./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+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_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/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_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/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_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/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 67128d109acca52d0fda3c2f0434d60ee9cc5cc865496b6446183c0a601e748c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:43:58,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:43:58,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:43:58,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:43:58,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:43:58,781 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:43:58,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:43:58,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:43:58,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:43:58,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:43:58,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:43:58,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:43:58,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:43:58,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:43:58,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:43:58,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:43:58,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:43:58,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:43:58,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:43:58,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:43:58,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:43:58,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:43:58,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:43:58,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:43:58,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:43:58,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:43:58,832 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:43:58,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:43:58,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:43:58,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:43:58,836 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:43:58,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:43:58,839 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:43:58,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:43:58,842 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:43:58,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:43:58,843 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:43:58,844 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:43:58,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:43:58,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:43:58,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:43:58,846 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:43:58,883 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:43:58,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:43:58,884 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:43:58,884 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:43:58,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:43:58,885 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:43:58,886 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:43:58,886 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:43:58,886 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:43:58,887 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:43:58,888 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:43:58,888 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:43:58,889 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:43:58,889 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:43:58,889 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:43:58,890 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:43:58,890 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:43:58,890 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:43:58,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:43:58,891 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:43:58,892 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:43:58,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:43:58,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:43:58,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:43:58,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:43:58,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:43:58,893 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:43:58,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:43:58,896 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:43:58,896 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:43:58,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:43:58,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:43:58,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:43:58,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:43:58,898 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:43:58,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:43:58,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:43:58,899 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:43:58,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:43:58,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:43:58,900 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:43:58,900 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_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67128d109acca52d0fda3c2f0434d60ee9cc5cc865496b6446183c0a601e748c [2022-11-03 02:43:59,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:43:59,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:43:59,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:43:59,259 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:43:59,263 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:43:59,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-1.c [2022-11-03 02:43:59,328 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/data/359c9248f/e24353a9479d4ae5a6250c6302993cac/FLAGc02dd231f [2022-11-03 02:43:59,818 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:43:59,819 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-1.c [2022-11-03 02:43:59,853 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/data/359c9248f/e24353a9479d4ae5a6250c6302993cac/FLAGc02dd231f [2022-11-03 02:44:00,152 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/data/359c9248f/e24353a9479d4ae5a6250c6302993cac [2022-11-03 02:44:00,156 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:44:00,158 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:44:00,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:44:00,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:44:00,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:44:00,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:44:00" (1/1) ... [2022-11-03 02:44:00,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7adb59a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:00, skipping insertion in model container [2022-11-03 02:44:00,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:44:00" (1/1) ... [2022-11-03 02:44:00,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:44:00,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:44:00,495 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_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-1.c[913,926] [2022-11-03 02:44:00,562 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_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-1.c[5977,5990] [2022-11-03 02:44:00,697 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:44:00,707 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:44:00,719 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_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-1.c[913,926] [2022-11-03 02:44:00,744 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_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-1.c[5977,5990] [2022-11-03 02:44:00,867 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:44:00,897 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:44:00,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:00 WrapperNode [2022-11-03 02:44:00,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:44:00,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:44:00,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:44:00,899 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:44:00,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:00" (1/1) ... [2022-11-03 02:44:00,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:00" (1/1) ... [2022-11-03 02:44:01,011 INFO L138 Inliner]: procedures = 72, calls = 85, calls flagged for inlining = 46, calls inlined = 46, statements flattened = 1060 [2022-11-03 02:44:01,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:44:01,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:44:01,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:44:01,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:44:01,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:00" (1/1) ... [2022-11-03 02:44:01,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:00" (1/1) ... [2022-11-03 02:44:01,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:00" (1/1) ... [2022-11-03 02:44:01,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:00" (1/1) ... [2022-11-03 02:44:01,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:00" (1/1) ... [2022-11-03 02:44:01,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:00" (1/1) ... [2022-11-03 02:44:01,089 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:00" (1/1) ... [2022-11-03 02:44:01,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:00" (1/1) ... [2022-11-03 02:44:01,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:44:01,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:44:01,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:44:01,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:44:01,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:00" (1/1) ... [2022-11-03 02:44:01,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:44:01,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:01,153 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:44:01,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:44:01,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:44:01,209 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 02:44:01,209 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 02:44:01,209 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-11-03 02:44:01,209 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-11-03 02:44:01,210 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-03 02:44:01,210 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-03 02:44:01,210 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-03 02:44:01,210 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-03 02:44:01,210 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-03 02:44:01,210 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-03 02:44:01,210 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-03 02:44:01,211 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-03 02:44:01,211 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-03 02:44:01,211 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-03 02:44:01,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:44:01,211 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-03 02:44:01,211 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-03 02:44:01,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:44:01,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:44:01,212 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-03 02:44:01,212 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-03 02:44:01,212 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-03 02:44:01,212 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-03 02:44:01,411 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:44:01,413 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:44:02,538 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:44:03,140 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:44:03,141 INFO L300 CfgBuilder]: Removed 19 assume(true) statements. [2022-11-03 02:44:03,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:44:03 BoogieIcfgContainer [2022-11-03 02:44:03,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:44:03,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:44:03,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:44:03,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:44:03,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:44:00" (1/3) ... [2022-11-03 02:44:03,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bda6519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:44:03, skipping insertion in model container [2022-11-03 02:44:03,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:00" (2/3) ... [2022-11-03 02:44:03,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bda6519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:44:03, skipping insertion in model container [2022-11-03 02:44:03,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:44:03" (3/3) ... [2022-11-03 02:44:03,155 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.12.cil-1.c [2022-11-03 02:44:03,176 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:44:03,176 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:44:03,255 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:44:03,272 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;@7d466e7e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:44:03,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:44:03,281 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 198 states have (on average 1.5707070707070707) internal successors, (311), 205 states have internal predecessors, (311), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-03 02:44:03,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 02:44:03,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:03,294 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] [2022-11-03 02:44:03,295 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:03,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:03,302 INFO L85 PathProgramCache]: Analyzing trace with hash 130843707, now seen corresponding path program 1 times [2022-11-03 02:44:03,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:03,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117238022] [2022-11-03 02:44:03,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:03,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:03,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:03,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117238022] [2022-11-03 02:44:03,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117238022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:03,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:03,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:44:03,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353062217] [2022-11-03 02:44:03,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:03,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:44:03,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:03,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:44:03,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:44:03,740 INFO L87 Difference]: Start difference. First operand has 245 states, 198 states have (on average 1.5707070707070707) internal successors, (311), 205 states have internal predecessors, (311), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:44:04,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:04,041 INFO L93 Difference]: Finished difference Result 522 states and 806 transitions. [2022-11-03 02:44:04,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:44:04,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-03 02:44:04,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:04,085 INFO L225 Difference]: With dead ends: 522 [2022-11-03 02:44:04,086 INFO L226 Difference]: Without dead ends: 277 [2022-11-03 02:44:04,094 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 02:44:04,100 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 344 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:04,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 375 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:44:04,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-11-03 02:44:04,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 273. [2022-11-03 02:44:04,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 224 states have (on average 1.5089285714285714) internal successors, (338), 228 states have internal predecessors, (338), 37 states have call successors, (37), 12 states have call predecessors, (37), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-03 02:44:04,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 408 transitions. [2022-11-03 02:44:04,182 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 408 transitions. Word has length 28 [2022-11-03 02:44:04,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:04,185 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 408 transitions. [2022-11-03 02:44:04,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:44:04,186 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 408 transitions. [2022-11-03 02:44:04,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 02:44:04,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:04,190 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] [2022-11-03 02:44:04,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:44:04,191 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:04,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:04,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1121644788, now seen corresponding path program 1 times [2022-11-03 02:44:04,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:04,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618180312] [2022-11-03 02:44:04,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:04,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:04,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:04,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618180312] [2022-11-03 02:44:04,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618180312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:04,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:04,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:44:04,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481648616] [2022-11-03 02:44:04,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:04,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:44:04,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:04,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:44:04,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:44:04,321 INFO L87 Difference]: Start difference. First operand 273 states and 408 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:44:04,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:04,513 INFO L93 Difference]: Finished difference Result 429 states and 625 transitions. [2022-11-03 02:44:04,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:44:04,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-11-03 02:44:04,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:04,519 INFO L225 Difference]: With dead ends: 429 [2022-11-03 02:44:04,519 INFO L226 Difference]: Without dead ends: 348 [2022-11-03 02:44:04,522 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 02:44:04,524 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 342 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:04,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 360 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:44:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-11-03 02:44:04,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2022-11-03 02:44:04,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 284 states have (on average 1.4753521126760563) internal successors, (419), 288 states have internal predecessors, (419), 44 states have call successors, (44), 16 states have call predecessors, (44), 14 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-03 02:44:04,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 503 transitions. [2022-11-03 02:44:04,573 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 503 transitions. Word has length 29 [2022-11-03 02:44:04,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:04,574 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 503 transitions. [2022-11-03 02:44:04,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:44:04,575 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 503 transitions. [2022-11-03 02:44:04,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 02:44:04,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:04,582 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] [2022-11-03 02:44:04,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:44:04,582 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:04,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:04,592 INFO L85 PathProgramCache]: Analyzing trace with hash 130214941, now seen corresponding path program 1 times [2022-11-03 02:44:04,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:04,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840492469] [2022-11-03 02:44:04,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:04,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:04,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:04,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840492469] [2022-11-03 02:44:04,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840492469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:04,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:04,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:44:04,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549604676] [2022-11-03 02:44:04,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:04,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:44:04,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:04,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:44:04,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:44:04,701 INFO L87 Difference]: Start difference. First operand 344 states and 503 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:44:04,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:04,876 INFO L93 Difference]: Finished difference Result 584 states and 831 transitions. [2022-11-03 02:44:04,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:44:04,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-11-03 02:44:04,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:04,879 INFO L225 Difference]: With dead ends: 584 [2022-11-03 02:44:04,879 INFO L226 Difference]: Without dead ends: 432 [2022-11-03 02:44:04,880 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 02:44:04,881 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 46 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:04,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 605 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:44:04,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-11-03 02:44:04,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 418. [2022-11-03 02:44:04,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 347 states have (on average 1.4524495677233429) internal successors, (504), 353 states have internal predecessors, (504), 50 states have call successors, (50), 21 states have call predecessors, (50), 19 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-03 02:44:04,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 600 transitions. [2022-11-03 02:44:04,938 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 600 transitions. Word has length 30 [2022-11-03 02:44:04,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:04,938 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 600 transitions. [2022-11-03 02:44:04,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:44:04,939 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 600 transitions. [2022-11-03 02:44:04,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 02:44:04,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:04,941 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] [2022-11-03 02:44:04,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:44:04,942 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:04,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:04,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1835764423, now seen corresponding path program 1 times [2022-11-03 02:44:04,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:04,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817851571] [2022-11-03 02:44:04,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:04,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:05,017 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 02:44:05,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:05,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817851571] [2022-11-03 02:44:05,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817851571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:05,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:05,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:44:05,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181117796] [2022-11-03 02:44:05,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:05,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:44:05,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:05,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:44:05,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:44:05,021 INFO L87 Difference]: Start difference. First operand 418 states and 600 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:44:05,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:05,203 INFO L93 Difference]: Finished difference Result 581 states and 818 transitions. [2022-11-03 02:44:05,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:44:05,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2022-11-03 02:44:05,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:05,209 INFO L225 Difference]: With dead ends: 581 [2022-11-03 02:44:05,209 INFO L226 Difference]: Without dead ends: 423 [2022-11-03 02:44:05,210 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 02:44:05,219 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 32 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:05,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 637 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:44:05,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-11-03 02:44:05,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 412. [2022-11-03 02:44:05,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 341 states have (on average 1.436950146627566) internal successors, (490), 347 states have internal predecessors, (490), 50 states have call successors, (50), 21 states have call predecessors, (50), 19 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-03 02:44:05,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 586 transitions. [2022-11-03 02:44:05,266 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 586 transitions. Word has length 43 [2022-11-03 02:44:05,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:05,267 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 586 transitions. [2022-11-03 02:44:05,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:44:05,267 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 586 transitions. [2022-11-03 02:44:05,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 02:44:05,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:05,272 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] [2022-11-03 02:44:05,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:44:05,272 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:05,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:05,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1171708229, now seen corresponding path program 1 times [2022-11-03 02:44:05,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:05,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871544081] [2022-11-03 02:44:05,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:05,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:44:05,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:05,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871544081] [2022-11-03 02:44:05,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871544081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:05,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:05,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:44:05,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408370242] [2022-11-03 02:44:05,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:05,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:44:05,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:05,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:44:05,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:44:05,355 INFO L87 Difference]: Start difference. First operand 412 states and 586 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 02:44:05,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:05,488 INFO L93 Difference]: Finished difference Result 661 states and 910 transitions. [2022-11-03 02:44:05,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:44:05,489 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-11-03 02:44:05,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:05,495 INFO L225 Difference]: With dead ends: 661 [2022-11-03 02:44:05,496 INFO L226 Difference]: Without dead ends: 458 [2022-11-03 02:44:05,497 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 02:44:05,501 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 328 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:05,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 358 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:44:05,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-11-03 02:44:05,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 458. [2022-11-03 02:44:05,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 380 states have (on average 1.4026315789473685) internal successors, (533), 386 states have internal predecessors, (533), 54 states have call successors, (54), 24 states have call predecessors, (54), 22 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-03 02:44:05,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 637 transitions. [2022-11-03 02:44:05,535 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 637 transitions. Word has length 46 [2022-11-03 02:44:05,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:05,535 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 637 transitions. [2022-11-03 02:44:05,535 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 02:44:05,535 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 637 transitions. [2022-11-03 02:44:05,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:44:05,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:05,537 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:44:05,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:44:05,537 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:05,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:05,538 INFO L85 PathProgramCache]: Analyzing trace with hash -898619278, now seen corresponding path program 1 times [2022-11-03 02:44:05,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:05,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351857158] [2022-11-03 02:44:05,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:05,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:05,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:44:05,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:05,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351857158] [2022-11-03 02:44:05,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351857158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:05,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:05,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:44:05,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982739003] [2022-11-03 02:44:05,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:05,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:44:05,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:05,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:44:05,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:44:05,656 INFO L87 Difference]: Start difference. First operand 458 states and 637 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:44:05,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:05,939 INFO L93 Difference]: Finished difference Result 498 states and 684 transitions. [2022-11-03 02:44:05,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:44:05,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-11-03 02:44:05,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:05,942 INFO L225 Difference]: With dead ends: 498 [2022-11-03 02:44:05,943 INFO L226 Difference]: Without dead ends: 495 [2022-11-03 02:44:05,943 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 02:44:05,944 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 596 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:05,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 356 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:44:05,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-11-03 02:44:05,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 457. [2022-11-03 02:44:05,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 380 states have (on average 1.3973684210526316) internal successors, (531), 385 states have internal predecessors, (531), 53 states have call successors, (53), 24 states have call predecessors, (53), 22 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-03 02:44:05,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 634 transitions. [2022-11-03 02:44:05,982 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 634 transitions. Word has length 47 [2022-11-03 02:44:05,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:05,983 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 634 transitions. [2022-11-03 02:44:05,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:44:05,983 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 634 transitions. [2022-11-03 02:44:05,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 02:44:05,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:05,985 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:44:05,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:44:05,985 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:05,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:05,986 INFO L85 PathProgramCache]: Analyzing trace with hash -2088814754, now seen corresponding path program 1 times [2022-11-03 02:44:05,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:05,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536523816] [2022-11-03 02:44:05,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:05,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:06,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:44:06,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:06,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536523816] [2022-11-03 02:44:06,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536523816] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:44:06,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456710357] [2022-11-03 02:44:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:06,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:44:06,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:06,138 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:44:06,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:44:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:06,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:44:06,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:06,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:44:06,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456710357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:06,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [757701051] [2022-11-03 02:44:06,848 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-11-03 02:44:06,848 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:44:06,852 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:44:06,857 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:44:06,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:44:13,378 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 185 for LOIs [2022-11-03 02:44:13,405 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 200 for LOIs [2022-11-03 02:44:13,440 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 416 for LOIs [2022-11-03 02:44:16,420 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:44:28,293 WARN L234 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 405 DAG size of output: 222 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:44:37,129 WARN L234 SmtUtils]: Spent 7.91s on a formula simplification. DAG size of input: 416 DAG size of output: 322 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:44:58,582 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8610#(and (= ~E_12~0 2) (= ~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) (= ~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) (<= ~p_num_write~0 1) (= ~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) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~p_dw_pc~0 1) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~q_write_ev~0 2) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~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) (= ~q_read_ev~0 2) (= ~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) (<= ~p_last_write~0 2147483647) (= ~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) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:44:58,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:44:58,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:44:58,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-03 02:44:58,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550137201] [2022-11-03 02:44:58,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:44:58,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:44:58,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:58,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:44:58,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:44:58,585 INFO L87 Difference]: Start difference. First operand 457 states and 634 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 02:44:59,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:59,136 INFO L93 Difference]: Finished difference Result 900 states and 1202 transitions. [2022-11-03 02:44:59,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:44:59,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2022-11-03 02:44:59,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:59,141 INFO L225 Difference]: With dead ends: 900 [2022-11-03 02:44:59,141 INFO L226 Difference]: Without dead ends: 897 [2022-11-03 02:44:59,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 42.2s TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:44:59,144 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 738 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:59,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 1265 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:44:59,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-11-03 02:44:59,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 666. [2022-11-03 02:44:59,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 557 states have (on average 1.371633752244165) internal successors, (764), 564 states have internal predecessors, (764), 72 states have call successors, (72), 37 states have call predecessors, (72), 35 states have return successors, (69), 65 states have call predecessors, (69), 69 states have call successors, (69) [2022-11-03 02:44:59,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 905 transitions. [2022-11-03 02:44:59,195 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 905 transitions. Word has length 48 [2022-11-03 02:44:59,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:59,196 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 905 transitions. [2022-11-03 02:44:59,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 02:44:59,196 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 905 transitions. [2022-11-03 02:44:59,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 02:44:59,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:59,199 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:59,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:59,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:44:59,415 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:59,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:59,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1247774602, now seen corresponding path program 2 times [2022-11-03 02:44:59,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:59,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188614791] [2022-11-03 02:44:59,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:59,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:44:59,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:59,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188614791] [2022-11-03 02:44:59,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188614791] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:59,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:59,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:44:59,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369109355] [2022-11-03 02:44:59,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:59,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:44:59,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:59,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:44:59,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:44:59,488 INFO L87 Difference]: Start difference. First operand 666 states and 905 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 02:44:59,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:59,624 INFO L93 Difference]: Finished difference Result 996 states and 1338 transitions. [2022-11-03 02:44:59,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:44:59,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2022-11-03 02:44:59,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:59,629 INFO L225 Difference]: With dead ends: 996 [2022-11-03 02:44:59,629 INFO L226 Difference]: Without dead ends: 608 [2022-11-03 02:44:59,631 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 02:44:59,631 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 341 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:59,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 371 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:44:59,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-11-03 02:44:59,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 599. [2022-11-03 02:44:59,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 500 states have (on average 1.366) internal successors, (683), 508 states have internal predecessors, (683), 66 states have call successors, (66), 33 states have call predecessors, (66), 31 states have return successors, (63), 58 states have call predecessors, (63), 63 states have call successors, (63) [2022-11-03 02:44:59,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 812 transitions. [2022-11-03 02:44:59,678 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 812 transitions. Word has length 61 [2022-11-03 02:44:59,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:59,679 INFO L495 AbstractCegarLoop]: Abstraction has 599 states and 812 transitions. [2022-11-03 02:44:59,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 02:44:59,679 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 812 transitions. [2022-11-03 02:44:59,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:44:59,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:59,687 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 02:44:59,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:44:59,688 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:59,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:59,689 INFO L85 PathProgramCache]: Analyzing trace with hash 5025344, now seen corresponding path program 1 times [2022-11-03 02:44:59,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:59,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644544777] [2022-11-03 02:44:59,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:59,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:59,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:59,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644544777] [2022-11-03 02:44:59,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644544777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:59,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:59,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:44:59,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592730233] [2022-11-03 02:44:59,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:59,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:44:59,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:59,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:44:59,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:44:59,792 INFO L87 Difference]: Start difference. First operand 599 states and 812 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (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 02:45:00,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:00,213 INFO L93 Difference]: Finished difference Result 959 states and 1399 transitions. [2022-11-03 02:45:00,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:45:00,214 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (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 02:45:00,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:00,218 INFO L225 Difference]: With dead ends: 959 [2022-11-03 02:45:00,218 INFO L226 Difference]: Without dead ends: 773 [2022-11-03 02:45:00,220 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 02:45:00,221 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 576 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:00,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 923 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:45:00,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-11-03 02:45:00,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 772. [2022-11-03 02:45:00,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 645 states have (on average 1.3968992248062015) internal successors, (901), 654 states have internal predecessors, (901), 88 states have call successors, (88), 39 states have call predecessors, (88), 37 states have return successors, (85), 79 states have call predecessors, (85), 85 states have call successors, (85) [2022-11-03 02:45:00,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1074 transitions. [2022-11-03 02:45:00,285 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1074 transitions. Word has length 68 [2022-11-03 02:45:00,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:00,285 INFO L495 AbstractCegarLoop]: Abstraction has 772 states and 1074 transitions. [2022-11-03 02:45:00,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (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 02:45:00,286 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1074 transitions. [2022-11-03 02:45:00,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 02:45:00,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:00,288 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:00,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:45:00,289 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:00,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:00,289 INFO L85 PathProgramCache]: Analyzing trace with hash 426469534, now seen corresponding path program 1 times [2022-11-03 02:45:00,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:00,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858474217] [2022-11-03 02:45:00,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:00,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:45:00,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:00,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858474217] [2022-11-03 02:45:00,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858474217] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:00,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032376532] [2022-11-03 02:45:00,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:00,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:00,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:00,443 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:00,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:45:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:00,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:45:00,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:45:00,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:00,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032376532] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:00,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:00,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:45:00,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695249697] [2022-11-03 02:45:00,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:00,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:00,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:00,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:00,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:00,620 INFO L87 Difference]: Start difference. First operand 772 states and 1074 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-03 02:45:00,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:00,759 INFO L93 Difference]: Finished difference Result 899 states and 1233 transitions. [2022-11-03 02:45:00,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:00,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2022-11-03 02:45:00,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:00,763 INFO L225 Difference]: With dead ends: 899 [2022-11-03 02:45:00,763 INFO L226 Difference]: Without dead ends: 365 [2022-11-03 02:45:00,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:00,765 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 25 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:00,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 606 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:00,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-11-03 02:45:00,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2022-11-03 02:45:00,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 302 states have (on average 1.5198675496688743) internal successors, (459), 305 states have internal predecessors, (459), 50 states have call successors, (50), 13 states have call predecessors, (50), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2022-11-03 02:45:00,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 557 transitions. [2022-11-03 02:45:00,796 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 557 transitions. Word has length 73 [2022-11-03 02:45:00,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:00,797 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 557 transitions. [2022-11-03 02:45:00,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-03 02:45:00,797 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 557 transitions. [2022-11-03 02:45:00,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:45:00,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:00,799 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 02:45:00,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:01,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:01,022 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:01,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:01,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1718364477, now seen corresponding path program 1 times [2022-11-03 02:45:01,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:01,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453816630] [2022-11-03 02:45:01,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:01,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:01,249 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 02:45:01,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:01,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453816630] [2022-11-03 02:45:01,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453816630] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:01,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4993451] [2022-11-03 02:45:01,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:01,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:01,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:01,252 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:01,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:45:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:01,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:45:01,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:45:01,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:01,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4993451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:01,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:01,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:45:01,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731341254] [2022-11-03 02:45:01,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:01,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:01,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:01,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:01,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:01,575 INFO L87 Difference]: Start difference. First operand 365 states and 557 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (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 02:45:01,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:01,751 INFO L93 Difference]: Finished difference Result 1076 states and 1672 transitions. [2022-11-03 02:45:01,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:01,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (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 02:45:01,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:01,756 INFO L225 Difference]: With dead ends: 1076 [2022-11-03 02:45:01,756 INFO L226 Difference]: Without dead ends: 717 [2022-11-03 02:45:01,758 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 02:45:01,759 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 248 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:01,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 534 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:01,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-11-03 02:45:01,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 711. [2022-11-03 02:45:01,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 594 states have (on average 1.5185185185185186) internal successors, (902), 598 states have internal predecessors, (902), 92 states have call successors, (92), 25 states have call predecessors, (92), 24 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:45:01,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1084 transitions. [2022-11-03 02:45:01,813 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1084 transitions. Word has length 137 [2022-11-03 02:45:01,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:01,813 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 1084 transitions. [2022-11-03 02:45:01,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (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 02:45:01,814 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1084 transitions. [2022-11-03 02:45:01,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:45:01,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:01,817 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 02:45:01,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:02,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:02,031 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:02,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:02,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1747250717, now seen corresponding path program 1 times [2022-11-03 02:45:02,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:02,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185684525] [2022-11-03 02:45:02,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:02,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:02,228 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 02:45:02,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:02,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185684525] [2022-11-03 02:45:02,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185684525] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:02,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598470824] [2022-11-03 02:45:02,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:02,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:02,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:02,230 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:02,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:45:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:02,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:45:02,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 02:45:02,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:02,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598470824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:02,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:02,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:45:02,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375878478] [2022-11-03 02:45:02,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:02,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:02,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:02,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:02,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:02,531 INFO L87 Difference]: Start difference. First operand 711 states and 1084 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (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 02:45:02,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:02,775 INFO L93 Difference]: Finished difference Result 2108 states and 3271 transitions. [2022-11-03 02:45:02,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:02,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (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 02:45:02,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:02,783 INFO L225 Difference]: With dead ends: 2108 [2022-11-03 02:45:02,783 INFO L226 Difference]: Without dead ends: 1403 [2022-11-03 02:45:02,786 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 02:45:02,787 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 269 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:02,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 533 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:02,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2022-11-03 02:45:02,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1395. [2022-11-03 02:45:02,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1172 states have (on average 1.515358361774744) internal successors, (1776), 1178 states have internal predecessors, (1776), 174 states have call successors, (174), 49 states have call predecessors, (174), 48 states have return successors, (172), 168 states have call predecessors, (172), 172 states have call successors, (172) [2022-11-03 02:45:02,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 2122 transitions. [2022-11-03 02:45:02,896 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 2122 transitions. Word has length 137 [2022-11-03 02:45:02,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:02,896 INFO L495 AbstractCegarLoop]: Abstraction has 1395 states and 2122 transitions. [2022-11-03 02:45:02,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (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 02:45:02,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 2122 transitions. [2022-11-03 02:45:02,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:45:02,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:02,901 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 02:45:02,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-03 02:45:03,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 02:45:03,127 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:03,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:03,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1095890237, now seen corresponding path program 1 times [2022-11-03 02:45:03,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:03,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541797039] [2022-11-03 02:45:03,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:03,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:03,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:03,292 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 02:45:03,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:03,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541797039] [2022-11-03 02:45:03,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541797039] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:03,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357267345] [2022-11-03 02:45:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:03,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:03,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:03,295 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:03,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:45:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:03,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:45:03,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:03,587 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 02:45:03,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:03,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357267345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:03,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:03,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:45:03,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870343752] [2022-11-03 02:45:03,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:03,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:03,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:03,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:03,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:03,590 INFO L87 Difference]: Start difference. First operand 1395 states and 2122 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 02:45:03,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:03,919 INFO L93 Difference]: Finished difference Result 4148 states and 6419 transitions. [2022-11-03 02:45:03,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:03,920 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 02:45:03,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:03,933 INFO L225 Difference]: With dead ends: 4148 [2022-11-03 02:45:03,933 INFO L226 Difference]: Without dead ends: 2759 [2022-11-03 02:45:03,938 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 02:45:03,939 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 263 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:03,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 494 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:03,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2022-11-03 02:45:04,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 2747. [2022-11-03 02:45:04,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 2316 states have (on average 1.5112262521588946) internal successors, (3500), 2326 states have internal predecessors, (3500), 334 states have call successors, (334), 97 states have call predecessors, (334), 96 states have return successors, (332), 324 states have call predecessors, (332), 332 states have call successors, (332) [2022-11-03 02:45:04,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 4166 transitions. [2022-11-03 02:45:04,149 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 4166 transitions. Word has length 137 [2022-11-03 02:45:04,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:04,149 INFO L495 AbstractCegarLoop]: Abstraction has 2747 states and 4166 transitions. [2022-11-03 02:45:04,150 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 02:45:04,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 4166 transitions. [2022-11-03 02:45:04,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:45:04,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:04,157 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 02:45:04,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:04,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:04,372 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:04,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:04,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1508191139, now seen corresponding path program 1 times [2022-11-03 02:45:04,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:04,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615325006] [2022-11-03 02:45:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:04,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:04,594 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 02:45:04,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:04,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615325006] [2022-11-03 02:45:04,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615325006] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:04,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046106075] [2022-11-03 02:45:04,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:04,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:04,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:04,599 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:04,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:45:04,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:04,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:45:04,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:45:04,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:04,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046106075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:04,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:04,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:45:04,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204640791] [2022-11-03 02:45:04,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:04,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:04,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:04,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:04,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:04,901 INFO L87 Difference]: Start difference. First operand 2747 states and 4166 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (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 02:45:05,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:05,446 INFO L93 Difference]: Finished difference Result 8180 states and 12615 transitions. [2022-11-03 02:45:05,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:05,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (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 02:45:05,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:05,477 INFO L225 Difference]: With dead ends: 8180 [2022-11-03 02:45:05,477 INFO L226 Difference]: Without dead ends: 5439 [2022-11-03 02:45:05,486 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 02:45:05,487 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 260 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:05,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 494 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:05,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5439 states. [2022-11-03 02:45:05,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5439 to 5419. [2022-11-03 02:45:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5419 states, 4580 states have (on average 1.5065502183406114) internal successors, (6900), 4598 states have internal predecessors, (6900), 646 states have call successors, (646), 193 states have call predecessors, (646), 192 states have return successors, (644), 628 states have call predecessors, (644), 644 states have call successors, (644) [2022-11-03 02:45:05,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 8190 transitions. [2022-11-03 02:45:05,989 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 8190 transitions. Word has length 137 [2022-11-03 02:45:05,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:05,990 INFO L495 AbstractCegarLoop]: Abstraction has 5419 states and 8190 transitions. [2022-11-03 02:45:05,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (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 02:45:05,991 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 8190 transitions. [2022-11-03 02:45:06,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:45:06,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:06,004 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 02:45:06,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:06,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:45:06,231 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:06,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:06,231 INFO L85 PathProgramCache]: Analyzing trace with hash -680310467, now seen corresponding path program 1 times [2022-11-03 02:45:06,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:06,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788728451] [2022-11-03 02:45:06,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:06,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:06,428 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 02:45:06,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:06,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788728451] [2022-11-03 02:45:06,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788728451] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:06,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439734915] [2022-11-03 02:45:06,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:06,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:06,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:06,430 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:06,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:45:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:06,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:45:06,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:06,748 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 02:45:06,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:06,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439734915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:06,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:06,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:45:06,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864232248] [2022-11-03 02:45:06,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:06,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:06,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:06,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:06,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:06,751 INFO L87 Difference]: Start difference. First operand 5419 states and 8190 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 02:45:07,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:07,723 INFO L93 Difference]: Finished difference Result 16148 states and 24807 transitions. [2022-11-03 02:45:07,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:07,724 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 02:45:07,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:07,843 INFO L225 Difference]: With dead ends: 16148 [2022-11-03 02:45:07,843 INFO L226 Difference]: Without dead ends: 10735 [2022-11-03 02:45:07,858 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 02:45:07,859 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 242 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:07,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 494 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:07,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10735 states. [2022-11-03 02:45:08,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10735 to 10699. [2022-11-03 02:45:08,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10699 states, 9060 states have (on average 1.5015452538631346) internal successors, (13604), 9094 states have internal predecessors, (13604), 1254 states have call successors, (1254), 385 states have call predecessors, (1254), 384 states have return successors, (1252), 1220 states have call predecessors, (1252), 1252 states have call successors, (1252) [2022-11-03 02:45:08,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10699 states to 10699 states and 16110 transitions. [2022-11-03 02:45:08,851 INFO L78 Accepts]: Start accepts. Automaton has 10699 states and 16110 transitions. Word has length 137 [2022-11-03 02:45:08,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:08,851 INFO L495 AbstractCegarLoop]: Abstraction has 10699 states and 16110 transitions. [2022-11-03 02:45:08,852 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 02:45:08,853 INFO L276 IsEmpty]: Start isEmpty. Operand 10699 states and 16110 transitions. [2022-11-03 02:45:08,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:45:08,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:08,875 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 02:45:08,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:09,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:45:09,095 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:09,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:09,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1327942115, now seen corresponding path program 1 times [2022-11-03 02:45:09,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:09,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601913933] [2022-11-03 02:45:09,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:09,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:09,256 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 02:45:09,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:09,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601913933] [2022-11-03 02:45:09,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601913933] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:09,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096867928] [2022-11-03 02:45:09,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:09,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:09,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:09,258 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:09,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:45:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:09,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:45:09,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:45:09,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:09,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096867928] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:09,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:09,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:45:09,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220718930] [2022-11-03 02:45:09,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:09,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:09,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:09,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:09,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:09,564 INFO L87 Difference]: Start difference. First operand 10699 states and 16110 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (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 02:45:11,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:11,428 INFO L93 Difference]: Finished difference Result 31892 states and 48791 transitions. [2022-11-03 02:45:11,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:11,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (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 02:45:11,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:11,516 INFO L225 Difference]: With dead ends: 31892 [2022-11-03 02:45:11,517 INFO L226 Difference]: Without dead ends: 21199 [2022-11-03 02:45:11,553 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 02:45:11,554 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 254 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:11,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 494 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:11,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21199 states. [2022-11-03 02:45:13,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21199 to 21131. [2022-11-03 02:45:13,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21131 states, 17924 states have (on average 1.4963177862084356) internal successors, (26820), 17990 states have internal predecessors, (26820), 2438 states have call successors, (2438), 769 states have call predecessors, (2438), 768 states have return successors, (2436), 2372 states have call predecessors, (2436), 2436 states have call successors, (2436) [2022-11-03 02:45:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21131 states to 21131 states and 31694 transitions. [2022-11-03 02:45:13,656 INFO L78 Accepts]: Start accepts. Automaton has 21131 states and 31694 transitions. Word has length 137 [2022-11-03 02:45:13,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:13,657 INFO L495 AbstractCegarLoop]: Abstraction has 21131 states and 31694 transitions. [2022-11-03 02:45:13,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (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 02:45:13,657 INFO L276 IsEmpty]: Start isEmpty. Operand 21131 states and 31694 transitions. [2022-11-03 02:45:13,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:45:13,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:13,709 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 02:45:13,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:13,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 02:45:13,935 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:13,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:13,935 INFO L85 PathProgramCache]: Analyzing trace with hash 392352509, now seen corresponding path program 1 times [2022-11-03 02:45:13,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:13,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585073106] [2022-11-03 02:45:13,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:13,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:14,778 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 02:45:14,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:14,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585073106] [2022-11-03 02:45:14,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585073106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:14,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:14,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:45:14,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480208900] [2022-11-03 02:45:14,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:14,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:45:14,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:14,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:45:14,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:14,782 INFO L87 Difference]: Start difference. First operand 21131 states and 31694 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) [2022-11-03 02:45:18,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:18,932 INFO L93 Difference]: Finished difference Result 73875 states and 110805 transitions. [2022-11-03 02:45:18,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:45:18,933 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (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) Word has length 137 [2022-11-03 02:45:18,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:19,170 INFO L225 Difference]: With dead ends: 73875 [2022-11-03 02:45:19,170 INFO L226 Difference]: Without dead ends: 52751 [2022-11-03 02:45:19,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:45:19,231 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1075 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:19,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1096 Valid, 886 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:45:19,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52751 states. [2022-11-03 02:45:22,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52751 to 41483. [2022-11-03 02:45:23,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41483 states, 35204 states have (on average 1.4908533121236223) internal successors, (52484), 35334 states have internal predecessors, (52484), 4742 states have call successors, (4742), 1537 states have call predecessors, (4742), 1536 states have return successors, (4740), 4612 states have call predecessors, (4740), 4740 states have call successors, (4740) [2022-11-03 02:45:23,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41483 states to 41483 states and 61966 transitions. [2022-11-03 02:45:23,287 INFO L78 Accepts]: Start accepts. Automaton has 41483 states and 61966 transitions. Word has length 137 [2022-11-03 02:45:23,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:23,287 INFO L495 AbstractCegarLoop]: Abstraction has 41483 states and 61966 transitions. [2022-11-03 02:45:23,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (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) [2022-11-03 02:45:23,288 INFO L276 IsEmpty]: Start isEmpty. Operand 41483 states and 61966 transitions. [2022-11-03 02:45:23,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-03 02:45:23,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:23,347 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:45:23,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 02:45:23,347 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:23,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:23,348 INFO L85 PathProgramCache]: Analyzing trace with hash -193009968, now seen corresponding path program 1 times [2022-11-03 02:45:23,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:23,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750030624] [2022-11-03 02:45:23,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:23,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 02:45:23,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:23,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750030624] [2022-11-03 02:45:23,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750030624] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:23,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349186762] [2022-11-03 02:45:23,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:23,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:23,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:23,715 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:23,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:45:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:23,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:45:23,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 02:45:24,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:24,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349186762] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:24,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:24,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:45:24,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858075506] [2022-11-03 02:45:24,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:24,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:24,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:24,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:24,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:45:24,015 INFO L87 Difference]: Start difference. First operand 41483 states and 61966 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:45:27,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:27,897 INFO L93 Difference]: Finished difference Result 73679 states and 111953 transitions. [2022-11-03 02:45:27,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:27,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 159 [2022-11-03 02:45:27,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:28,155 INFO L225 Difference]: With dead ends: 73679 [2022-11-03 02:45:28,155 INFO L226 Difference]: Without dead ends: 52427 [2022-11-03 02:45:28,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:45:28,221 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 125 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:28,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 626 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:45:28,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52427 states. [2022-11-03 02:45:31,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52427 to 49419. [2022-11-03 02:45:32,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49419 states, 42884 states have (on average 1.5342785187948886) internal successors, (65796), 43014 states have internal predecessors, (65796), 4870 states have call successors, (4870), 1665 states have call predecessors, (4870), 1664 states have return successors, (4868), 4740 states have call predecessors, (4868), 4868 states have call successors, (4868) [2022-11-03 02:45:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49419 states to 49419 states and 75534 transitions. [2022-11-03 02:45:32,325 INFO L78 Accepts]: Start accepts. Automaton has 49419 states and 75534 transitions. Word has length 159 [2022-11-03 02:45:32,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:32,326 INFO L495 AbstractCegarLoop]: Abstraction has 49419 states and 75534 transitions. [2022-11-03 02:45:32,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:45:32,326 INFO L276 IsEmpty]: Start isEmpty. Operand 49419 states and 75534 transitions. [2022-11-03 02:45:32,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-03 02:45:32,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:32,432 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:45:32,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:32,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:45:32,647 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:32,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:32,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1064498787, now seen corresponding path program 1 times [2022-11-03 02:45:32,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:32,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345263704] [2022-11-03 02:45:32,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:32,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:32,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-03 02:45:33,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:33,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345263704] [2022-11-03 02:45:33,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345263704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:33,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9907446] [2022-11-03 02:45:33,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:33,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:33,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:33,073 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:33,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d398ebf-a3b6-4afd-8142-63aaa4d9ea3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:45:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:33,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 1322 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:45:33,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 02:45:33,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:33,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9907446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:33,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:33,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-11-03 02:45:33,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806242633] [2022-11-03 02:45:33,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:33,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:33,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:33,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:33,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:45:33,600 INFO L87 Difference]: Start difference. First operand 49419 states and 75534 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10)