./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS --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 dfe43dac9acec5d21450031b4b25696c02a17019cbc94a74a969e06371e0741b --- 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-8393723 [2022-11-19 07:12:40,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:12:40,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:12:40,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:12:40,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:12:40,781 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:12:40,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:12:40,787 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:12:40,789 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:12:40,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:12:40,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:12:40,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:12:40,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:12:40,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:12:40,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:12:40,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:12:40,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:12:40,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:12:40,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:12:40,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:12:40,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:12:40,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:12:40,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:12:40,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:12:40,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:12:40,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:12:40,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:12:40,837 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:12:40,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:12:40,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:12:40,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:12:40,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:12:40,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:12:40,844 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:12:40,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:12:40,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:12:40,847 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:12:40,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:12:40,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:12:40,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:12:40,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:12:40,850 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:12:40,887 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:12:40,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:12:40,888 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:12:40,889 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:12:40,890 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:12:40,890 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:12:40,890 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:12:40,891 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:12:40,891 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:12:40,891 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:12:40,892 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:12:40,892 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:12:40,893 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:12:40,893 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:12:40,893 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:12:40,893 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:12:40,893 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:12:40,894 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:12:40,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:12:40,895 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:12:40,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:12:40,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:12:40,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:12:40,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:12:40,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:12:40,897 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:12:40,898 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:12:40,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:12:40,898 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:12:40,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:12:40,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:12:40,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:12:40,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:12:40,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:12:40,900 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:12:40,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:12:40,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:12:40,900 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:12:40,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:12:40,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:12:40,901 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:12:40,901 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_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfe43dac9acec5d21450031b4b25696c02a17019cbc94a74a969e06371e0741b [2022-11-19 07:12:41,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:12:41,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:12:41,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:12:41,260 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:12:41,260 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:12:41,261 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2022-11-19 07:12:41,333 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/data/4d5d11e62/1d6f87ab1ced4f6e87b72948a6138007/FLAG42f6b88de [2022-11-19 07:12:41,918 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:12:41,919 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2022-11-19 07:12:41,933 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/data/4d5d11e62/1d6f87ab1ced4f6e87b72948a6138007/FLAG42f6b88de [2022-11-19 07:12:42,209 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/data/4d5d11e62/1d6f87ab1ced4f6e87b72948a6138007 [2022-11-19 07:12:42,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:12:42,214 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:12:42,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:12:42,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:12:42,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:12:42,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:12:42" (1/1) ... [2022-11-19 07:12:42,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d38b211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:42, skipping insertion in model container [2022-11-19 07:12:42,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:12:42" (1/1) ... [2022-11-19 07:12:42,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:12:42,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:12:42,523 WARN L234 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_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[914,927] [2022-11-19 07:12:42,575 WARN L234 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_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[7115,7128] [2022-11-19 07:12:42,652 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:12:42,664 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:12:42,681 WARN L234 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_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[914,927] [2022-11-19 07:12:42,699 WARN L234 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_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[7115,7128] [2022-11-19 07:12:42,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:12:42,770 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:12:42,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:42 WrapperNode [2022-11-19 07:12:42,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:12:42,772 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:12:42,772 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:12:42,772 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:12:42,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:42" (1/1) ... [2022-11-19 07:12:42,793 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:42" (1/1) ... [2022-11-19 07:12:42,834 INFO L138 Inliner]: procedures = 69, calls = 82, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 813 [2022-11-19 07:12:42,835 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:12:42,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:12:42,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:12:42,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:12:42,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:42" (1/1) ... [2022-11-19 07:12:42,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:42" (1/1) ... [2022-11-19 07:12:42,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:42" (1/1) ... [2022-11-19 07:12:42,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:42" (1/1) ... [2022-11-19 07:12:42,880 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:42" (1/1) ... [2022-11-19 07:12:42,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:42" (1/1) ... [2022-11-19 07:12:42,911 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:42" (1/1) ... [2022-11-19 07:12:42,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:42" (1/1) ... [2022-11-19 07:12:42,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:12:42,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:12:42,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:12:42,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:12:42,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:42" (1/1) ... [2022-11-19 07:12:42,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:12:42,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:42,961 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:12:42,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:12:43,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:12:43,007 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 07:12:43,008 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 07:12:43,008 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-19 07:12:43,008 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-19 07:12:43,008 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-19 07:12:43,008 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-19 07:12:43,008 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-19 07:12:43,008 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-19 07:12:43,009 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-19 07:12:43,009 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-19 07:12:43,009 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-19 07:12:43,009 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-19 07:12:43,009 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-19 07:12:43,009 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-19 07:12:43,010 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-19 07:12:43,010 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-19 07:12:43,010 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-19 07:12:43,010 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-19 07:12:43,010 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-19 07:12:43,010 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-19 07:12:43,010 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-19 07:12:43,011 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-19 07:12:43,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:12:43,011 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-19 07:12:43,011 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-19 07:12:43,011 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-19 07:12:43,011 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-19 07:12:43,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:12:43,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:12:43,012 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-19 07:12:43,012 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-19 07:12:43,012 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-19 07:12:43,012 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-19 07:12:43,132 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:12:43,135 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:12:44,023 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:12:44,441 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:12:44,441 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-19 07:12:44,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:12:44 BoogieIcfgContainer [2022-11-19 07:12:44,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:12:44,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:12:44,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:12:44,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:12:44,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:12:42" (1/3) ... [2022-11-19 07:12:44,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b17aeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:12:44, skipping insertion in model container [2022-11-19 07:12:44,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:42" (2/3) ... [2022-11-19 07:12:44,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b17aeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:12:44, skipping insertion in model container [2022-11-19 07:12:44,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:12:44" (3/3) ... [2022-11-19 07:12:44,454 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2022-11-19 07:12:44,474 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:12:44,475 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 07:12:44,577 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:12:44,588 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;@66658a07, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:12:44,589 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 07:12:44,595 INFO L276 IsEmpty]: Start isEmpty. Operand has 222 states, 166 states have (on average 1.536144578313253) internal successors, (255), 174 states have internal predecessors, (255), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-19 07:12:44,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:12:44,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:44,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:44,612 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:44,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:44,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1717664810, now seen corresponding path program 1 times [2022-11-19 07:12:44,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:44,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450763938] [2022-11-19 07:12:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:44,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:45,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:45,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450763938] [2022-11-19 07:12:45,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450763938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:45,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:12:45,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:12:45,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766243832] [2022-11-19 07:12:45,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:45,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:12:45,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:45,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:12:45,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:12:45,093 INFO L87 Difference]: Start difference. First operand has 222 states, 166 states have (on average 1.536144578313253) internal successors, (255), 174 states have internal predecessors, (255), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 07:12:45,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:45,501 INFO L93 Difference]: Finished difference Result 494 states and 733 transitions. [2022-11-19 07:12:45,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:12:45,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-19 07:12:45,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:45,515 INFO L225 Difference]: With dead ends: 494 [2022-11-19 07:12:45,516 INFO L226 Difference]: Without dead ends: 276 [2022-11-19 07:12:45,520 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 [2022-11-19 07:12:45,524 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 377 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:45,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 548 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:12:45,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-19 07:12:45,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 269. [2022-11-19 07:12:45,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 201 states have (on average 1.4328358208955223) internal successors, (288), 206 states have internal predecessors, (288), 46 states have call successors, (46), 22 states have call predecessors, (46), 20 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-11-19 07:12:45,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 376 transitions. [2022-11-19 07:12:45,600 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 376 transitions. Word has length 45 [2022-11-19 07:12:45,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:45,601 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 376 transitions. [2022-11-19 07:12:45,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 07:12:45,602 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 376 transitions. [2022-11-19 07:12:45,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:12:45,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:45,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:45,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:12:45,606 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:45,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:45,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1658327863, now seen corresponding path program 1 times [2022-11-19 07:12:45,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:45,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796438980] [2022-11-19 07:12:45,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:45,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:45,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:45,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796438980] [2022-11-19 07:12:45,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796438980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:45,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:12:45,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:12:45,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244219597] [2022-11-19 07:12:45,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:45,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:12:45,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:45,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:12:45,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:12:45,784 INFO L87 Difference]: Start difference. First operand 269 states and 376 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 07:12:46,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:46,573 INFO L93 Difference]: Finished difference Result 671 states and 879 transitions. [2022-11-19 07:12:46,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:12:46,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-19 07:12:46,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:46,583 INFO L225 Difference]: With dead ends: 671 [2022-11-19 07:12:46,583 INFO L226 Difference]: Without dead ends: 539 [2022-11-19 07:12:46,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:12:46,591 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 792 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:46,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 1001 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:12:46,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-11-19 07:12:46,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 455. [2022-11-19 07:12:46,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 333 states have (on average 1.3453453453453454) internal successors, (448), 339 states have internal predecessors, (448), 73 states have call successors, (73), 45 states have call predecessors, (73), 47 states have return successors, (73), 72 states have call predecessors, (73), 69 states have call successors, (73) [2022-11-19 07:12:46,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 594 transitions. [2022-11-19 07:12:46,664 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 594 transitions. Word has length 45 [2022-11-19 07:12:46,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:46,665 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 594 transitions. [2022-11-19 07:12:46,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 07:12:46,665 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 594 transitions. [2022-11-19 07:12:46,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 07:12:46,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:46,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:46,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:12:46,668 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:46,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:46,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1118233714, now seen corresponding path program 1 times [2022-11-19 07:12:46,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:46,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704468275] [2022-11-19 07:12:46,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:46,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:46,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:46,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704468275] [2022-11-19 07:12:46,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704468275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:46,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:12:46,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:12:46,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729011064] [2022-11-19 07:12:46,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:46,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:12:46,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:46,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:12:46,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:12:46,963 INFO L87 Difference]: Start difference. First operand 455 states and 594 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 07:12:47,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:47,837 INFO L93 Difference]: Finished difference Result 971 states and 1210 transitions. [2022-11-19 07:12:47,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:12:47,837 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-19 07:12:47,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:47,841 INFO L225 Difference]: With dead ends: 971 [2022-11-19 07:12:47,841 INFO L226 Difference]: Without dead ends: 669 [2022-11-19 07:12:47,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:12:47,844 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 451 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:47,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 809 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:12:47,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-11-19 07:12:47,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 634. [2022-11-19 07:12:47,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 458 states have (on average 1.3100436681222707) internal successors, (600), 465 states have internal predecessors, (600), 100 states have call successors, (100), 68 states have call predecessors, (100), 74 states have return successors, (104), 102 states have call predecessors, (104), 96 states have call successors, (104) [2022-11-19 07:12:47,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 804 transitions. [2022-11-19 07:12:47,920 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 804 transitions. Word has length 46 [2022-11-19 07:12:47,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:47,921 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 804 transitions. [2022-11-19 07:12:47,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 07:12:47,921 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 804 transitions. [2022-11-19 07:12:47,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 07:12:47,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:47,923 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:47,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:12:47,923 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:47,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:47,924 INFO L85 PathProgramCache]: Analyzing trace with hash 377291076, now seen corresponding path program 1 times [2022-11-19 07:12:47,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:47,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259922828] [2022-11-19 07:12:47,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:47,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:47,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:47,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:47,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259922828] [2022-11-19 07:12:47,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259922828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:47,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:12:47,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:12:47,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795411857] [2022-11-19 07:12:47,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:48,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:48,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:48,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:48,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:12:48,001 INFO L87 Difference]: Start difference. First operand 634 states and 804 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:12:48,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:48,179 INFO L93 Difference]: Finished difference Result 1198 states and 1474 transitions. [2022-11-19 07:12:48,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:48,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-19 07:12:48,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:48,184 INFO L225 Difference]: With dead ends: 1198 [2022-11-19 07:12:48,185 INFO L226 Difference]: Without dead ends: 766 [2022-11-19 07:12:48,186 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 [2022-11-19 07:12:48,187 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 67 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:48,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 514 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:12:48,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-11-19 07:12:48,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 661. [2022-11-19 07:12:48,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 481 states have (on average 1.2993762993762994) internal successors, (625), 488 states have internal predecessors, (625), 102 states have call successors, (102), 70 states have call predecessors, (102), 76 states have return successors, (106), 104 states have call predecessors, (106), 98 states have call successors, (106) [2022-11-19 07:12:48,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 833 transitions. [2022-11-19 07:12:48,264 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 833 transitions. Word has length 47 [2022-11-19 07:12:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:48,265 INFO L495 AbstractCegarLoop]: Abstraction has 661 states and 833 transitions. [2022-11-19 07:12:48,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:12:48,265 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 833 transitions. [2022-11-19 07:12:48,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 07:12:48,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:48,267 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:48,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:12:48,268 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:48,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:48,269 INFO L85 PathProgramCache]: Analyzing trace with hash 871306284, now seen corresponding path program 1 times [2022-11-19 07:12:48,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:48,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183218482] [2022-11-19 07:12:48,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:48,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:12:48,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:48,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183218482] [2022-11-19 07:12:48,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183218482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:48,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:12:48,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:12:48,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562604116] [2022-11-19 07:12:48,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:48,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:48,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:48,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:48,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:12:48,320 INFO L87 Difference]: Start difference. First operand 661 states and 833 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:12:48,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:48,491 INFO L93 Difference]: Finished difference Result 851 states and 1054 transitions. [2022-11-19 07:12:48,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:48,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-11-19 07:12:48,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:48,496 INFO L225 Difference]: With dead ends: 851 [2022-11-19 07:12:48,496 INFO L226 Difference]: Without dead ends: 578 [2022-11-19 07:12:48,497 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 [2022-11-19 07:12:48,498 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 282 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:48,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 335 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:12:48,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-11-19 07:12:48,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 469. [2022-11-19 07:12:48,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 341 states have (on average 1.2991202346041055) internal successors, (443), 346 states have internal predecessors, (443), 78 states have call successors, (78), 50 states have call predecessors, (78), 48 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-19 07:12:48,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 595 transitions. [2022-11-19 07:12:48,571 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 595 transitions. Word has length 53 [2022-11-19 07:12:48,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:48,572 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 595 transitions. [2022-11-19 07:12:48,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:12:48,572 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 595 transitions. [2022-11-19 07:12:48,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 07:12:48,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:48,574 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:48,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:12:48,575 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:48,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:48,575 INFO L85 PathProgramCache]: Analyzing trace with hash -647770964, now seen corresponding path program 1 times [2022-11-19 07:12:48,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:48,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739262615] [2022-11-19 07:12:48,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:48,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:48,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:48,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739262615] [2022-11-19 07:12:48,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739262615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:48,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:12:48,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:12:48,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098625755] [2022-11-19 07:12:48,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:48,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:12:48,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:48,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:12:48,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:12:48,656 INFO L87 Difference]: Start difference. First operand 469 states and 595 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 07:12:48,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:48,947 INFO L93 Difference]: Finished difference Result 572 states and 711 transitions. [2022-11-19 07:12:48,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:12:48,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-19 07:12:48,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:48,951 INFO L225 Difference]: With dead ends: 572 [2022-11-19 07:12:48,951 INFO L226 Difference]: Without dead ends: 569 [2022-11-19 07:12:48,952 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 [2022-11-19 07:12:48,953 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 513 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:48,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 311 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:12:48,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-11-19 07:12:49,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 468. [2022-11-19 07:12:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 341 states have (on average 1.2903225806451613) internal successors, (440), 345 states have internal predecessors, (440), 77 states have call successors, (77), 50 states have call predecessors, (77), 48 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-19 07:12:49,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 591 transitions. [2022-11-19 07:12:49,008 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 591 transitions. Word has length 54 [2022-11-19 07:12:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:49,009 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 591 transitions. [2022-11-19 07:12:49,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 07:12:49,009 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 591 transitions. [2022-11-19 07:12:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 07:12:49,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:49,011 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:49,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:12:49,011 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:49,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:49,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1392768557, now seen corresponding path program 1 times [2022-11-19 07:12:49,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:49,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881322190] [2022-11-19 07:12:49,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:49,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:49,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:49,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881322190] [2022-11-19 07:12:49,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881322190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:49,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483386157] [2022-11-19 07:12:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:49,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:49,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:49,198 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:49,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:12:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:49,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:12:49,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:49,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:12:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:49,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483386157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:12:49,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [370107033] [2022-11-19 07:12:50,000 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-19 07:12:50,001 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:12:50,006 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:12:50,016 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:12:50,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:12:57,412 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 165 for LOIs [2022-11-19 07:12:57,446 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 133 for LOIs [2022-11-19 07:12:57,466 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 161 for LOIs [2022-11-19 07:12:57,498 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 169 for LOIs [2022-11-19 07:12:58,136 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 165 for LOIs [2022-11-19 07:12:58,227 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 165 for LOIs [2022-11-19 07:12:58,313 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 165 for LOIs [2022-11-19 07:12:58,348 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 172 for LOIs [2022-11-19 07:12:58,383 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:13:29,005 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11880#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~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) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~p_dw_pc~0 1) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= 2 ~p_dw_st~0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:13:29,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:13:29,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:13:29,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-19 07:13:29,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696212155] [2022-11-19 07:13:29,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:13:29,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:13:29,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:29,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:13:29,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 07:13:29,009 INFO L87 Difference]: Start difference. First operand 468 states and 591 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-19 07:13:29,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:29,739 INFO L93 Difference]: Finished difference Result 1041 states and 1246 transitions. [2022-11-19 07:13:29,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:13:29,740 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 55 [2022-11-19 07:13:29,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:29,747 INFO L225 Difference]: With dead ends: 1041 [2022-11-19 07:13:29,748 INFO L226 Difference]: Without dead ends: 1038 [2022-11-19 07:13:29,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 07:13:29,751 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 497 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:29,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 1232 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:13:29,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-11-19 07:13:29,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 763. [2022-11-19 07:13:29,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 546 states have (on average 1.250915750915751) internal successors, (683), 550 states have internal predecessors, (683), 125 states have call successors, (125), 92 states have call predecessors, (125), 90 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2022-11-19 07:13:29,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 930 transitions. [2022-11-19 07:13:29,866 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 930 transitions. Word has length 55 [2022-11-19 07:13:29,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:29,867 INFO L495 AbstractCegarLoop]: Abstraction has 763 states and 930 transitions. [2022-11-19 07:13:29,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-19 07:13:29,867 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 930 transitions. [2022-11-19 07:13:29,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-19 07:13:29,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:29,869 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:29,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 07:13:30,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:30,075 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:30,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:30,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1225842540, now seen corresponding path program 2 times [2022-11-19 07:13:30,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:30,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408414422] [2022-11-19 07:13:30,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:30,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:30,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:30,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408414422] [2022-11-19 07:13:30,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408414422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:30,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:13:30,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:13:30,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733787810] [2022-11-19 07:13:30,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:30,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:13:30,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:30,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:13:30,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:13:30,122 INFO L87 Difference]: Start difference. First operand 763 states and 930 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 07:13:30,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:30,314 INFO L93 Difference]: Finished difference Result 1176 states and 1403 transitions. [2022-11-19 07:13:30,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:13:30,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 58 [2022-11-19 07:13:30,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:30,318 INFO L225 Difference]: With dead ends: 1176 [2022-11-19 07:13:30,318 INFO L226 Difference]: Without dead ends: 765 [2022-11-19 07:13:30,319 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 [2022-11-19 07:13:30,319 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 285 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:30,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 368 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:13:30,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-11-19 07:13:30,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 759. [2022-11-19 07:13:30,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 542 states have (on average 1.2380073800738007) internal successors, (671), 546 states have internal predecessors, (671), 125 states have call successors, (125), 92 states have call predecessors, (125), 90 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2022-11-19 07:13:30,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 918 transitions. [2022-11-19 07:13:30,412 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 918 transitions. Word has length 58 [2022-11-19 07:13:30,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:30,413 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 918 transitions. [2022-11-19 07:13:30,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 07:13:30,413 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 918 transitions. [2022-11-19 07:13:30,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-19 07:13:30,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:30,415 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] [2022-11-19 07:13:30,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:13:30,415 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:30,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:30,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1811806047, now seen corresponding path program 1 times [2022-11-19 07:13:30,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:30,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685783779] [2022-11-19 07:13:30,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:30,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:30,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:30,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685783779] [2022-11-19 07:13:30,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685783779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:30,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:13:30,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:13:30,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171924239] [2022-11-19 07:13:30,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:30,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:13:30,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:30,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:13:30,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:13:30,523 INFO L87 Difference]: Start difference. First operand 759 states and 918 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2022-11-19 07:13:31,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:31,435 INFO L93 Difference]: Finished difference Result 1427 states and 2005 transitions. [2022-11-19 07:13:31,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:13:31,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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 56 [2022-11-19 07:13:31,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:31,442 INFO L225 Difference]: With dead ends: 1427 [2022-11-19 07:13:31,442 INFO L226 Difference]: Without dead ends: 1285 [2022-11-19 07:13:31,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:13:31,444 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 1083 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:31,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1096 Valid, 1127 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:13:31,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2022-11-19 07:13:31,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1272. [2022-11-19 07:13:31,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 962 states have (on average 1.3544698544698546) internal successors, (1303), 969 states have internal predecessors, (1303), 194 states have call successors, (194), 116 states have call predecessors, (194), 114 states have return successors, (237), 188 states have call predecessors, (237), 191 states have call successors, (237) [2022-11-19 07:13:31,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1734 transitions. [2022-11-19 07:13:31,615 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1734 transitions. Word has length 56 [2022-11-19 07:13:31,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:31,615 INFO L495 AbstractCegarLoop]: Abstraction has 1272 states and 1734 transitions. [2022-11-19 07:13:31,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2022-11-19 07:13:31,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1734 transitions. [2022-11-19 07:13:31,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 07:13:31,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:31,617 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:31,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:13:31,617 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:31,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:31,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1279350032, now seen corresponding path program 1 times [2022-11-19 07:13:31,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:31,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385987473] [2022-11-19 07:13:31,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:31,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:13:31,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:31,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385987473] [2022-11-19 07:13:31,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385987473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:31,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:13:31,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:13:31,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476105397] [2022-11-19 07:13:31,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:31,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:13:31,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:31,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:13:31,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:13:31,663 INFO L87 Difference]: Start difference. First operand 1272 states and 1734 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:13:31,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:31,920 INFO L93 Difference]: Finished difference Result 1891 states and 2444 transitions. [2022-11-19 07:13:31,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:13:31,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-19 07:13:31,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:31,928 INFO L225 Difference]: With dead ends: 1891 [2022-11-19 07:13:31,928 INFO L226 Difference]: Without dead ends: 1528 [2022-11-19 07:13:31,930 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 [2022-11-19 07:13:31,930 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 42 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:31,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 550 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:13:31,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2022-11-19 07:13:32,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1347. [2022-11-19 07:13:32,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1023 states have (on average 1.3470185728250244) internal successors, (1378), 1030 states have internal predecessors, (1378), 201 states have call successors, (201), 123 states have call predecessors, (201), 121 states have return successors, (244), 195 states have call predecessors, (244), 198 states have call successors, (244) [2022-11-19 07:13:32,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 1823 transitions. [2022-11-19 07:13:32,095 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 1823 transitions. Word has length 61 [2022-11-19 07:13:32,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:32,095 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 1823 transitions. [2022-11-19 07:13:32,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:13:32,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 1823 transitions. [2022-11-19 07:13:32,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 07:13:32,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:32,098 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:32,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:13:32,098 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:32,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:32,099 INFO L85 PathProgramCache]: Analyzing trace with hash -983373549, now seen corresponding path program 1 times [2022-11-19 07:13:32,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:32,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939627602] [2022-11-19 07:13:32,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:32,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:13:32,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:32,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939627602] [2022-11-19 07:13:32,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939627602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:32,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:13:32,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:13:32,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3486309] [2022-11-19 07:13:32,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:32,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:13:32,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:32,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:13:32,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:13:32,263 INFO L87 Difference]: Start difference. First operand 1347 states and 1823 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:13:33,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:33,188 INFO L93 Difference]: Finished difference Result 2396 states and 3006 transitions. [2022-11-19 07:13:33,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:13:33,188 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 70 [2022-11-19 07:13:33,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:33,196 INFO L225 Difference]: With dead ends: 2396 [2022-11-19 07:13:33,196 INFO L226 Difference]: Without dead ends: 1715 [2022-11-19 07:13:33,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:13:33,199 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 433 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:33,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 918 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:13:33,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2022-11-19 07:13:33,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1666. [2022-11-19 07:13:33,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1237 states have (on average 1.3047696038803558) internal successors, (1614), 1244 states have internal predecessors, (1614), 257 states have call successors, (257), 172 states have call predecessors, (257), 170 states have return successors, (300), 251 states have call predecessors, (300), 254 states have call successors, (300) [2022-11-19 07:13:33,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2171 transitions. [2022-11-19 07:13:33,445 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2171 transitions. Word has length 70 [2022-11-19 07:13:33,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:33,445 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 2171 transitions. [2022-11-19 07:13:33,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:13:33,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2171 transitions. [2022-11-19 07:13:33,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-19 07:13:33,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:33,453 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:33,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:13:33,453 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:33,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:33,453 INFO L85 PathProgramCache]: Analyzing trace with hash -462296564, now seen corresponding path program 1 times [2022-11-19 07:13:33,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:33,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217935044] [2022-11-19 07:13:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:33,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:13:33,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:33,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217935044] [2022-11-19 07:13:33,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217935044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:33,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:13:33,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:13:33,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851066383] [2022-11-19 07:13:33,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:33,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:13:33,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:33,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:13:33,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:13:33,542 INFO L87 Difference]: Start difference. First operand 1666 states and 2171 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:13:33,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:33,878 INFO L93 Difference]: Finished difference Result 2632 states and 3265 transitions. [2022-11-19 07:13:33,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:13:33,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-11-19 07:13:33,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:33,887 INFO L225 Difference]: With dead ends: 2632 [2022-11-19 07:13:33,888 INFO L226 Difference]: Without dead ends: 1842 [2022-11-19 07:13:33,890 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 [2022-11-19 07:13:33,891 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 37 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:33,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 544 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:13:33,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2022-11-19 07:13:34,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1713. [2022-11-19 07:13:34,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1276 states have (on average 1.3009404388714734) internal successors, (1660), 1283 states have internal predecessors, (1660), 261 states have call successors, (261), 176 states have call predecessors, (261), 174 states have return successors, (304), 255 states have call predecessors, (304), 258 states have call successors, (304) [2022-11-19 07:13:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 2225 transitions. [2022-11-19 07:13:34,143 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 2225 transitions. Word has length 71 [2022-11-19 07:13:34,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:34,144 INFO L495 AbstractCegarLoop]: Abstraction has 1713 states and 2225 transitions. [2022-11-19 07:13:34,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:13:34,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 2225 transitions. [2022-11-19 07:13:34,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-19 07:13:34,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:34,147 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:34,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 07:13:34,147 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:34,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:34,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1326549782, now seen corresponding path program 1 times [2022-11-19 07:13:34,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:34,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108549811] [2022-11-19 07:13:34,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:34,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:34,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:34,517 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 07:13:34,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:34,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108549811] [2022-11-19 07:13:34,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108549811] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:34,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803522499] [2022-11-19 07:13:34,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:34,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:34,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:34,521 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:34,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:13:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:34,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:13:34,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:13:34,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:34,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803522499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:34,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:13:34,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-19 07:13:34,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975105831] [2022-11-19 07:13:34,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:34,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:13:34,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:34,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:13:34,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:13:34,743 INFO L87 Difference]: Start difference. First operand 1713 states and 2225 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 07:13:35,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:35,229 INFO L93 Difference]: Finished difference Result 2577 states and 3230 transitions. [2022-11-19 07:13:35,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:13:35,230 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-19 07:13:35,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:35,237 INFO L225 Difference]: With dead ends: 2577 [2022-11-19 07:13:35,237 INFO L226 Difference]: Without dead ends: 1530 [2022-11-19 07:13:35,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:13:35,240 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 280 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:35,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 1139 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:13:35,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2022-11-19 07:13:35,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1345. [2022-11-19 07:13:35,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1039 states have (on average 1.3378248315688162) internal successors, (1390), 1046 states have internal predecessors, (1390), 190 states have call successors, (190), 116 states have call predecessors, (190), 114 states have return successors, (233), 184 states have call predecessors, (233), 187 states have call successors, (233) [2022-11-19 07:13:35,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1813 transitions. [2022-11-19 07:13:35,416 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1813 transitions. Word has length 102 [2022-11-19 07:13:35,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:35,417 INFO L495 AbstractCegarLoop]: Abstraction has 1345 states and 1813 transitions. [2022-11-19 07:13:35,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 07:13:35,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1813 transitions. [2022-11-19 07:13:35,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 07:13:35,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:35,420 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:35,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:35,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:13:35,625 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:35,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:35,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1978668510, now seen corresponding path program 1 times [2022-11-19 07:13:35,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:35,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418284109] [2022-11-19 07:13:35,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:35,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 07:13:35,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:35,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418284109] [2022-11-19 07:13:35,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418284109] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:35,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091879019] [2022-11-19 07:13:35,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:35,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:35,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:35,841 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:35,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:13:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:36,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:13:36,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:13:36,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:36,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091879019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:36,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:13:36,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-19 07:13:36,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716472861] [2022-11-19 07:13:36,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:36,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:13:36,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:36,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:13:36,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:13:36,139 INFO L87 Difference]: Start difference. First operand 1345 states and 1813 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 07:13:36,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:36,604 INFO L93 Difference]: Finished difference Result 1894 states and 2438 transitions. [2022-11-19 07:13:36,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:13:36,604 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-19 07:13:36,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:36,610 INFO L225 Difference]: With dead ends: 1894 [2022-11-19 07:13:36,611 INFO L226 Difference]: Without dead ends: 1301 [2022-11-19 07:13:36,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:13:36,613 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 71 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:36,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1451 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:13:36,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2022-11-19 07:13:36,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1209. [2022-11-19 07:13:36,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 939 states have (on average 1.3556975505857296) internal successors, (1273), 946 states have internal predecessors, (1273), 171 states have call successors, (171), 99 states have call predecessors, (171), 97 states have return successors, (214), 165 states have call predecessors, (214), 168 states have call successors, (214) [2022-11-19 07:13:36,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1658 transitions. [2022-11-19 07:13:36,785 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1658 transitions. Word has length 112 [2022-11-19 07:13:36,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:36,785 INFO L495 AbstractCegarLoop]: Abstraction has 1209 states and 1658 transitions. [2022-11-19 07:13:36,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 07:13:36,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1658 transitions. [2022-11-19 07:13:36,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-19 07:13:36,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:36,789 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:36,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:36,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:36,996 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:36,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:36,997 INFO L85 PathProgramCache]: Analyzing trace with hash -35244330, now seen corresponding path program 1 times [2022-11-19 07:13:36,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:36,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16779280] [2022-11-19 07:13:36,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:36,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 07:13:37,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:37,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16779280] [2022-11-19 07:13:37,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16779280] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:37,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046224875] [2022-11-19 07:13:37,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:37,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:37,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:37,209 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:37,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:13:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:37,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:13:37,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:13:37,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:37,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046224875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:37,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:13:37,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-19 07:13:37,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884047552] [2022-11-19 07:13:37,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:37,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:13:37,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:37,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:13:37,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:13:37,444 INFO L87 Difference]: Start difference. First operand 1209 states and 1658 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 07:13:37,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:37,869 INFO L93 Difference]: Finished difference Result 1958 states and 2503 transitions. [2022-11-19 07:13:37,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:13:37,870 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-19 07:13:37,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:37,877 INFO L225 Difference]: With dead ends: 1958 [2022-11-19 07:13:37,877 INFO L226 Difference]: Without dead ends: 1501 [2022-11-19 07:13:37,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:13:37,880 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 265 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:37,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 1222 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:13:37,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-11-19 07:13:38,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1467. [2022-11-19 07:13:38,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1101 states have (on average 1.3197093551316985) internal successors, (1453), 1114 states have internal predecessors, (1453), 219 states have call successors, (219), 141 states have call predecessors, (219), 145 states have return successors, (274), 213 states have call predecessors, (274), 216 states have call successors, (274) [2022-11-19 07:13:38,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 1946 transitions. [2022-11-19 07:13:38,127 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 1946 transitions. Word has length 113 [2022-11-19 07:13:38,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:38,128 INFO L495 AbstractCegarLoop]: Abstraction has 1467 states and 1946 transitions. [2022-11-19 07:13:38,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 07:13:38,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 1946 transitions. [2022-11-19 07:13:38,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 07:13:38,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:38,131 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:38,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:38,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:13:38,337 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:38,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:38,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1194020130, now seen corresponding path program 1 times [2022-11-19 07:13:38,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:38,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609495300] [2022-11-19 07:13:38,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:38,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:13:39,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:39,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609495300] [2022-11-19 07:13:39,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609495300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:39,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008384872] [2022-11-19 07:13:39,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:39,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:39,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:39,252 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:39,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:13:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:39,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-19 07:13:39,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:13:40,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:13:42,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008384872] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:13:42,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1251044358] [2022-11-19 07:13:42,417 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-19 07:13:42,417 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:13:42,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:13:42,418 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:13:42,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:14:29,235 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 304 for LOIs [2022-11-19 07:14:30,168 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 256 for LOIs [2022-11-19 07:14:30,252 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 249 for LOIs [2022-11-19 07:14:30,337 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 316 for LOIs [2022-11-19 07:14:32,900 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 184 for LOIs [2022-11-19 07:14:33,207 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 133 for LOIs [2022-11-19 07:14:33,510 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 308 for LOIs [2022-11-19 07:14:34,090 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 331 for LOIs [2022-11-19 07:14:34,621 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:15:51,868 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '55049#(and (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (= ~t7_i~0 0) (<= ~q_buf_0~0 2147483647) (= 0 ~t8_pc~0) (<= ~p_dw_pc~0 1) (= ~T4_E~0 2) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (<= 0 ~t6_st~0) (<= 0 ~local~0) (= 0 ~t4_st~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (= ~T5_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= 1 ~q_req_up~0) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (= 0 ~t5_st~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (= ~E_3~0 2) (<= ~t7_pc~0 0) (<= ~t1_pc~0 0) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 2 ~T8_E~0) (<= 1 ~c_dr_st~0) (<= ~local~0 0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= 0 (+ ~p_last_write~0 2147483648)) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= 0 (+ ~q_buf_0~0 2147483648)) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~q_req_up~0 1) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~t3_i~0 0) (<= 0 ~t6_pc~0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (<= ~p_last_write~0 2147483647) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= ~t7_st~0 0) (<= ~E_8~0 2) (<= 2 ~E_5~0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (<= ~t6_st~0 0) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:15:51,868 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:15:51,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:15:51,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 49 [2022-11-19 07:15:51,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260878626] [2022-11-19 07:15:51,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:15:51,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-19 07:15:51,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:15:51,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-19 07:15:51,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=10149, Unknown=0, NotChecked=0, Total=10920 [2022-11-19 07:15:51,875 INFO L87 Difference]: Start difference. First operand 1467 states and 1946 transitions. Second operand has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-19 07:16:14,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:14,295 INFO L93 Difference]: Finished difference Result 3757 states and 4600 transitions. [2022-11-19 07:16:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2022-11-19 07:16:14,298 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) Word has length 114 [2022-11-19 07:16:14,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:14,312 INFO L225 Difference]: With dead ends: 3757 [2022-11-19 07:16:14,312 INFO L226 Difference]: Without dead ends: 3042 [2022-11-19 07:16:14,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 288 SyntacticMatches, 6 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40846 ImplicationChecksByTransitivity, 94.1s TimeCoverageRelationStatistics Valid=9166, Invalid=89744, Unknown=0, NotChecked=0, Total=98910 [2022-11-19 07:16:14,332 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 4258 mSDsluCounter, 3437 mSDsCounter, 0 mSdLazyCounter, 8273 mSolverCounterSat, 1993 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4260 SdHoareTripleChecker+Valid, 3667 SdHoareTripleChecker+Invalid, 10266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1993 IncrementalHoareTripleChecker+Valid, 8273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:14,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4260 Valid, 3667 Invalid, 10266 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1993 Valid, 8273 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-19 07:16:14,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2022-11-19 07:16:14,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 1743. [2022-11-19 07:16:14,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1285 states have (on average 1.2949416342412452) internal successors, (1664), 1300 states have internal predecessors, (1664), 264 states have call successors, (264), 178 states have call predecessors, (264), 192 states have return successors, (331), 266 states have call predecessors, (331), 261 states have call successors, (331) [2022-11-19 07:16:14,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 2259 transitions. [2022-11-19 07:16:14,712 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 2259 transitions. Word has length 114 [2022-11-19 07:16:14,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:14,715 INFO L495 AbstractCegarLoop]: Abstraction has 1743 states and 2259 transitions. [2022-11-19 07:16:14,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-19 07:16:14,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 2259 transitions. [2022-11-19 07:16:14,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-19 07:16:14,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:14,719 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:14,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:16:14,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 07:16:14,925 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:14,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:14,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1348825369, now seen corresponding path program 1 times [2022-11-19 07:16:14,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:14,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513076587] [2022-11-19 07:16:14,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:14,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:16:15,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:15,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513076587] [2022-11-19 07:16:15,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513076587] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:15,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630085153] [2022-11-19 07:16:15,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:15,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:15,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:15,391 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:15,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:16:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:15,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:16:15,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:15,632 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:16:15,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:16:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:16:15,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630085153] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:15,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:16:15,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-19 07:16:15,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461984155] [2022-11-19 07:16:15,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:15,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:16:15,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:15,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:16:15,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:16:15,864 INFO L87 Difference]: Start difference. First operand 1743 states and 2259 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:16:16,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:16,920 INFO L93 Difference]: Finished difference Result 3067 states and 3807 transitions. [2022-11-19 07:16:16,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:16:16,921 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-19 07:16:16,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:16,933 INFO L225 Difference]: With dead ends: 3067 [2022-11-19 07:16:16,933 INFO L226 Difference]: Without dead ends: 2076 [2022-11-19 07:16:16,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-19 07:16:16,937 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 444 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:16,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 531 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:16:16,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2022-11-19 07:16:17,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1823. [2022-11-19 07:16:17,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1823 states, 1330 states have (on average 1.2894736842105263) internal successors, (1715), 1348 states have internal predecessors, (1715), 283 states have call successors, (283), 187 states have call predecessors, (283), 208 states have return successors, (371), 289 states have call predecessors, (371), 280 states have call successors, (371) [2022-11-19 07:16:17,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1823 states to 1823 states and 2369 transitions. [2022-11-19 07:16:17,402 INFO L78 Accepts]: Start accepts. Automaton has 1823 states and 2369 transitions. Word has length 115 [2022-11-19 07:16:17,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:17,403 INFO L495 AbstractCegarLoop]: Abstraction has 1823 states and 2369 transitions. [2022-11-19 07:16:17,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:16:17,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1823 states and 2369 transitions. [2022-11-19 07:16:17,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 07:16:17,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:17,407 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:17,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:16:17,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 07:16:17,614 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:17,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:17,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1267765248, now seen corresponding path program 1 times [2022-11-19 07:16:17,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:17,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146007238] [2022-11-19 07:16:17,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:17,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:16:17,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:17,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146007238] [2022-11-19 07:16:17,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146007238] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:17,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086568406] [2022-11-19 07:16:17,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:17,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:17,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:17,769 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:17,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:16:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:17,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:16:17,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 07:16:18,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:16:18,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086568406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:18,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:16:18,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:16:18,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015249551] [2022-11-19 07:16:18,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:18,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:18,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:18,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:18,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:16:18,019 INFO L87 Difference]: Start difference. First operand 1823 states and 2369 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 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) [2022-11-19 07:16:18,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:18,519 INFO L93 Difference]: Finished difference Result 3117 states and 4493 transitions. [2022-11-19 07:16:18,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:18,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 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 109 [2022-11-19 07:16:18,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:18,532 INFO L225 Difference]: With dead ends: 3117 [2022-11-19 07:16:18,532 INFO L226 Difference]: Without dead ends: 2462 [2022-11-19 07:16:18,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:16:18,537 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 281 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:18,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 445 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:16:18,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2022-11-19 07:16:18,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 2453. [2022-11-19 07:16:18,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 1848 states have (on average 1.3474025974025974) internal successors, (2490), 1869 states have internal predecessors, (2490), 365 states have call successors, (365), 217 states have call predecessors, (365), 238 states have return successors, (495), 368 states have call predecessors, (495), 362 states have call successors, (495) [2022-11-19 07:16:18,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3350 transitions. [2022-11-19 07:16:18,987 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3350 transitions. Word has length 109 [2022-11-19 07:16:18,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:18,988 INFO L495 AbstractCegarLoop]: Abstraction has 2453 states and 3350 transitions. [2022-11-19 07:16:18,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 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) [2022-11-19 07:16:18,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3350 transitions. [2022-11-19 07:16:18,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 07:16:18,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:18,992 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:19,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:16:19,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:16:19,199 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:19,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:19,199 INFO L85 PathProgramCache]: Analyzing trace with hash 365418080, now seen corresponding path program 1 times [2022-11-19 07:16:19,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:19,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841044127] [2022-11-19 07:16:19,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:19,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:16:19,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:19,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841044127] [2022-11-19 07:16:19,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841044127] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:19,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87434636] [2022-11-19 07:16:19,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:19,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:19,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:19,312 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:19,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:16:19,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:19,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:16:19,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:16:19,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:16:19,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87434636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:19,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:16:19,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:16:19,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131496195] [2022-11-19 07:16:19,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:19,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:19,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:19,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:19,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:16:19,575 INFO L87 Difference]: Start difference. First operand 2453 states and 3350 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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) [2022-11-19 07:16:20,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:20,256 INFO L93 Difference]: Finished difference Result 4992 states and 7492 transitions. [2022-11-19 07:16:20,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:20,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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 109 [2022-11-19 07:16:20,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:20,275 INFO L225 Difference]: With dead ends: 4992 [2022-11-19 07:16:20,275 INFO L226 Difference]: Without dead ends: 3707 [2022-11-19 07:16:20,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:16:20,282 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 278 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:20,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 445 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:16:20,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3707 states. [2022-11-19 07:16:20,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3707 to 3693. [2022-11-19 07:16:20,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3693 states, 2869 states have (on average 1.397699546880446) internal successors, (4010), 2896 states have internal predecessors, (4010), 524 states have call successors, (524), 277 states have call predecessors, (524), 298 states have return successors, (734), 521 states have call predecessors, (734), 521 states have call successors, (734) [2022-11-19 07:16:20,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3693 states to 3693 states and 5268 transitions. [2022-11-19 07:16:20,881 INFO L78 Accepts]: Start accepts. Automaton has 3693 states and 5268 transitions. Word has length 109 [2022-11-19 07:16:20,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:20,882 INFO L495 AbstractCegarLoop]: Abstraction has 3693 states and 5268 transitions. [2022-11-19 07:16:20,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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) [2022-11-19 07:16:20,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3693 states and 5268 transitions. [2022-11-19 07:16:20,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 07:16:20,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:20,889 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:20,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:16:21,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:21,095 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:21,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:21,096 INFO L85 PathProgramCache]: Analyzing trace with hash 802163712, now seen corresponding path program 1 times [2022-11-19 07:16:21,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:21,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541037781] [2022-11-19 07:16:21,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:21,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:16:21,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:21,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541037781] [2022-11-19 07:16:21,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541037781] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:21,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369039823] [2022-11-19 07:16:21,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:21,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:21,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:21,261 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:21,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:16:21,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:21,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:16:21,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:16:21,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:16:21,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369039823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:21,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:16:21,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:16:21,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379265279] [2022-11-19 07:16:21,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:21,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:21,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:21,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:21,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:16:21,522 INFO L87 Difference]: Start difference. First operand 3693 states and 5268 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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) [2022-11-19 07:16:22,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:22,338 INFO L93 Difference]: Finished difference Result 8682 states and 13349 transitions. [2022-11-19 07:16:22,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:22,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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 109 [2022-11-19 07:16:22,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:22,368 INFO L225 Difference]: With dead ends: 8682 [2022-11-19 07:16:22,368 INFO L226 Difference]: Without dead ends: 6157 [2022-11-19 07:16:22,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:16:22,379 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 266 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:22,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 445 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:16:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6157 states. [2022-11-19 07:16:23,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6157 to 6133. [2022-11-19 07:16:23,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6133 states, 4881 states have (on average 1.4320835894283959) internal successors, (6990), 4920 states have internal predecessors, (6990), 832 states have call successors, (832), 397 states have call predecessors, (832), 418 states have return successors, (1194), 817 states have call predecessors, (1194), 829 states have call successors, (1194) [2022-11-19 07:16:23,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6133 states to 6133 states and 9016 transitions. [2022-11-19 07:16:23,220 INFO L78 Accepts]: Start accepts. Automaton has 6133 states and 9016 transitions. Word has length 109 [2022-11-19 07:16:23,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:23,220 INFO L495 AbstractCegarLoop]: Abstraction has 6133 states and 9016 transitions. [2022-11-19 07:16:23,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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) [2022-11-19 07:16:23,220 INFO L276 IsEmpty]: Start isEmpty. Operand 6133 states and 9016 transitions. [2022-11-19 07:16:23,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 07:16:23,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:23,230 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:23,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:16:23,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:23,437 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:23,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:23,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1497608608, now seen corresponding path program 1 times [2022-11-19 07:16:23,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:23,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278563163] [2022-11-19 07:16:23,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:23,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:16:23,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:23,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278563163] [2022-11-19 07:16:23,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278563163] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:23,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329696496] [2022-11-19 07:16:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:23,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:23,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:23,562 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:23,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:16:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:23,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:16:23,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:16:23,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:16:23,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329696496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:23,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:16:23,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:16:23,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851063583] [2022-11-19 07:16:23,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:23,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:23,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:23,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:23,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:16:23,805 INFO L87 Difference]: Start difference. First operand 6133 states and 9016 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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) [2022-11-19 07:16:25,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:25,254 INFO L93 Difference]: Finished difference Result 15942 states and 24781 transitions. [2022-11-19 07:16:25,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:25,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 109 [2022-11-19 07:16:25,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:25,299 INFO L225 Difference]: With dead ends: 15942 [2022-11-19 07:16:25,300 INFO L226 Difference]: Without dead ends: 10977 [2022-11-19 07:16:25,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:16:25,320 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 272 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:25,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 445 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:16:25,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10977 states. [2022-11-19 07:16:26,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10977 to 10933. [2022-11-19 07:16:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10933 states, 8845 states have (on average 1.4505370265686828) internal successors, (12830), 8908 states have internal predecessors, (12830), 1428 states have call successors, (1428), 637 states have call predecessors, (1428), 658 states have return successors, (2078), 1389 states have call predecessors, (2078), 1425 states have call successors, (2078) [2022-11-19 07:16:26,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10933 states to 10933 states and 16336 transitions. [2022-11-19 07:16:26,782 INFO L78 Accepts]: Start accepts. Automaton has 10933 states and 16336 transitions. Word has length 109 [2022-11-19 07:16:26,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:26,783 INFO L495 AbstractCegarLoop]: Abstraction has 10933 states and 16336 transitions. [2022-11-19 07:16:26,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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) [2022-11-19 07:16:26,783 INFO L276 IsEmpty]: Start isEmpty. Operand 10933 states and 16336 transitions. [2022-11-19 07:16:26,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 07:16:26,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:26,797 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:26,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:16:27,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:27,003 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:27,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:27,003 INFO L85 PathProgramCache]: Analyzing trace with hash -728981696, now seen corresponding path program 1 times [2022-11-19 07:16:27,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:27,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408050808] [2022-11-19 07:16:27,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:27,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 07:16:27,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:27,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408050808] [2022-11-19 07:16:27,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408050808] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:27,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:27,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:16:27,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163720342] [2022-11-19 07:16:27,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:27,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:27,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:27,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:27,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:16:27,089 INFO L87 Difference]: Start difference. First operand 10933 states and 16336 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:16:29,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:29,237 INFO L93 Difference]: Finished difference Result 20985 states and 32499 transitions. [2022-11-19 07:16:29,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:29,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 109 [2022-11-19 07:16:29,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:29,305 INFO L225 Difference]: With dead ends: 20985 [2022-11-19 07:16:29,305 INFO L226 Difference]: Without dead ends: 13141 [2022-11-19 07:16:29,333 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 [2022-11-19 07:16:29,334 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 92 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:29,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 615 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:16:29,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13141 states. [2022-11-19 07:16:31,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13141 to 12357. [2022-11-19 07:16:31,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12357 states, 10205 states have (on average 1.487702106810387) internal successors, (15182), 10268 states have internal predecessors, (15182), 1460 states have call successors, (1460), 669 states have call predecessors, (1460), 690 states have return successors, (2110), 1421 states have call predecessors, (2110), 1457 states have call successors, (2110) [2022-11-19 07:16:31,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12357 states to 12357 states and 18752 transitions. [2022-11-19 07:16:31,093 INFO L78 Accepts]: Start accepts. Automaton has 12357 states and 18752 transitions. Word has length 109 [2022-11-19 07:16:31,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:31,096 INFO L495 AbstractCegarLoop]: Abstraction has 12357 states and 18752 transitions. [2022-11-19 07:16:31,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:16:31,097 INFO L276 IsEmpty]: Start isEmpty. Operand 12357 states and 18752 transitions. [2022-11-19 07:16:31,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 07:16:31,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:31,113 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:31,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-19 07:16:31,113 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:31,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:31,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1755810669, now seen corresponding path program 1 times [2022-11-19 07:16:31,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:31,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420005195] [2022-11-19 07:16:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:31,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:16:31,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:31,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420005195] [2022-11-19 07:16:31,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420005195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:31,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755683093] [2022-11-19 07:16:31,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:31,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:31,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:31,898 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:31,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:16:32,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:32,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-19 07:16:32,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:16:33,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:16:34,934 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:16:34,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755683093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:16:34,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1309497054] [2022-11-19 07:16:34,937 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-19 07:16:34,938 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:16:34,938 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:16:34,938 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:16:34,939 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:17:01,407 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 239 for LOIs [2022-11-19 07:17:01,487 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 240 for LOIs [2022-11-19 07:17:01,557 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 239 for LOIs [2022-11-19 07:17:01,638 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 239 for LOIs [2022-11-19 07:17:02,437 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 239 for LOIs [2022-11-19 07:17:02,880 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 120 for LOIs [2022-11-19 07:17:03,144 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 243 for LOIs [2022-11-19 07:17:03,223 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 239 for LOIs [2022-11-19 07:17:03,303 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:18:11,731 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '200600#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 2 ~E_5~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (<= 0 ~t4_pc~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:18:11,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:18:11,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:18:11,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 49 [2022-11-19 07:18:11,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072914184] [2022-11-19 07:18:11,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:18:11,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-19 07:18:11,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:18:11,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-19 07:18:11,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=9127, Unknown=0, NotChecked=0, Total=9900 [2022-11-19 07:18:11,734 INFO L87 Difference]: Start difference. First operand 12357 states and 18752 transitions. Second operand has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-19 07:18:21,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:18:21,683 INFO L93 Difference]: Finished difference Result 15206 states and 22094 transitions. [2022-11-19 07:18:21,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-19 07:18:21,684 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) Word has length 124 [2022-11-19 07:18:21,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:18:21,736 INFO L225 Difference]: With dead ends: 15206 [2022-11-19 07:18:21,736 INFO L226 Difference]: Without dead ends: 14135 [2022-11-19 07:18:21,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 315 SyntacticMatches, 7 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14312 ImplicationChecksByTransitivity, 73.5s TimeCoverageRelationStatistics Valid=3540, Invalid=29766, Unknown=0, NotChecked=0, Total=33306 [2022-11-19 07:18:21,749 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 4657 mSDsluCounter, 2024 mSDsCounter, 0 mSdLazyCounter, 4714 mSolverCounterSat, 2485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4658 SdHoareTripleChecker+Valid, 2229 SdHoareTripleChecker+Invalid, 7199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2485 IncrementalHoareTripleChecker+Valid, 4714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:18:21,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4658 Valid, 2229 Invalid, 7199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2485 Valid, 4714 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-19 07:18:21,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14135 states. [2022-11-19 07:18:23,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14135 to 12894. [2022-11-19 07:18:23,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12894 states, 10591 states have (on average 1.4758757435558494) internal successors, (15631), 10654 states have internal predecessors, (15631), 1534 states have call successors, (1534), 728 states have call predecessors, (1534), 767 states have return successors, (2202), 1513 states have call predecessors, (2202), 1531 states have call successors, (2202) [2022-11-19 07:18:23,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12894 states to 12894 states and 19367 transitions. [2022-11-19 07:18:23,637 INFO L78 Accepts]: Start accepts. Automaton has 12894 states and 19367 transitions. Word has length 124 [2022-11-19 07:18:23,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:18:23,638 INFO L495 AbstractCegarLoop]: Abstraction has 12894 states and 19367 transitions. [2022-11-19 07:18:23,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-19 07:18:23,638 INFO L276 IsEmpty]: Start isEmpty. Operand 12894 states and 19367 transitions. [2022-11-19 07:18:23,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 07:18:23,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:18:23,653 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:18:23,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:18:23,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-19 07:18:23,860 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:18:23,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:18:23,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1032292256, now seen corresponding path program 1 times [2022-11-19 07:18:23,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:18:23,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046860383] [2022-11-19 07:18:23,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:23,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:18:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 07:18:24,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:18:24,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046860383] [2022-11-19 07:18:24,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046860383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:18:24,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261607308] [2022-11-19 07:18:24,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:24,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:18:24,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:18:24,113 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:18:24,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:18:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:24,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:18:24,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:18:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:18:24,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:18:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 07:18:24,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261607308] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:18:24,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:18:24,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-19 07:18:24,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355813904] [2022-11-19 07:18:24,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:18:24,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:18:24,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:18:24,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:18:24,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:18:24,602 INFO L87 Difference]: Start difference. First operand 12894 states and 19367 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:18:26,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:18:26,979 INFO L93 Difference]: Finished difference Result 13853 states and 20458 transitions. [2022-11-19 07:18:26,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:18:26,979 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-19 07:18:26,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:18:27,014 INFO L225 Difference]: With dead ends: 13853 [2022-11-19 07:18:27,014 INFO L226 Difference]: Without dead ends: 12245 [2022-11-19 07:18:27,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-19 07:18:27,021 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 664 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:18:27,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 505 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:18:27,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12245 states. [2022-11-19 07:18:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12245 to 11904. [2022-11-19 07:18:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11904 states, 9894 states have (on average 1.4967657165959167) internal successors, (14809), 9956 states have internal predecessors, (14809), 1384 states have call successors, (1384), 607 states have call predecessors, (1384), 624 states have return successors, (2019), 1342 states have call predecessors, (2019), 1381 states have call successors, (2019) [2022-11-19 07:18:28,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11904 states to 11904 states and 18212 transitions. [2022-11-19 07:18:28,881 INFO L78 Accepts]: Start accepts. Automaton has 11904 states and 18212 transitions. Word has length 125 [2022-11-19 07:18:28,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:18:28,882 INFO L495 AbstractCegarLoop]: Abstraction has 11904 states and 18212 transitions. [2022-11-19 07:18:28,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:18:28,882 INFO L276 IsEmpty]: Start isEmpty. Operand 11904 states and 18212 transitions. [2022-11-19 07:18:28,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-19 07:18:28,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:18:28,911 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, 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] [2022-11-19 07:18:28,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:18:29,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102c50ca-a5d4-4eff-9b8c-e762ca6f481e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-19 07:18:29,119 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:18:29,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:18:29,120 INFO L85 PathProgramCache]: Analyzing trace with hash -2100535398, now seen corresponding path program 1 times [2022-11-19 07:18:29,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:18:29,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946121796] [2022-11-19 07:18:29,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:29,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:18:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 07:18:29,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:18:29,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946121796] [2022-11-19 07:18:29,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946121796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:18:29,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:18:29,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:18:29,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516892471] [2022-11-19 07:18:29,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:18:29,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:18:29,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:18:29,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:18:29,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:18:29,208 INFO L87 Difference]: Start difference. First operand 11904 states and 18212 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:18:32,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:18:32,219 INFO L93 Difference]: Finished difference Result 33929 states and 53565 transitions. [2022-11-19 07:18:32,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:18:32,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-11-19 07:18:32,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:18:32,290 INFO L225 Difference]: With dead ends: 33929 [2022-11-19 07:18:32,290 INFO L226 Difference]: Without dead ends: 22740 [2022-11-19 07:18:32,321 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 [2022-11-19 07:18:32,321 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 272 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:18:32,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 447 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:18:32,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22740 states. [2022-11-19 07:18:35,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22740 to 22624. [2022-11-19 07:18:35,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22624 states, 18918 states have (on average 1.4966169785389576) internal successors, (28313), 19028 states have internal predecessors, (28313), 2568 states have call successors, (2568), 1119 states have call predecessors, (2568), 1136 states have return successors, (3747), 2478 states have call predecessors, (3747), 2565 states have call successors, (3747) [2022-11-19 07:18:35,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22624 states to 22624 states and 34628 transitions. [2022-11-19 07:18:35,963 INFO L78 Accepts]: Start accepts. Automaton has 22624 states and 34628 transitions. Word has length 147 [2022-11-19 07:18:35,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:18:35,964 INFO L495 AbstractCegarLoop]: Abstraction has 22624 states and 34628 transitions. [2022-11-19 07:18:35,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:18:35,964 INFO L276 IsEmpty]: Start isEmpty. Operand 22624 states and 34628 transitions. [2022-11-19 07:18:36,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-19 07:18:36,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:18:36,004 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, 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] [2022-11-19 07:18:36,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-19 07:18:36,005 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:18:36,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:18:36,005 INFO L85 PathProgramCache]: Analyzing trace with hash -558126527, now seen corresponding path program 1 times [2022-11-19 07:18:36,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:18:36,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787148939] [2022-11-19 07:18:36,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:36,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:18:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 07:18:36,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:18:36,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787148939] [2022-11-19 07:18:36,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787148939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:18:36,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:18:36,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:18:36,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763328832] [2022-11-19 07:18:36,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:18:36,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:18:36,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:18:36,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:18:36,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:18:36,085 INFO L87 Difference]: Start difference. First operand 22624 states and 34628 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:18:42,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:18:42,720 INFO L93 Difference]: Finished difference Result 65737 states and 103197 transitions. [2022-11-19 07:18:42,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:18:42,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-11-19 07:18:42,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:18:42,853 INFO L225 Difference]: With dead ends: 65737 [2022-11-19 07:18:42,853 INFO L226 Difference]: Without dead ends: 43828 [2022-11-19 07:18:42,907 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 [2022-11-19 07:18:42,907 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 274 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:18:42,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 447 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:18:42,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43828 states.