1015 states and 1282 transitions. [2022-11-03 01:49:16,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:49:16,428 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-03 01:49:16,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:16,437 INFO L225 Difference]: With dead ends: 1015 [2022-11-03 01:49:16,438 INFO L226 Difference]: Without dead ends: 713 [2022-11-03 01:49:16,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:49:16,451 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 540 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:16,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 1233 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 01:49:16,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-11-03 01:49:16,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 678. [2022-11-03 01:49:16,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 498 states have (on average 1.3333333333333333) internal successors, (664), 505 states have internal predecessors, (664), 104 states have call successors, (104), 68 states have call predecessors, (104), 74 states have return successors, (108), 106 states have call predecessors, (108), 100 states have call successors, (108) [2022-11-03 01:49:16,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 876 transitions. [2022-11-03 01:49:16,537 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 876 transitions. Word has length 46 [2022-11-03 01:49:16,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:16,538 INFO L495 AbstractCegarLoop]: Abstraction has 678 states and 876 transitions. [2022-11-03 01:49:16,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-03 01:49:16,538 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 876 transitions. [2022-11-03 01:49:16,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 01:49:16,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:16,540 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:16,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:49:16,541 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:16,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:16,542 INFO L85 PathProgramCache]: Analyzing trace with hash 372409467, now seen corresponding path program 1 times [2022-11-03 01:49:16,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:16,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523061111] [2022-11-03 01:49:16,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:16,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:16,633 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 01:49:16,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:16,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523061111] [2022-11-03 01:49:16,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523061111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:16,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:16,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:49:16,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509540908] [2022-11-03 01:49:16,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:16,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:49:16,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:16,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:49:16,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:49:16,637 INFO L87 Difference]: Start difference. First operand 678 states and 876 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:49:16,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:16,873 INFO L93 Difference]: Finished difference Result 1242 states and 1546 transitions. [2022-11-03 01:49:16,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:49:16,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-03 01:49:16,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:16,879 INFO L225 Difference]: With dead ends: 1242 [2022-11-03 01:49:16,879 INFO L226 Difference]: Without dead ends: 810 [2022-11-03 01:49:16,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:49:16,882 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 67 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:16,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 634 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:16,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-11-03 01:49:17,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 705. [2022-11-03 01:49:17,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 521 states have (on average 1.3224568138195778) internal successors, (689), 528 states have internal predecessors, (689), 106 states have call successors, (106), 70 states have call predecessors, (106), 76 states have return successors, (110), 108 states have call predecessors, (110), 102 states have call successors, (110) [2022-11-03 01:49:17,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 905 transitions. [2022-11-03 01:49:17,018 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 905 transitions. Word has length 47 [2022-11-03 01:49:17,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:17,021 INFO L495 AbstractCegarLoop]: Abstraction has 705 states and 905 transitions. [2022-11-03 01:49:17,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:49:17,021 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 905 transitions. [2022-11-03 01:49:17,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 01:49:17,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:17,029 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:17,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:49:17,033 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:17,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:17,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2054591826, now seen corresponding path program 1 times [2022-11-03 01:49:17,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:17,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444269102] [2022-11-03 01:49:17,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:17,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:49:17,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:17,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444269102] [2022-11-03 01:49:17,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444269102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:17,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:17,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:49:17,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97507005] [2022-11-03 01:49:17,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:17,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:49:17,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:17,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:49:17,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:49:17,146 INFO L87 Difference]: Start difference. First operand 705 states and 905 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:49:17,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:17,309 INFO L93 Difference]: Finished difference Result 895 states and 1126 transitions. [2022-11-03 01:49:17,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:49:17,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-11-03 01:49:17,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:17,315 INFO L225 Difference]: With dead ends: 895 [2022-11-03 01:49:17,315 INFO L226 Difference]: Without dead ends: 622 [2022-11-03 01:49:17,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:49:17,322 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 354 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:17,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 395 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:17,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-11-03 01:49:17,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 513. [2022-11-03 01:49:17,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 381 states have (on average 1.330708661417323) internal successors, (507), 386 states have internal predecessors, (507), 82 states have call successors, (82), 50 states have call predecessors, (82), 48 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-03 01:49:17,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 667 transitions. [2022-11-03 01:49:17,393 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 667 transitions. Word has length 53 [2022-11-03 01:49:17,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:17,395 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 667 transitions. [2022-11-03 01:49:17,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:49:17,395 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 667 transitions. [2022-11-03 01:49:17,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 01:49:17,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:17,398 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:17,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 01:49:17,398 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:17,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:17,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1589350809, now seen corresponding path program 1 times [2022-11-03 01:49:17,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:17,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332373321] [2022-11-03 01:49:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:17,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:17,575 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 01:49:17,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:17,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332373321] [2022-11-03 01:49:17,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332373321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:17,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:17,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:49:17,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20159964] [2022-11-03 01:49:17,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:17,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:49:17,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:17,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:49:17,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:49:17,580 INFO L87 Difference]: Start difference. First operand 513 states and 667 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 01:49:17,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:17,979 INFO L93 Difference]: Finished difference Result 616 states and 783 transitions. [2022-11-03 01:49:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:49:17,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-03 01:49:17,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:17,985 INFO L225 Difference]: With dead ends: 616 [2022-11-03 01:49:17,985 INFO L226 Difference]: Without dead ends: 613 [2022-11-03 01:49:17,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 01:49:17,989 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 641 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:17,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [641 Valid, 371 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:49:17,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-11-03 01:49:18,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 512. [2022-11-03 01:49:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 381 states have (on average 1.3228346456692914) internal successors, (504), 385 states have internal predecessors, (504), 81 states have call successors, (81), 50 states have call predecessors, (81), 48 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-03 01:49:18,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 663 transitions. [2022-11-03 01:49:18,060 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 663 transitions. Word has length 54 [2022-11-03 01:49:18,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:18,061 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 663 transitions. [2022-11-03 01:49:18,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 01:49:18,061 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 663 transitions. [2022-11-03 01:49:18,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 01:49:18,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:18,063 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:18,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 01:49:18,063 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:18,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:18,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2023773284, now seen corresponding path program 1 times [2022-11-03 01:49:18,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:18,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195320499] [2022-11-03 01:49:18,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:18,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:18,255 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 01:49:18,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:18,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195320499] [2022-11-03 01:49:18,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195320499] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:18,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374903621] [2022-11-03 01:49:18,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:18,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:18,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:18,262 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:18,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:49:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:18,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:49:18,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:18,925 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 01:49:18,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:19,153 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 01:49:19,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374903621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:19,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1150960499] [2022-11-03 01:49:19,186 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-03 01:49:19,187 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:49:19,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:49:19,197 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:49:19,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:49:29,303 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 205 for LOIs [2022-11-03 01:49:29,340 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 201 for LOIs [2022-11-03 01:49:29,368 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 209 for LOIs [2022-11-03 01:49:30,386 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 205 for LOIs [2022-11-03 01:49:30,484 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 205 for LOIs [2022-11-03 01:49:30,575 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 205 for LOIs [2022-11-03 01:49:30,643 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 212 for LOIs [2022-11-03 01:49:30,687 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:50:06,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1150960499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:06,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:50:06,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [5, 5, 4] total 44 [2022-11-03 01:50:06,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49031492] [2022-11-03 01:50:06,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:06,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 01:50:06,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:06,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 01:50:06,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 01:50:06,782 INFO L87 Difference]: Start difference. First operand 512 states and 663 transitions. Second operand has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 01:50:56,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:56,087 INFO L93 Difference]: Finished difference Result 876 states and 1074 transitions. [2022-11-03 01:50:56,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-03 01:50:56,091 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-11-03 01:50:56,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:56,095 INFO L225 Difference]: With dead ends: 876 [2022-11-03 01:50:56,095 INFO L226 Difference]: Without dead ends: 561 [2022-11-03 01:50:56,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 67.8s TimeCoverageRelationStatistics Valid=620, Invalid=4492, Unknown=0, NotChecked=0, Total=5112 [2022-11-03 01:50:56,099 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 198 mSDsluCounter, 2860 mSDsCounter, 0 mSdLazyCounter, 6573 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 3076 SdHoareTripleChecker+Invalid, 6800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 6573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:56,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 3076 Invalid, 6800 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [227 Valid, 6573 Invalid, 0 Unknown, 0 Unchecked, 17.2s Time] [2022-11-03 01:50:56,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-11-03 01:50:56,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 546. [2022-11-03 01:50:56,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 407 states have (on average 1.307125307125307) internal successors, (532), 411 states have internal predecessors, (532), 83 states have call successors, (83), 56 states have call predecessors, (83), 54 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2022-11-03 01:50:56,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 695 transitions. [2022-11-03 01:50:56,212 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 695 transitions. Word has length 55 [2022-11-03 01:50:56,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:56,212 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 695 transitions. [2022-11-03 01:50:56,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 01:50:56,213 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 695 transitions. [2022-11-03 01:50:56,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 01:50:56,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:56,215 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:56,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:56,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 01:50:56,431 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:56,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:56,432 INFO L85 PathProgramCache]: Analyzing trace with hash -818940411, now seen corresponding path program 1 times [2022-11-03 01:50:56,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:56,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334613871] [2022-11-03 01:50:56,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:56,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:50:56,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:56,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334613871] [2022-11-03 01:50:56,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334613871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:56,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:56,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:50:56,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111250852] [2022-11-03 01:50:56,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:56,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:50:56,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:56,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:50:56,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:50:56,504 INFO L87 Difference]: Start difference. First operand 546 states and 695 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 01:50:56,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:56,796 INFO L93 Difference]: Finished difference Result 827 states and 1017 transitions. [2022-11-03 01:50:56,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:50:56,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-03 01:50:56,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:56,801 INFO L225 Difference]: With dead ends: 827 [2022-11-03 01:50:56,802 INFO L226 Difference]: Without dead ends: 658 [2022-11-03 01:50:56,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:50:56,804 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 42 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:56,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 673 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:50:56,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-11-03 01:50:56,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 581. [2022-11-03 01:50:56,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 436 states have (on average 1.3027522935779816) internal successors, (568), 440 states have internal predecessors, (568), 86 states have call successors, (86), 59 states have call predecessors, (86), 57 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-11-03 01:50:56,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 737 transitions. [2022-11-03 01:50:56,959 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 737 transitions. Word has length 61 [2022-11-03 01:50:56,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:56,960 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 737 transitions. [2022-11-03 01:50:56,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 01:50:56,960 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 737 transitions. [2022-11-03 01:50:56,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 01:50:56,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:56,962 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:56,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 01:50:56,962 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:56,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:56,963 INFO L85 PathProgramCache]: Analyzing trace with hash 999672754, now seen corresponding path program 1 times [2022-11-03 01:50:56,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:56,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257948988] [2022-11-03 01:50:56,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:56,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:50:57,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:57,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257948988] [2022-11-03 01:50:57,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257948988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:57,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:57,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:50:57,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162093376] [2022-11-03 01:50:57,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:57,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:50:57,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:57,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:50:57,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:50:57,217 INFO L87 Difference]: Start difference. First operand 581 states and 737 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:50:58,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:58,418 INFO L93 Difference]: Finished difference Result 1044 states and 1263 transitions. [2022-11-03 01:50:58,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:50:58,419 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2022-11-03 01:50:58,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:58,424 INFO L225 Difference]: With dead ends: 1044 [2022-11-03 01:50:58,425 INFO L226 Difference]: Without dead ends: 741 [2022-11-03 01:50:58,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:50:58,427 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 524 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:58,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 1190 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 01:50:58,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-11-03 01:50:58,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 720. [2022-11-03 01:50:58,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 530 states have (on average 1.2660377358490567) internal successors, (671), 534 states have internal predecessors, (671), 110 states have call successors, (110), 80 states have call predecessors, (110), 78 states have return successors, (107), 107 states have call predecessors, (107), 107 states have call successors, (107) [2022-11-03 01:50:58,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 888 transitions. [2022-11-03 01:50:58,613 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 888 transitions. Word has length 63 [2022-11-03 01:50:58,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:58,614 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 888 transitions. [2022-11-03 01:50:58,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:50:58,615 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 888 transitions. [2022-11-03 01:50:58,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-03 01:50:58,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:58,616 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:58,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 01:50:58,617 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:58,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:58,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1542374705, now seen corresponding path program 1 times [2022-11-03 01:50:58,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:58,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877977459] [2022-11-03 01:50:58,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:58,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:58,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:50:58,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:58,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877977459] [2022-11-03 01:50:58,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877977459] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:50:58,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83475331] [2022-11-03 01:50:58,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:58,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:58,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:58,854 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:58,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:50:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:59,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:50:59,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:50:59,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:50:59,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83475331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:59,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [313461384] [2022-11-03 01:50:59,577 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-03 01:50:59,577 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:50:59,578 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:50:59,578 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:50:59,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:51:20,410 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 205 for LOIs [2022-11-03 01:51:20,444 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 171 for LOIs [2022-11-03 01:51:20,477 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 324 for LOIs [2022-11-03 01:51:20,648 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 209 for LOIs [2022-11-03 01:51:21,395 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 205 for LOIs [2022-11-03 01:51:21,479 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 205 for LOIs [2022-11-03 01:51:21,562 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 205 for LOIs [2022-11-03 01:51:21,592 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 212 for LOIs [2022-11-03 01:51:21,627 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:52:07,992 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19901#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-03 01:52:07,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:52:07,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:52:07,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-03 01:52:07,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684946515] [2022-11-03 01:52:07,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:07,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:52:07,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:07,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:52:07,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 01:52:07,995 INFO L87 Difference]: Start difference. First operand 720 states and 888 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-03 01:52:08,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:08,853 INFO L93 Difference]: Finished difference Result 1814 states and 2129 transitions. [2022-11-03 01:52:08,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:52:08,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2022-11-03 01:52:08,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:08,863 INFO L225 Difference]: With dead ends: 1814 [2022-11-03 01:52:08,863 INFO L226 Difference]: Without dead ends: 1811 [2022-11-03 01:52:08,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 146 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 46.4s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 01:52:08,866 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 855 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:08,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 1347 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:52:08,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2022-11-03 01:52:09,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1234. [2022-11-03 01:52:09,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 886 states have (on average 1.2302483069977426) internal successors, (1090), 890 states have internal predecessors, (1090), 194 states have call successors, (194), 154 states have call predecessors, (194), 152 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2022-11-03 01:52:09,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1475 transitions. [2022-11-03 01:52:09,106 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1475 transitions. Word has length 64 [2022-11-03 01:52:09,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:09,106 INFO L495 AbstractCegarLoop]: Abstraction has 1234 states and 1475 transitions. [2022-11-03 01:52:09,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-03 01:52:09,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1475 transitions. [2022-11-03 01:52:09,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 01:52:09,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:09,114 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:09,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:09,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 01:52:09,331 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:09,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:09,331 INFO L85 PathProgramCache]: Analyzing trace with hash -751510534, now seen corresponding path program 2 times [2022-11-03 01:52:09,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:09,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227684101] [2022-11-03 01:52:09,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:09,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:52:09,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:09,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227684101] [2022-11-03 01:52:09,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227684101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:09,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:09,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:52:09,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242872577] [2022-11-03 01:52:09,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:09,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:52:09,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:09,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:52:09,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:52:09,381 INFO L87 Difference]: Start difference. First operand 1234 states and 1475 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 01:52:09,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:09,738 INFO L93 Difference]: Finished difference Result 1986 states and 2331 transitions. [2022-11-03 01:52:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:52:09,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-11-03 01:52:09,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:09,745 INFO L225 Difference]: With dead ends: 1986 [2022-11-03 01:52:09,745 INFO L226 Difference]: Without dead ends: 1230 [2022-11-03 01:52:09,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:52:09,749 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 357 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:09,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 428 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:09,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2022-11-03 01:52:09,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1219. [2022-11-03 01:52:09,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 871 states have (on average 1.2169919632606199) internal successors, (1060), 875 states have internal predecessors, (1060), 194 states have call successors, (194), 154 states have call predecessors, (194), 152 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2022-11-03 01:52:09,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1445 transitions. [2022-11-03 01:52:09,974 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1445 transitions. Word has length 67 [2022-11-03 01:52:09,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:09,975 INFO L495 AbstractCegarLoop]: Abstraction has 1219 states and 1445 transitions. [2022-11-03 01:52:09,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 01:52:09,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1445 transitions. [2022-11-03 01:52:09,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 01:52:09,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:09,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:09,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 01:52:09,978 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:09,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:09,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1473427567, now seen corresponding path program 1 times [2022-11-03 01:52:09,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:09,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104907975] [2022-11-03 01:52:09,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:09,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:10,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:10,109 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 01:52:10,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:10,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104907975] [2022-11-03 01:52:10,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104907975] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:10,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:10,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:52:10,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86240386] [2022-11-03 01:52:10,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:10,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:52:10,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:10,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:52:10,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:10,112 INFO L87 Difference]: Start difference. First operand 1219 states and 1445 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 01:52:11,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:11,493 INFO L93 Difference]: Finished difference Result 2107 states and 2920 transitions. [2022-11-03 01:52:11,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:52:11,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2022-11-03 01:52:11,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:11,507 INFO L225 Difference]: With dead ends: 2107 [2022-11-03 01:52:11,508 INFO L226 Difference]: Without dead ends: 1921 [2022-11-03 01:52:11,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:52:11,511 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 1459 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:11,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1476 Valid, 1487 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 01:52:11,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2022-11-03 01:52:11,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1908. [2022-11-03 01:52:11,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1451 states have (on average 1.3425223983459682) internal successors, (1948), 1458 states have internal predecessors, (1948), 279 states have call successors, (279), 178 states have call predecessors, (279), 176 states have return successors, (338), 273 states have call predecessors, (338), 276 states have call successors, (338) [2022-11-03 01:52:11,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2565 transitions. [2022-11-03 01:52:11,846 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2565 transitions. Word has length 68 [2022-11-03 01:52:11,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:11,846 INFO L495 AbstractCegarLoop]: Abstraction has 1908 states and 2565 transitions. [2022-11-03 01:52:11,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 01:52:11,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2565 transitions. [2022-11-03 01:52:11,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 01:52:11,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:11,849 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:11,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 01:52:11,850 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:11,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:11,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1661010634, now seen corresponding path program 1 times [2022-11-03 01:52:11,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:11,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119463403] [2022-11-03 01:52:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:11,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:52:11,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:11,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119463403] [2022-11-03 01:52:11,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119463403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:11,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:11,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:52:11,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987137995] [2022-11-03 01:52:11,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:11,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:52:11,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:11,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:52:11,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:52:11,918 INFO L87 Difference]: Start difference. First operand 1908 states and 2565 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 01:52:12,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:12,416 INFO L93 Difference]: Finished difference Result 2874 states and 3659 transitions. [2022-11-03 01:52:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:52:12,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-11-03 01:52:12,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:12,429 INFO L225 Difference]: With dead ends: 2874 [2022-11-03 01:52:12,430 INFO L226 Difference]: Without dead ends: 2084 [2022-11-03 01:52:12,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:52:12,434 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 37 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:12,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 664 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:12,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2022-11-03 01:52:12,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1955. [2022-11-03 01:52:12,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1955 states, 1490 states have (on average 1.338255033557047) internal successors, (1994), 1497 states have internal predecessors, (1994), 283 states have call successors, (283), 182 states have call predecessors, (283), 180 states have return successors, (342), 277 states have call predecessors, (342), 280 states have call successors, (342) [2022-11-03 01:52:12,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 2619 transitions. [2022-11-03 01:52:12,783 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 2619 transitions. Word has length 71 [2022-11-03 01:52:12,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:12,784 INFO L495 AbstractCegarLoop]: Abstraction has 1955 states and 2619 transitions. [2022-11-03 01:52:12,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 01:52:12,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 2619 transitions. [2022-11-03 01:52:12,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 01:52:12,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:12,787 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:12,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 01:52:12,788 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:12,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:12,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1600645814, now seen corresponding path program 1 times [2022-11-03 01:52:12,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:12,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122011345] [2022-11-03 01:52:12,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:12,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:13,221 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:52:13,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:13,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122011345] [2022-11-03 01:52:13,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122011345] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:13,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708104885] [2022-11-03 01:52:13,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:13,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:13,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:13,223 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:13,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:52:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:13,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:52:13,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:52:13,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:13,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708104885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:13,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:52:13,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-03 01:52:13,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589288115] [2022-11-03 01:52:13,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:13,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:52:13,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:13,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:52:13,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:52:13,467 INFO L87 Difference]: Start difference. First operand 1955 states and 2619 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 01:52:14,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:14,097 INFO L93 Difference]: Finished difference Result 2817 states and 3623 transitions. [2022-11-03 01:52:14,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:52:14,098 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-03 01:52:14,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:14,106 INFO L225 Difference]: With dead ends: 2817 [2022-11-03 01:52:14,107 INFO L226 Difference]: Without dead ends: 1770 [2022-11-03 01:52:14,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:52:14,110 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 351 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:14,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 1371 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:52:14,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2022-11-03 01:52:14,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1585. [2022-11-03 01:52:14,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1252 states have (on average 1.3761980830670926) internal successors, (1723), 1259 states have internal predecessors, (1723), 212 states have call successors, (212), 121 states have call predecessors, (212), 119 states have return successors, (271), 206 states have call predecessors, (271), 209 states have call successors, (271) [2022-11-03 01:52:14,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 2206 transitions. [2022-11-03 01:52:14,400 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 2206 transitions. Word has length 102 [2022-11-03 01:52:14,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:14,400 INFO L495 AbstractCegarLoop]: Abstraction has 1585 states and 2206 transitions. [2022-11-03 01:52:14,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 01:52:14,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 2206 transitions. [2022-11-03 01:52:14,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 01:52:14,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:14,403 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:14,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:14,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:14,627 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:14,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:14,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1719022457, now seen corresponding path program 1 times [2022-11-03 01:52:14,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:14,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589120212] [2022-11-03 01:52:14,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:14,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:52:14,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:14,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589120212] [2022-11-03 01:52:14,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589120212] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:14,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316828952] [2022-11-03 01:52:14,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:14,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:14,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:14,841 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:14,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:52:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:15,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:15,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:52:15,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:15,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316828952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:15,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:52:15,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-03 01:52:15,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772879999] [2022-11-03 01:52:15,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:15,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:52:15,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:15,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:52:15,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-03 01:52:15,107 INFO L87 Difference]: Start difference. First operand 1585 states and 2206 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 01:52:15,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:15,751 INFO L93 Difference]: Finished difference Result 2134 states and 2831 transitions. [2022-11-03 01:52:15,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:52:15,752 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-03 01:52:15,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:15,761 INFO L225 Difference]: With dead ends: 2134 [2022-11-03 01:52:15,761 INFO L226 Difference]: Without dead ends: 1541 [2022-11-03 01:52:15,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:52:15,764 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 66 mSDsluCounter, 2009 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2059 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:15,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 2059 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:52:15,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2022-11-03 01:52:16,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1449. [2022-11-03 01:52:16,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1152 states have (on average 1.3940972222222223) internal successors, (1606), 1159 states have internal predecessors, (1606), 193 states have call successors, (193), 104 states have call predecessors, (193), 102 states have return successors, (252), 187 states have call predecessors, (252), 190 states have call successors, (252) [2022-11-03 01:52:16,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2051 transitions. [2022-11-03 01:52:16,054 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2051 transitions. Word has length 112 [2022-11-03 01:52:16,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:16,054 INFO L495 AbstractCegarLoop]: Abstraction has 1449 states and 2051 transitions. [2022-11-03 01:52:16,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 01:52:16,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2051 transitions. [2022-11-03 01:52:16,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 01:52:16,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:16,057 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:16,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:16,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 01:52:16,279 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:16,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:16,279 INFO L85 PathProgramCache]: Analyzing trace with hash 972109608, now seen corresponding path program 1 times [2022-11-03 01:52:16,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:16,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212934755] [2022-11-03 01:52:16,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:16,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 01:52:16,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:16,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212934755] [2022-11-03 01:52:16,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212934755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:16,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320960486] [2022-11-03 01:52:16,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:16,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:16,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:16,470 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:16,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:52:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:16,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:52:16,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 01:52:16,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:16,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320960486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:16,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:52:16,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-03 01:52:16,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343020737] [2022-11-03 01:52:16,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:16,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:52:16,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:16,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:52:16,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:52:16,730 INFO L87 Difference]: Start difference. First operand 1449 states and 2051 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:52:17,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:17,243 INFO L93 Difference]: Finished difference Result 2198 states and 2896 transitions. [2022-11-03 01:52:17,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:52:17,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-03 01:52:17,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:17,254 INFO L225 Difference]: With dead ends: 2198 [2022-11-03 01:52:17,254 INFO L226 Difference]: Without dead ends: 1741 [2022-11-03 01:52:17,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:52:17,257 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 337 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 1478 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:17,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 1478 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:52:17,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2022-11-03 01:52:17,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1707. [2022-11-03 01:52:17,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1707 states, 1314 states have (on average 1.3592085235920852) internal successors, (1786), 1327 states have internal predecessors, (1786), 241 states have call successors, (241), 146 states have call predecessors, (241), 150 states have return successors, (312), 235 states have call predecessors, (312), 238 states have call successors, (312) [2022-11-03 01:52:17,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 2339 transitions. [2022-11-03 01:52:17,574 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 2339 transitions. Word has length 113 [2022-11-03 01:52:17,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:17,575 INFO L495 AbstractCegarLoop]: Abstraction has 1707 states and 2339 transitions. [2022-11-03 01:52:17,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:52:17,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 2339 transitions. [2022-11-03 01:52:17,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 01:52:17,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:17,578 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:17,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:17,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 01:52:17,795 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:17,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:17,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1722909842, now seen corresponding path program 1 times [2022-11-03 01:52:17,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:17,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124810403] [2022-11-03 01:52:17,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:17,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 01:52:18,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:18,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124810403] [2022-11-03 01:52:18,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124810403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:18,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762229413] [2022-11-03 01:52:18,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:18,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:18,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:18,724 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:18,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:52:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:18,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-03 01:52:18,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:52:19,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 01:52:21,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762229413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:21,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1995296478] [2022-11-03 01:52:21,719 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-03 01:52:21,719 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:52:21,720 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:52:21,720 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:52:21,720 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:54:07,879 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 384 for LOIs [2022-11-03 01:54:09,104 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 336 for LOIs [2022-11-03 01:54:09,266 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 329 for LOIs [2022-11-03 01:54:09,436 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 396 for LOIs [2022-11-03 01:54:14,564 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 224 for LOIs [2022-11-03 01:54:15,172 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 173 for LOIs [2022-11-03 01:54:15,791 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 388 for LOIs [2022-11-03 01:54:17,069 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 411 for LOIs [2022-11-03 01:54:18,537 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:55:50,851 WARN L234 SmtUtils]: Spent 7.86s on a formula simplification. DAG size of input: 357 DAG size of output: 276 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:56:00,042 WARN L234 SmtUtils]: Spent 7.88s on a formula simplification. DAG size of input: 363 DAG size of output: 282 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:56:09,254 WARN L234 SmtUtils]: Spent 7.82s on a formula simplification. DAG size of input: 365 DAG size of output: 284 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:56:44,388 WARN L234 SmtUtils]: Spent 7.89s on a formula simplification. DAG size of input: 367 DAG size of output: 286 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:56:48,116 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '60624#(and (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (<= ~T5_E~0 2) (<= 2 ~T4_E~0) (= ~t10_i~0 0) (<= 1 ~c_dr_i~0) (<= 0 ~t3_i~0) (= ~t7_i~0 0) (<= ~q_buf_0~0 2147483647) (<= ~p_dw_pc~0 1) (<= ~t12_i~0 0) (<= 2 ~T10_E~0) (<= 0 ~t8_pc~0) (<= ~E_3~0 2) (<= ~t4_st~0 0) (<= 2 ~E_11~0) (<= 0 ~c_dr_pc~0) (<= 0 ~t1_i~0) (<= 0 ~p_dw_st~0) (<= 0 ~t6_st~0) (<= 0 ~local~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (<= ~c_dr_i~0 1) (<= 0 ~t11_pc~0) (<= 0 ~t12_i~0) (<= ~T10_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= 1 ~q_req_up~0) (<= 0 ~t12_st~0) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= 2 ~T11_E~0) (<= ~t11_st~0 0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (= 0 ~t5_st~0) (<= 2 ~E_12~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (<= ~t11_pc~0 0) (<= ~t7_pc~0 0) (<= 0 ~t12_pc~0) (<= ~t1_pc~0 0) (<= ~T4_E~0 2) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (= ~t9_i~0 0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= 0 ~t9_st~0) (<= 0 ~t10_st~0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 2 ~T8_E~0) (<= ~T11_E~0 2) (<= 0 ~t11_st~0) (<= 1 ~c_dr_st~0) (<= 2 ~E_9~0) (<= ~local~0 0) (<= ~t12_st~0 0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= 0 (+ ~p_last_write~0 2147483648)) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= 0 (+ ~q_buf_0~0 2147483648)) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= 2 ~E_3~0) (<= ~t10_pc~0 0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~E_12~0 2) (<= ~t9_st~0 0) (<= ~q_req_up~0 1) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= ~E_10~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (<= 0 ~t6_pc~0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= ~t1_i~0 0) (<= 0 ~t10_pc~0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (<= 2 ~E_10~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (<= ~p_last_write~0 2147483647) (<= 2 ~T9_E~0) (<= ~t3_i~0 0) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= 0 ~t11_i~0) (<= ~t7_st~0 0) (<= 2 ~T12_E~0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= 2 ~E_5~0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t12_pc~0 0) (<= 2 ~T5_E~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (<= ~E_11~0 2) (<= ~t11_i~0 0) (<= ~t6_st~0 0) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~t8_pc~0 0) (<= ~t10_st~0 0) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (<= 0 ~t4_st~0) (= |#NULL.base| 0) (<= ~T12_E~0 2))' at error location [2022-11-03 01:56:48,116 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:56:48,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:56:48,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 49 [2022-11-03 01:56:48,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538998362] [2022-11-03 01:56:48,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:56:48,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 01:56:48,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:48,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 01:56:48,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=9948, Unknown=0, NotChecked=0, Total=10712 [2022-11-03 01:56:48,121 INFO L87 Difference]: Start difference. First operand 1707 states and 2339 transitions. Second operand has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-03 01:57:12,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:12,118 INFO L93 Difference]: Finished difference Result 3997 states and 4993 transitions. [2022-11-03 01:57:12,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2022-11-03 01:57:12,119 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) Word has length 114 [2022-11-03 01:57:12,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:12,133 INFO L225 Difference]: With dead ends: 3997 [2022-11-03 01:57:12,133 INFO L226 Difference]: Without dead ends: 3282 [2022-11-03 01:57:12,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 287 SyntacticMatches, 8 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40697 ImplicationChecksByTransitivity, 167.7s TimeCoverageRelationStatistics Valid=9160, Invalid=89122, Unknown=0, NotChecked=0, Total=98282 [2022-11-03 01:57:12,153 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 5801 mSDsluCounter, 5140 mSDsCounter, 0 mSdLazyCounter, 8524 mSolverCounterSat, 2924 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5803 SdHoareTripleChecker+Valid, 4686 SdHoareTripleChecker+Invalid, 11448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2924 IncrementalHoareTripleChecker+Valid, 8524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:12,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5803 Valid, 4686 Invalid, 11448 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2924 Valid, 8524 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-03 01:57:12,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2022-11-03 01:57:12,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 1983. [2022-11-03 01:57:12,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1498 states have (on average 1.3331108144192256) internal successors, (1997), 1513 states have internal predecessors, (1997), 286 states have call successors, (286), 183 states have call predecessors, (286), 197 states have return successors, (369), 288 states have call predecessors, (369), 283 states have call successors, (369) [2022-11-03 01:57:12,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 2652 transitions. [2022-11-03 01:57:12,647 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 2652 transitions. Word has length 114 [2022-11-03 01:57:12,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:12,647 INFO L495 AbstractCegarLoop]: Abstraction has 1983 states and 2652 transitions. [2022-11-03 01:57:12,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-03 01:57:12,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 2652 transitions. [2022-11-03 01:57:12,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 01:57:12,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:12,667 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:57:12,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-03 01:57:12,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:12,895 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:12,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:12,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1924824183, now seen corresponding path program 1 times [2022-11-03 01:57:12,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:12,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553034612] [2022-11-03 01:57:12,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:12,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:57:13,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:13,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553034612] [2022-11-03 01:57:13,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553034612] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:57:13,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255986315] [2022-11-03 01:57:13,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:13,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:13,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:13,261 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:13,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:57:13,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:13,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 01:57:13,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:57:13,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 01:57:13,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255986315] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:57:13,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:57:13,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-03 01:57:13,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049701078] [2022-11-03 01:57:13,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:13,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:57:13,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:13,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:57:13,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:57:13,786 INFO L87 Difference]: Start difference. First operand 1983 states and 2652 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:57:15,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:15,103 INFO L93 Difference]: Finished difference Result 3307 states and 4200 transitions. [2022-11-03 01:57:15,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:57:15,104 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-03 01:57:15,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:15,115 INFO L225 Difference]: With dead ends: 3307 [2022-11-03 01:57:15,115 INFO L226 Difference]: Without dead ends: 2316 [2022-11-03 01:57:15,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:57:15,118 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 547 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:15,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 842 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:57:15,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2022-11-03 01:57:15,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2063. [2022-11-03 01:57:15,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 1543 states have (on average 1.3272845106934543) internal successors, (2048), 1561 states have internal predecessors, (2048), 305 states have call successors, (305), 192 states have call predecessors, (305), 213 states have return successors, (409), 311 states have call predecessors, (409), 302 states have call successors, (409) [2022-11-03 01:57:15,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 2762 transitions. [2022-11-03 01:57:15,612 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 2762 transitions. Word has length 115 [2022-11-03 01:57:15,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:15,612 INFO L495 AbstractCegarLoop]: Abstraction has 2063 states and 2762 transitions. [2022-11-03 01:57:15,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:57:15,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 2762 transitions. [2022-11-03 01:57:15,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 01:57:15,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:15,616 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:57:15,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:15,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 01:57:15,830 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:15,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:15,831 INFO L85 PathProgramCache]: Analyzing trace with hash -477596166, now seen corresponding path program 1 times [2022-11-03 01:57:15,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:15,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487097543] [2022-11-03 01:57:15,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:15,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:57:16,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:16,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487097543] [2022-11-03 01:57:16,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487097543] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:57:16,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27043612] [2022-11-03 01:57:16,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:16,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:16,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:16,626 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:16,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:57:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:16,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 01:57:16,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:57:17,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 01:57:19,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27043612] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:19,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [593216741] [2022-11-03 01:57:19,356 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-03 01:57:19,357 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:57:19,357 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:57:19,357 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:57:19,357 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:57:47,779 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 372 for LOIs [2022-11-03 01:57:48,897 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 321 for LOIs [2022-11-03 01:57:49,048 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 319 for LOIs [2022-11-03 01:57:49,215 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 384 for LOIs [2022-11-03 01:57:53,918 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 212 for LOIs [2022-11-03 01:57:54,528 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 160 for LOIs [2022-11-03 01:57:55,084 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 376 for LOIs [2022-11-03 01:57:56,486 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 399 for LOIs [2022-11-03 01:57:57,563 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:58:38,496 WARN L234 SmtUtils]: Spent 7.02s on a formula simplification. DAG size of input: 327 DAG size of output: 248 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:58:46,798 WARN L234 SmtUtils]: Spent 7.08s on a formula simplification. DAG size of input: 329 DAG size of output: 250 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:33,241 WARN L234 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 355 DAG size of output: 274 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:00:08,888 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '79068#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~E_11~0 2) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (<= 0 ~t11_i~0) (= 0 ~t2_st~0) (<= 2 ~T12_E~0) (<= 2 ~E_5~0) (= ~t12_st~0 0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (= ~t11_st~0 0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (<= 0 ~t4_pc~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (<= ~t11_i~0 0) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0) (<= ~T12_E~0 2))' at error location [2022-11-03 02:00:08,888 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:08,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:08,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 49 [2022-11-03 02:00:08,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291870773] [2022-11-03 02:00:08,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:08,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 02:00:08,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:08,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 02:00:08,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=10477, Unknown=0, NotChecked=0, Total=11342 [2022-11-03 02:00:08,892 INFO L87 Difference]: Start difference. First operand 2063 states and 2762 transitions. Second operand has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-03 02:00:20,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:20,495 INFO L93 Difference]: Finished difference Result 4912 states and 6104 transitions. [2022-11-03 02:00:20,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-03 02:00:20,496 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) Word has length 124 [2022-11-03 02:00:20,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:20,517 INFO L225 Difference]: With dead ends: 4912 [2022-11-03 02:00:20,518 INFO L226 Difference]: Without dead ends: 3841 [2022-11-03 02:00:20,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 310 SyntacticMatches, 5 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14920 ImplicationChecksByTransitivity, 137.8s TimeCoverageRelationStatistics Valid=3633, Invalid=32277, Unknown=0, NotChecked=0, Total=35910 [2022-11-03 02:00:20,527 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 4352 mSDsluCounter, 3860 mSDsCounter, 0 mSdLazyCounter, 6744 mSolverCounterSat, 2402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4353 SdHoareTripleChecker+Valid, 3536 SdHoareTripleChecker+Invalid, 9146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2402 IncrementalHoareTripleChecker+Valid, 6744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:20,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4353 Valid, 3536 Invalid, 9146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2402 Valid, 6744 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-03 02:00:20,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3841 states. [2022-11-03 02:00:21,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3841 to 2600. [2022-11-03 02:00:21,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 1929 states have (on average 1.2944530844997408) internal successors, (2497), 1947 states have internal predecessors, (2497), 379 states have call successors, (379), 251 states have call predecessors, (379), 290 states have return successors, (501), 403 states have call predecessors, (501), 376 states have call successors, (501) [2022-11-03 02:00:21,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 3377 transitions. [2022-11-03 02:00:21,171 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 3377 transitions. Word has length 124 [2022-11-03 02:00:21,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:21,172 INFO L495 AbstractCegarLoop]: Abstraction has 2600 states and 3377 transitions. [2022-11-03 02:00:21,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-03 02:00:21,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 3377 transitions. [2022-11-03 02:00:21,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 02:00:21,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:21,181 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:21,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:21,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:21,407 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:21,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:21,407 INFO L85 PathProgramCache]: Analyzing trace with hash -56603535, now seen corresponding path program 1 times [2022-11-03 02:00:21,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:21,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289157691] [2022-11-03 02:00:21,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:21,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:00:21,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:21,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289157691] [2022-11-03 02:00:21,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289157691] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:21,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296079333] [2022-11-03 02:00:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:21,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:21,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:21,626 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:21,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:00:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:21,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:00:21,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:00:21,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 02:00:22,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296079333] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:22,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:00:22,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-03 02:00:22,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601881334] [2022-11-03 02:00:22,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:22,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:00:22,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:22,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:00:22,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:00:22,141 INFO L87 Difference]: Start difference. First operand 2600 states and 3377 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:00:23,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:23,480 INFO L93 Difference]: Finished difference Result 3559 states and 4468 transitions. [2022-11-03 02:00:23,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:00:23,480 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-03 02:00:23,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:23,490 INFO L225 Difference]: With dead ends: 3559 [2022-11-03 02:00:23,490 INFO L226 Difference]: Without dead ends: 1951 [2022-11-03 02:00:23,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:00:23,499 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 832 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:23,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 806 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:00:23,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2022-11-03 02:00:23,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1610. [2022-11-03 02:00:23,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1232 states have (on average 1.359577922077922) internal successors, (1675), 1249 states have internal predecessors, (1675), 229 states have call successors, (229), 130 states have call predecessors, (229), 147 states have return successors, (318), 232 states have call predecessors, (318), 226 states have call successors, (318) [2022-11-03 02:00:23,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2222 transitions. [2022-11-03 02:00:23,838 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2222 transitions. Word has length 125 [2022-11-03 02:00:23,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:23,839 INFO L495 AbstractCegarLoop]: Abstraction has 1610 states and 2222 transitions. [2022-11-03 02:00:23,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:00:23,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2222 transitions. [2022-11-03 02:00:23,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:00:23,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:23,844 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:23,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:24,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:24,071 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:24,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:24,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1655140884, now seen corresponding path program 1 times [2022-11-03 02:00:24,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:24,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192941892] [2022-11-03 02:00:24,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:24,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:00:24,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:24,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192941892] [2022-11-03 02:00:24,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192941892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:24,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879744518] [2022-11-03 02:00:24,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:24,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:24,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:24,238 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:24,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:00:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:24,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:00:24,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:00:24,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:24,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879744518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:24,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:00:24,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:00:24,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748944839] [2022-11-03 02:00:24,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:24,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:00:24,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:24,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:00:24,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:00:24,565 INFO L87 Difference]: Start difference. First operand 1610 states and 2222 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:00:25,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:25,162 INFO L93 Difference]: Finished difference Result 3344 states and 5134 transitions. [2022-11-03 02:00:25,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:00:25,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-11-03 02:00:25,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:25,173 INFO L225 Difference]: With dead ends: 3344 [2022-11-03 02:00:25,173 INFO L226 Difference]: Without dead ends: 2469 [2022-11-03 02:00:25,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:00:25,179 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 353 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:25,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 572 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:00:25,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2022-11-03 02:00:25,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2460. [2022-11-03 02:00:25,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 1950 states have (on average 1.4205128205128206) internal successors, (2770), 1970 states have internal predecessors, (2770), 331 states have call successors, (331), 160 states have call predecessors, (331), 177 states have return successors, (478), 331 states have call predecessors, (478), 328 states have call successors, (478) [2022-11-03 02:00:25,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 3579 transitions. [2022-11-03 02:00:25,818 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 3579 transitions. Word has length 137 [2022-11-03 02:00:25,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:25,819 INFO L495 AbstractCegarLoop]: Abstraction has 2460 states and 3579 transitions. [2022-11-03 02:00:25,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:00:25,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 3579 transitions. [2022-11-03 02:00:25,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:00:25,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:25,823 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:25,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:26,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:26,024 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:26,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:26,024 INFO L85 PathProgramCache]: Analyzing trace with hash 150854348, now seen corresponding path program 1 times [2022-11-03 02:00:26,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:26,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608690627] [2022-11-03 02:00:26,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:26,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:00:26,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:26,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608690627] [2022-11-03 02:00:26,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608690627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:26,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737402371] [2022-11-03 02:00:26,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:26,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:26,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:26,176 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:26,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:00:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:26,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:00:26,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:00:26,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:26,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737402371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:26,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:00:26,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:00:26,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026251202] [2022-11-03 02:00:26,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:26,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:00:26,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:26,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:00:26,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:00:26,485 INFO L87 Difference]: Start difference. First operand 2460 states and 3579 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:00:27,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:27,331 INFO L93 Difference]: Finished difference Result 5879 states and 9297 transitions. [2022-11-03 02:00:27,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:00:27,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-11-03 02:00:27,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:27,350 INFO L225 Difference]: With dead ends: 5879 [2022-11-03 02:00:27,350 INFO L226 Difference]: Without dead ends: 4154 [2022-11-03 02:00:27,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:00:27,360 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 344 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:27,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 572 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:00:27,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4154 states. [2022-11-03 02:00:27,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4154 to 4140. [2022-11-03 02:00:27,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4140 states, 3371 states have (on average 1.4624740433105903) internal successors, (4930), 3397 states have internal predecessors, (4930), 530 states have call successors, (530), 220 states have call predecessors, (530), 237 states have return successors, (789), 524 states have call predecessors, (789), 527 states have call successors, (789) [2022-11-03 02:00:28,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4140 states to 4140 states and 6249 transitions. [2022-11-03 02:00:28,009 INFO L78 Accepts]: Start accepts. Automaton has 4140 states and 6249 transitions. Word has length 137 [2022-11-03 02:00:28,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:28,009 INFO L495 AbstractCegarLoop]: Abstraction has 4140 states and 6249 transitions. [2022-11-03 02:00:28,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:00:28,009 INFO L276 IsEmpty]: Start isEmpty. Operand 4140 states and 6249 transitions. [2022-11-03 02:00:28,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:00:28,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:28,018 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:28,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:28,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-03 02:00:28,231 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:28,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:28,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1898222060, now seen corresponding path program 1 times [2022-11-03 02:00:28,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:28,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10679925] [2022-11-03 02:00:28,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:28,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:00:28,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:28,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10679925] [2022-11-03 02:00:28,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10679925] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:28,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024336553] [2022-11-03 02:00:28,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:28,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:28,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:28,368 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:28,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:00:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:28,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:00:28,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:28,679 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:00:28,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:28,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024336553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:28,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:00:28,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:00:28,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349939288] [2022-11-03 02:00:28,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:28,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:00:28,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:28,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:00:28,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:00:28,681 INFO L87 Difference]: Start difference. First operand 4140 states and 6249 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:00:29,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:29,869 INFO L93 Difference]: Finished difference Result 10889 states and 17482 transitions. [2022-11-03 02:00:29,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:00:29,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-11-03 02:00:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:29,901 INFO L225 Difference]: With dead ends: 10889 [2022-11-03 02:00:29,901 INFO L226 Difference]: Without dead ends: 7484 [2022-11-03 02:00:29,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:00:29,920 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 350 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:29,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 572 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:00:29,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7484 states. [2022-11-03 02:00:30,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7484 to 7460. [2022-11-03 02:00:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7460 states, 6183 states have (on average 1.4863334950671194) internal successors, (9190), 6221 states have internal predecessors, (9190), 918 states have call successors, (918), 340 states have call predecessors, (918), 357 states have return successors, (1393), 900 states have call predecessors, (1393), 915 states have call successors, (1393) [2022-11-03 02:00:31,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7460 states to 7460 states and 11501 transitions. [2022-11-03 02:00:31,005 INFO L78 Accepts]: Start accepts. Automaton has 7460 states and 11501 transitions. Word has length 137 [2022-11-03 02:00:31,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:31,005 INFO L495 AbstractCegarLoop]: Abstraction has 7460 states and 11501 transitions. [2022-11-03 02:00:31,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:00:31,005 INFO L276 IsEmpty]: Start isEmpty. Operand 7460 states and 11501 transitions. [2022-11-03 02:00:31,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:00:31,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:31,021 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:31,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:31,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-03 02:00:31,235 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:31,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:31,235 INFO L85 PathProgramCache]: Analyzing trace with hash -705859316, now seen corresponding path program 1 times [2022-11-03 02:00:31,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:31,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415701472] [2022-11-03 02:00:31,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:31,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:00:31,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:31,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415701472] [2022-11-03 02:00:31,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415701472] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:31,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067054080] [2022-11-03 02:00:31,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:31,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:31,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:31,377 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:31,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:00:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:31,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:00:31,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:00:31,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:31,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067054080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:31,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:00:31,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:00:31,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134110097] [2022-11-03 02:00:31,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:31,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:00:31,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:31,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:00:31,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:00:31,708 INFO L87 Difference]: Start difference. First operand 7460 states and 11501 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:00:33,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:33,899 INFO L93 Difference]: Finished difference Result 20789 states and 33570 transitions. [2022-11-03 02:00:33,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:00:33,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-11-03 02:00:33,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:33,975 INFO L225 Difference]: With dead ends: 20789 [2022-11-03 02:00:33,975 INFO L226 Difference]: Without dead ends: 14064 [2022-11-03 02:00:34,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:00:34,012 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 332 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:34,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 569 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:00:34,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14064 states. [2022-11-03 02:00:36,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14064 to 14020. [2022-11-03 02:00:36,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14020 states, 11747 states have (on average 1.4974035924065718) internal successors, (17590), 11809 states have internal predecessors, (17590), 1674 states have call successors, (1674), 580 states have call predecessors, (1674), 597 states have return successors, (2565), 1632 states have call predecessors, (2565), 1671 states have call successors, (2565) [2022-11-03 02:00:36,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14020 states to 14020 states and 21829 transitions. [2022-11-03 02:00:36,195 INFO L78 Accepts]: Start accepts. Automaton has 14020 states and 21829 transitions. Word has length 137 [2022-11-03 02:00:36,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:36,195 INFO L495 AbstractCegarLoop]: Abstraction has 14020 states and 21829 transitions. [2022-11-03 02:00:36,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:00:36,195 INFO L276 IsEmpty]: Start isEmpty. Operand 14020 states and 21829 transitions. [2022-11-03 02:00:36,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:00:36,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:36,218 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:36,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:36,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:36,435 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:36,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:36,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1307191252, now seen corresponding path program 1 times [2022-11-03 02:00:36,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:36,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470106528] [2022-11-03 02:00:36,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:36,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:00:36,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:36,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470106528] [2022-11-03 02:00:36,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470106528] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:36,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524859983] [2022-11-03 02:00:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:36,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:36,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:36,570 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:36,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:00:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:36,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:00:36,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:00:36,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:36,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524859983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:36,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:00:36,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:00:36,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479276042] [2022-11-03 02:00:36,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:36,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:00:36,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:36,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:00:36,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:00:36,890 INFO L87 Difference]: Start difference. First operand 14020 states and 21829 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:00:40,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:40,634 INFO L93 Difference]: Finished difference Result 40349 states and 65182 transitions. [2022-11-03 02:00:40,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:00:40,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-11-03 02:00:40,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:40,794 INFO L225 Difference]: With dead ends: 40349 [2022-11-03 02:00:40,794 INFO L226 Difference]: Without dead ends: 27064 [2022-11-03 02:00:40,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:00:40,861 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 338 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:40,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 569 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:00:40,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27064 states. [2022-11-03 02:00:45,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27064 to 26980. [2022-11-03 02:00:45,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26980 states, 22755 states have (on average 1.5007690617446714) internal successors, (34150), 22865 states have internal predecessors, (34150), 3146 states have call successors, (3146), 1060 states have call predecessors, (3146), 1077 states have return successors, (4837), 3056 states have call predecessors, (4837), 3143 states have call successors, (4837) [2022-11-03 02:00:45,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26980 states to 26980 states and 42133 transitions. [2022-11-03 02:00:45,318 INFO L78 Accepts]: Start accepts. Automaton has 26980 states and 42133 transitions. Word has length 137 [2022-11-03 02:00:45,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:45,318 INFO L495 AbstractCegarLoop]: Abstraction has 26980 states and 42133 transitions. [2022-11-03 02:00:45,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:00:45,319 INFO L276 IsEmpty]: Start isEmpty. Operand 26980 states and 42133 transitions. [2022-11-03 02:00:45,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:00:45,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:45,369 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:45,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:45,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-03 02:00:45,595 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:45,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:45,595 INFO L85 PathProgramCache]: Analyzing trace with hash 249325388, now seen corresponding path program 1 times [2022-11-03 02:00:45,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:45,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126453811] [2022-11-03 02:00:45,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:45,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:45,757 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:00:45,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:45,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126453811] [2022-11-03 02:00:45,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126453811] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:45,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891224144] [2022-11-03 02:00:45,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:45,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:45,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:45,760 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:45,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:00:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:46,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:00:46,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:00:46,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:46,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891224144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:46,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:00:46,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:00:46,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10402332] [2022-11-03 02:00:46,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:46,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:00:46,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:46,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:00:46,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:00:46,170 INFO L87 Difference]: Start difference. First operand 26980 states and 42133 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:00:53,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:53,459 INFO L93 Difference]: Finished difference Result 78989 states and 127278 transitions. [2022-11-03 02:00:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:00:53,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2022-11-03 02:00:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:53,749 INFO L225 Difference]: With dead ends: 78989 [2022-11-03 02:00:53,749 INFO L226 Difference]: Without dead ends: 52744 [2022-11-03 02:00:53,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:00:53,856 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 329 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:53,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 569 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:00:53,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52744 states. [2022-11-03 02:01:01,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52744 to 52580. [2022-11-03 02:01:01,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52580 states, 44531 states have (on average 1.4998540342682625) internal successors, (66790), 44737 states have internal predecessors, (66790), 6010 states have call successors, (6010), 2020 states have call predecessors, (6010), 2037 states have return successors, (9237), 5824 states have call predecessors, (9237), 6007 states have call successors, (9237) [2022-11-03 02:01:01,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52580 states to 52580 states and 82037 transitions. [2022-11-03 02:01:01,617 INFO L78 Accepts]: Start accepts. Automaton has 52580 states and 82037 transitions. Word has length 137 [2022-11-03 02:01:01,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:01,618 INFO L495 AbstractCegarLoop]: Abstraction has 52580 states and 82037 transitions. [2022-11-03 02:01:01,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:01:01,619 INFO L276 IsEmpty]: Start isEmpty. Operand 52580 states and 82037 transitions. [2022-11-03 02:01:01,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:01:01,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:01,699 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:01,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:01,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1606573-9d37-490e-bd35-60a8c3fe607e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-03 02:01:01,927 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:01,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:01,927 INFO L85 PathProgramCache]: Analyzing trace with hash -398306260, now seen corresponding path program 1 times [2022-11-03 02:01:01,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:01,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735269227] [2022-11-03 02:01:01,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:01,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:01:02,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:02,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735269227] [2022-11-03 02:01:02,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735269227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:02,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:02,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:01:02,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79788491] [2022-11-03 02:01:02,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:02,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:01:02,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:02,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:01:02,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:01:02,584 INFO L87 Difference]: Start difference. First operand 52580 states and 82037 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)