./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6d6da8f3ee43e0b2f144002fad1e1be3bc4062b8e0f7b0d6768d1ce0f0c5101f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:11:37,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:11:37,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:11:37,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:11:37,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:11:37,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:11:37,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:11:37,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:11:37,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:11:37,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:11:37,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:11:37,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:11:37,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:11:37,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:11:37,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:11:37,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:11:37,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:11:37,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:11:37,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:11:37,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:11:37,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:11:37,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:11:37,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:11:37,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:11:37,879 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:11:37,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:11:37,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:11:37,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:11:37,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:11:37,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:11:37,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:11:37,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:11:37,883 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:11:37,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:11:37,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:11:37,885 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:11:37,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:11:37,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:11:37,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:11:37,886 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:11:37,887 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:11:37,887 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:11:37,904 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:11:37,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:11:37,905 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:11:37,905 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:11:37,905 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:11:37,905 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:11:37,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:11:37,906 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:11:37,919 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:11:37,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:11:37,919 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:11:37,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:11:37,919 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:11:37,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:11:37,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:11:37,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:11:37,920 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:11:37,920 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:11:37,920 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:11:37,920 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:11:37,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:11:37,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:11:37,921 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:11:37,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:11:37,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:11:37,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:11:37,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:11:37,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:11:37,921 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:11:37,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:11:37,922 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:11:37,922 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:11:37,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:11:37,922 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:11:37,922 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_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d6da8f3ee43e0b2f144002fad1e1be3bc4062b8e0f7b0d6768d1ce0f0c5101f [2021-12-06 19:11:38,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:11:38,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:11:38,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:11:38,107 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:11:38,107 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:11:38,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c [2021-12-06 19:11:38,158 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/data/8ede86bc4/ac5a8d9031164496a8865bf1df6dce87/FLAGe5f83095a [2021-12-06 19:11:38,577 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:11:38,577 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c [2021-12-06 19:11:38,595 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/data/8ede86bc4/ac5a8d9031164496a8865bf1df6dce87/FLAGe5f83095a [2021-12-06 19:11:38,607 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/data/8ede86bc4/ac5a8d9031164496a8865bf1df6dce87 [2021-12-06 19:11:38,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:11:38,610 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:11:38,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:11:38,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:11:38,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:11:38,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:11:38" (1/1) ... [2021-12-06 19:11:38,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a1a89e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:11:38, skipping insertion in model container [2021-12-06 19:11:38,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:11:38" (1/1) ... [2021-12-06 19:11:38,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:11:38,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:11:38,792 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[914,927] [2021-12-06 19:11:38,840 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[7115,7128] [2021-12-06 19:11:38,920 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:11:38,930 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:11:38,941 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[914,927] [2021-12-06 19:11:38,953 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[7115,7128] [2021-12-06 19:11:38,985 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:11:39,003 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:11:39,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:11:39 WrapperNode [2021-12-06 19:11:39,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:11:39,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:11:39,004 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:11:39,004 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:11:39,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:11:39" (1/1) ... [2021-12-06 19:11:39,024 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:11:39" (1/1) ... [2021-12-06 19:11:39,058 INFO L137 Inliner]: procedures = 73, calls = 88, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 929 [2021-12-06 19:11:39,058 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:11:39,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:11:39,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:11:39,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:11:39,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:11:39" (1/1) ... [2021-12-06 19:11:39,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:11:39" (1/1) ... [2021-12-06 19:11:39,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:11:39" (1/1) ... [2021-12-06 19:11:39,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:11:39" (1/1) ... [2021-12-06 19:11:39,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:11:39" (1/1) ... [2021-12-06 19:11:39,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:11:39" (1/1) ... [2021-12-06 19:11:39,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:11:39" (1/1) ... [2021-12-06 19:11:39,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:11:39,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:11:39,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:11:39,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:11:39,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:11:39" (1/1) ... [2021-12-06 19:11:39,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:11:39,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:11:39,143 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:11:39,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:11:39,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:11:39,173 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-06 19:11:39,173 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-06 19:11:39,173 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-06 19:11:39,173 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-06 19:11:39,173 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-06 19:11:39,173 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-06 19:11:39,173 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-06 19:11:39,174 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-06 19:11:39,174 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-06 19:11:39,174 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-06 19:11:39,174 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-06 19:11:39,174 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-06 19:11:39,174 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-06 19:11:39,174 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-06 19:11:39,174 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-06 19:11:39,174 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-06 19:11:39,174 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-06 19:11:39,174 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-06 19:11:39,174 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-06 19:11:39,174 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-06 19:11:39,175 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-06 19:11:39,175 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-06 19:11:39,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:11:39,175 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-06 19:11:39,175 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-06 19:11:39,175 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-06 19:11:39,175 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-06 19:11:39,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:11:39,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:11:39,175 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-06 19:11:39,175 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-06 19:11:39,175 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-06 19:11:39,175 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-06 19:11:39,264 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:11:39,266 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:11:39,785 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:11:39,797 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:11:39,797 INFO L301 CfgBuilder]: Removed 17 assume(true) statements. [2021-12-06 19:11:39,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:11:39 BoogieIcfgContainer [2021-12-06 19:11:39,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:11:39,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:11:39,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:11:39,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:11:39,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:11:38" (1/3) ... [2021-12-06 19:11:39,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@682ab5e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:11:39, skipping insertion in model container [2021-12-06 19:11:39,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:11:39" (2/3) ... [2021-12-06 19:11:39,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@682ab5e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:11:39, skipping insertion in model container [2021-12-06 19:11:39,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:11:39" (3/3) ... [2021-12-06 19:11:39,808 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.10.cil-1.c [2021-12-06 19:11:39,813 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:11:39,813 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 19:11:39,855 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:11:39,859 INFO L339 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=PETRI_NET, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 19:11:39,860 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 19:11:39,881 INFO L276 IsEmpty]: Start isEmpty. Operand has 441 states, 383 states have (on average 1.6370757180156659) internal successors, (627), 391 states have internal predecessors, (627), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2021-12-06 19:11:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 19:11:39,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:11:39,890 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:11:39,890 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:11:39,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:39,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1192357691, now seen corresponding path program 1 times [2021-12-06 19:11:39,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:39,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622173143] [2021-12-06 19:11:39,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:39,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:40,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:11:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:40,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:11:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:40,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 19:11:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:40,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:11:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:40,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:11:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:40,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:11:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:40,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:11:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:11:40,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:11:40,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622173143] [2021-12-06 19:11:40,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622173143] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:11:40,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:11:40,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 19:11:40,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216313525] [2021-12-06 19:11:40,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:11:40,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:11:40,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:11:40,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:11:40,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:11:40,205 INFO L87 Difference]: Start difference. First operand has 441 states, 383 states have (on average 1.6370757180156659) internal successors, (627), 391 states have internal predecessors, (627), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 19:11:40,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:11:40,989 INFO L93 Difference]: Finished difference Result 990 states and 1576 transitions. [2021-12-06 19:11:40,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 19:11:40,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-06 19:11:40,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:11:41,005 INFO L225 Difference]: With dead ends: 990 [2021-12-06 19:11:41,005 INFO L226 Difference]: Without dead ends: 565 [2021-12-06 19:11:41,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:11:41,013 INFO L933 BasicCegarLoop]: 686 mSDtfsCounter, 1083 mSDsluCounter, 1665 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1088 SdHoareTripleChecker+Valid, 2351 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:11:41,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1088 Valid, 2351 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 19:11:41,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-12-06 19:11:41,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 526. [2021-12-06 19:11:41,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 451 states have (on average 1.5210643015521064) internal successors, (686), 458 states have internal predecessors, (686), 51 states have call successors, (51), 22 states have call predecessors, (51), 22 states have return successors, (52), 48 states have call predecessors, (52), 47 states have call successors, (52) [2021-12-06 19:11:41,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 789 transitions. [2021-12-06 19:11:41,090 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 789 transitions. Word has length 65 [2021-12-06 19:11:41,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:11:41,090 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 789 transitions. [2021-12-06 19:11:41,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 19:11:41,090 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 789 transitions. [2021-12-06 19:11:41,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 19:11:41,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:11:41,094 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:11:41,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:11:41,095 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:11:41,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:41,095 INFO L85 PathProgramCache]: Analyzing trace with hash -929120350, now seen corresponding path program 1 times [2021-12-06 19:11:41,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:41,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002674842] [2021-12-06 19:11:41,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:41,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:41,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:11:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:41,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:11:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:41,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 19:11:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:41,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:11:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:41,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:11:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:41,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:11:41,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:41,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:11:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:11:41,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:11:41,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002674842] [2021-12-06 19:11:41,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002674842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:11:41,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:11:41,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 19:11:41,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151194396] [2021-12-06 19:11:41,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:11:41,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:11:41,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:11:41,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:11:41,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:11:41,198 INFO L87 Difference]: Start difference. First operand 526 states and 789 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 19:11:41,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:11:41,910 INFO L93 Difference]: Finished difference Result 873 states and 1266 transitions. [2021-12-06 19:11:41,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 19:11:41,910 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-06 19:11:41,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:11:41,915 INFO L225 Difference]: With dead ends: 873 [2021-12-06 19:11:41,915 INFO L226 Difference]: Without dead ends: 696 [2021-12-06 19:11:41,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:11:41,918 INFO L933 BasicCegarLoop]: 711 mSDtfsCounter, 1620 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1648 SdHoareTripleChecker+Valid, 2185 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:11:41,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1648 Valid, 2185 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 19:11:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-12-06 19:11:41,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 622. [2021-12-06 19:11:41,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 527 states have (on average 1.4990512333965844) internal successors, (790), 536 states have internal predecessors, (790), 62 states have call successors, (62), 29 states have call predecessors, (62), 31 states have return successors, (71), 60 states have call predecessors, (71), 58 states have call successors, (71) [2021-12-06 19:11:41,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 923 transitions. [2021-12-06 19:11:41,968 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 923 transitions. Word has length 65 [2021-12-06 19:11:41,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:11:41,968 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 923 transitions. [2021-12-06 19:11:41,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 19:11:41,969 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 923 transitions. [2021-12-06 19:11:41,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 19:11:41,972 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:11:41,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:11:41,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:11:41,972 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:11:41,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:41,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1337260836, now seen corresponding path program 1 times [2021-12-06 19:11:41,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:41,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719824784] [2021-12-06 19:11:41,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:41,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:42,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:11:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:42,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:11:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:42,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 19:11:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:42,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:11:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:42,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:11:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:42,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:11:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:42,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:11:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:11:42,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:11:42,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719824784] [2021-12-06 19:11:42,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719824784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:11:42,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:11:42,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 19:11:42,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076398563] [2021-12-06 19:11:42,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:11:42,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:11:42,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:11:42,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:11:42,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:11:42,081 INFO L87 Difference]: Start difference. First operand 622 states and 923 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:11:42,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:11:42,694 INFO L93 Difference]: Finished difference Result 923 states and 1337 transitions. [2021-12-06 19:11:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 19:11:42,695 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-06 19:11:42,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:11:42,699 INFO L225 Difference]: With dead ends: 923 [2021-12-06 19:11:42,699 INFO L226 Difference]: Without dead ends: 656 [2021-12-06 19:11:42,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:11:42,701 INFO L933 BasicCegarLoop]: 645 mSDtfsCounter, 851 mSDsluCounter, 2108 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 2753 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:11:42,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [852 Valid, 2753 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:11:42,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-12-06 19:11:42,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 627. [2021-12-06 19:11:42,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 531 states have (on average 1.4915254237288136) internal successors, (792), 540 states have internal predecessors, (792), 62 states have call successors, (62), 29 states have call predecessors, (62), 32 states have return successors, (72), 61 states have call predecessors, (72), 58 states have call successors, (72) [2021-12-06 19:11:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 926 transitions. [2021-12-06 19:11:42,735 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 926 transitions. Word has length 65 [2021-12-06 19:11:42,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:11:42,735 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 926 transitions. [2021-12-06 19:11:42,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:11:42,736 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 926 transitions. [2021-12-06 19:11:42,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 19:11:42,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:11:42,739 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:11:42,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 19:11:42,739 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:11:42,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:42,740 INFO L85 PathProgramCache]: Analyzing trace with hash 307901538, now seen corresponding path program 1 times [2021-12-06 19:11:42,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:42,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463442359] [2021-12-06 19:11:42,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:42,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:42,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:11:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:42,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:11:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:42,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 19:11:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:42,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:11:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:42,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:11:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:42,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:11:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:42,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:11:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:11:42,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:11:42,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463442359] [2021-12-06 19:11:42,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463442359] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:11:42,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:11:42,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 19:11:42,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034328202] [2021-12-06 19:11:42,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:11:42,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:11:42,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:11:42,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:11:42,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:11:42,848 INFO L87 Difference]: Start difference. First operand 627 states and 926 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:11:43,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:11:43,392 INFO L93 Difference]: Finished difference Result 945 states and 1359 transitions. [2021-12-06 19:11:43,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 19:11:43,392 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-06 19:11:43,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:11:43,395 INFO L225 Difference]: With dead ends: 945 [2021-12-06 19:11:43,396 INFO L226 Difference]: Without dead ends: 673 [2021-12-06 19:11:43,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:11:43,397 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 852 mSDsluCounter, 2098 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 2740 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:11:43,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 2740 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:11:43,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-12-06 19:11:43,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 642. [2021-12-06 19:11:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 543 states have (on average 1.4806629834254144) internal successors, (804), 552 states have internal predecessors, (804), 62 states have call successors, (62), 29 states have call predecessors, (62), 35 states have return successors, (75), 64 states have call predecessors, (75), 58 states have call successors, (75) [2021-12-06 19:11:43,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 941 transitions. [2021-12-06 19:11:43,423 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 941 transitions. Word has length 65 [2021-12-06 19:11:43,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:11:43,423 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 941 transitions. [2021-12-06 19:11:43,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:11:43,423 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 941 transitions. [2021-12-06 19:11:43,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 19:11:43,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:11:43,425 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:11:43,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 19:11:43,425 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:11:43,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:43,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1694104932, now seen corresponding path program 1 times [2021-12-06 19:11:43,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:43,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010591353] [2021-12-06 19:11:43,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:43,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:43,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:11:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:43,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:11:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:43,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 19:11:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:43,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:11:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:43,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:11:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:43,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:11:43,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:43,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:11:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:11:43,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:11:43,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010591353] [2021-12-06 19:11:43,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010591353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:11:43,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:11:43,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 19:11:43,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762176413] [2021-12-06 19:11:43,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:11:43,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:11:43,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:11:43,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:11:43,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:11:43,516 INFO L87 Difference]: Start difference. First operand 642 states and 941 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 19:11:44,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:11:44,232 INFO L93 Difference]: Finished difference Result 1034 states and 1452 transitions. [2021-12-06 19:11:44,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 19:11:44,233 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-06 19:11:44,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:11:44,238 INFO L225 Difference]: With dead ends: 1034 [2021-12-06 19:11:44,238 INFO L226 Difference]: Without dead ends: 749 [2021-12-06 19:11:44,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:11:44,240 INFO L933 BasicCegarLoop]: 664 mSDtfsCounter, 1286 mSDsluCounter, 1629 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1315 SdHoareTripleChecker+Valid, 2293 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:11:44,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1315 Valid, 2293 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 19:11:44,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-12-06 19:11:44,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 654. [2021-12-06 19:11:44,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 553 states have (on average 1.4719710669077757) internal successors, (814), 562 states have internal predecessors, (814), 63 states have call successors, (63), 30 states have call predecessors, (63), 36 states have return successors, (74), 65 states have call predecessors, (74), 59 states have call successors, (74) [2021-12-06 19:11:44,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 951 transitions. [2021-12-06 19:11:44,268 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 951 transitions. Word has length 65 [2021-12-06 19:11:44,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:11:44,268 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 951 transitions. [2021-12-06 19:11:44,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 19:11:44,268 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 951 transitions. [2021-12-06 19:11:44,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 19:11:44,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:11:44,269 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:11:44,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 19:11:44,270 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:11:44,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:44,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1560091426, now seen corresponding path program 1 times [2021-12-06 19:11:44,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:44,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065432692] [2021-12-06 19:11:44,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:44,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:44,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:11:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:44,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:11:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:44,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 19:11:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:44,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:11:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:44,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:11:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:44,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:11:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:44,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:11:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:11:44,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:11:44,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065432692] [2021-12-06 19:11:44,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065432692] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:11:44,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:11:44,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:11:44,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169400150] [2021-12-06 19:11:44,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:11:44,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:11:44,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:11:44,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:11:44,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:11:44,346 INFO L87 Difference]: Start difference. First operand 654 states and 951 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 19:11:44,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:11:44,687 INFO L93 Difference]: Finished difference Result 1296 states and 1798 transitions. [2021-12-06 19:11:44,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 19:11:44,688 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-06 19:11:44,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:11:44,695 INFO L225 Difference]: With dead ends: 1296 [2021-12-06 19:11:44,695 INFO L226 Difference]: Without dead ends: 1000 [2021-12-06 19:11:44,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-06 19:11:44,698 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 1572 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1602 SdHoareTripleChecker+Valid, 1573 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:11:44,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1602 Valid, 1573 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:11:44,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-12-06 19:11:44,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 944. [2021-12-06 19:11:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 777 states have (on average 1.416988416988417) internal successors, (1101), 793 states have internal predecessors, (1101), 98 states have call successors, (98), 52 states have call predecessors, (98), 67 states have return successors, (131), 105 states have call predecessors, (131), 94 states have call successors, (131) [2021-12-06 19:11:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1330 transitions. [2021-12-06 19:11:44,752 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1330 transitions. Word has length 65 [2021-12-06 19:11:44,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:11:44,752 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 1330 transitions. [2021-12-06 19:11:44,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 19:11:44,753 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1330 transitions. [2021-12-06 19:11:44,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 19:11:44,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:11:44,755 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:11:44,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 19:11:44,756 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:11:44,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:44,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1800845042, now seen corresponding path program 1 times [2021-12-06 19:11:44,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:44,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765909204] [2021-12-06 19:11:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:44,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:44,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:11:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:44,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:11:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:44,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 19:11:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:44,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:11:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:44,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:11:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:44,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:11:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:44,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:11:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:11:44,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:11:44,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765909204] [2021-12-06 19:11:44,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765909204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:11:44,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:11:44,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:11:44,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769231247] [2021-12-06 19:11:44,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:11:44,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:11:44,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:11:44,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:11:44,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:11:44,823 INFO L87 Difference]: Start difference. First operand 944 states and 1330 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:11:45,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:11:45,275 INFO L93 Difference]: Finished difference Result 2147 states and 2901 transitions. [2021-12-06 19:11:45,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:11:45,276 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 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 66 [2021-12-06 19:11:45,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:11:45,283 INFO L225 Difference]: With dead ends: 2147 [2021-12-06 19:11:45,283 INFO L226 Difference]: Without dead ends: 1540 [2021-12-06 19:11:45,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:11:45,286 INFO L933 BasicCegarLoop]: 645 mSDtfsCounter, 752 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 1874 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:11:45,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 1874 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:11:45,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2021-12-06 19:11:45,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1425. [2021-12-06 19:11:45,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1156 states have (on average 1.3685121107266436) internal successors, (1582), 1175 states have internal predecessors, (1582), 143 states have call successors, (143), 96 states have call predecessors, (143), 124 states have return successors, (203), 160 states have call predecessors, (203), 139 states have call successors, (203) [2021-12-06 19:11:45,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 1928 transitions. [2021-12-06 19:11:45,338 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 1928 transitions. Word has length 66 [2021-12-06 19:11:45,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:11:45,338 INFO L470 AbstractCegarLoop]: Abstraction has 1425 states and 1928 transitions. [2021-12-06 19:11:45,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:11:45,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 1928 transitions. [2021-12-06 19:11:45,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 19:11:45,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:11:45,340 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:11:45,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 19:11:45,341 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:11:45,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:45,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1035882595, now seen corresponding path program 1 times [2021-12-06 19:11:45,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:45,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573744355] [2021-12-06 19:11:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:45,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:45,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:11:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:45,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:11:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:45,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 19:11:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:45,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:11:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:45,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:11:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:45,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:11:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:45,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:11:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:11:45,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:11:45,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573744355] [2021-12-06 19:11:45,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573744355] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:11:45,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:11:45,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:11:45,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553424906] [2021-12-06 19:11:45,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:11:45,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:11:45,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:11:45,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:11:45,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:11:45,402 INFO L87 Difference]: Start difference. First operand 1425 states and 1928 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:11:45,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:11:45,697 INFO L93 Difference]: Finished difference Result 3613 states and 4734 transitions. [2021-12-06 19:11:45,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 19:11:45,698 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 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 66 [2021-12-06 19:11:45,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:11:45,709 INFO L225 Difference]: With dead ends: 3613 [2021-12-06 19:11:45,710 INFO L226 Difference]: Without dead ends: 2545 [2021-12-06 19:11:45,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:11:45,713 INFO L933 BasicCegarLoop]: 646 mSDtfsCounter, 1573 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1604 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:11:45,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1604 Valid, 1290 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:11:45,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2021-12-06 19:11:45,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 2287. [2021-12-06 19:11:45,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 1822 states have (on average 1.3221734357848518) internal successors, (2409), 1851 states have internal predecessors, (2409), 241 states have call successors, (241), 180 states have call predecessors, (241), 222 states have return successors, (339), 262 states have call predecessors, (339), 237 states have call successors, (339) [2021-12-06 19:11:45,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 2989 transitions. [2021-12-06 19:11:45,806 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 2989 transitions. Word has length 66 [2021-12-06 19:11:45,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:11:45,806 INFO L470 AbstractCegarLoop]: Abstraction has 2287 states and 2989 transitions. [2021-12-06 19:11:45,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:11:45,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 2989 transitions. [2021-12-06 19:11:45,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 19:11:45,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:11:45,808 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:11:45,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 19:11:45,808 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:11:45,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:45,809 INFO L85 PathProgramCache]: Analyzing trace with hash 283948209, now seen corresponding path program 1 times [2021-12-06 19:11:45,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:45,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252206438] [2021-12-06 19:11:45,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:45,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:45,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:11:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:45,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:11:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:45,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 19:11:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:45,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:11:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:45,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:11:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:45,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:11:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:45,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:11:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:11:45,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:11:45,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252206438] [2021-12-06 19:11:45,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252206438] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:11:45,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:11:45,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:11:45,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152667421] [2021-12-06 19:11:45,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:11:45,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:11:45,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:11:45,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:11:45,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:11:45,862 INFO L87 Difference]: Start difference. First operand 2287 states and 2989 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:11:46,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:11:46,165 INFO L93 Difference]: Finished difference Result 5197 states and 6639 transitions. [2021-12-06 19:11:46,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:11:46,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 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 72 [2021-12-06 19:11:46,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:11:46,184 INFO L225 Difference]: With dead ends: 5197 [2021-12-06 19:11:46,184 INFO L226 Difference]: Without dead ends: 3267 [2021-12-06 19:11:46,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:11:46,190 INFO L933 BasicCegarLoop]: 660 mSDtfsCounter, 1554 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:11:46,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1585 Valid, 1326 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:11:46,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2021-12-06 19:11:46,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 3019. [2021-12-06 19:11:46,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 2390 states have (on average 1.302510460251046) internal successors, (3113), 2427 states have internal predecessors, (3113), 321 states have call successors, (321), 250 states have call predecessors, (321), 306 states have return successors, (448), 348 states have call predecessors, (448), 317 states have call successors, (448) [2021-12-06 19:11:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 3882 transitions. [2021-12-06 19:11:46,319 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 3882 transitions. Word has length 72 [2021-12-06 19:11:46,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:11:46,320 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 3882 transitions. [2021-12-06 19:11:46,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:11:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 3882 transitions. [2021-12-06 19:11:46,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 19:11:46,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:11:46,322 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:11:46,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 19:11:46,322 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:11:46,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:46,323 INFO L85 PathProgramCache]: Analyzing trace with hash -304350912, now seen corresponding path program 1 times [2021-12-06 19:11:46,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:46,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096748270] [2021-12-06 19:11:46,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:46,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:46,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:11:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:46,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:11:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:46,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 19:11:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:46,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:11:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:46,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:11:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:46,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:11:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:46,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:11:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:11:46,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:11:46,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096748270] [2021-12-06 19:11:46,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096748270] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:11:46,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:11:46,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:11:46,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599532150] [2021-12-06 19:11:46,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:11:46,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:11:46,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:11:46,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:11:46,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:11:46,387 INFO L87 Difference]: Start difference. First operand 3019 states and 3882 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 19:11:46,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:11:46,736 INFO L93 Difference]: Finished difference Result 3793 states and 4813 transitions. [2021-12-06 19:11:46,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 19:11:46,737 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 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 73 [2021-12-06 19:11:46,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:11:46,751 INFO L225 Difference]: With dead ends: 3793 [2021-12-06 19:11:46,751 INFO L226 Difference]: Without dead ends: 3790 [2021-12-06 19:11:46,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-06 19:11:46,752 INFO L933 BasicCegarLoop]: 655 mSDtfsCounter, 1877 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1887 SdHoareTripleChecker+Valid, 1602 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:11:46,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1887 Valid, 1602 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:11:46,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2021-12-06 19:11:46,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 3513. [2021-12-06 19:11:46,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 2775 states have (on average 1.2918918918918918) internal successors, (3585), 2817 states have internal predecessors, (3585), 371 states have call successors, (371), 294 states have call predecessors, (371), 365 states have return successors, (527), 408 states have call predecessors, (527), 368 states have call successors, (527) [2021-12-06 19:11:46,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 4483 transitions. [2021-12-06 19:11:46,874 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 4483 transitions. Word has length 73 [2021-12-06 19:11:46,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:11:46,874 INFO L470 AbstractCegarLoop]: Abstraction has 3513 states and 4483 transitions. [2021-12-06 19:11:46,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 19:11:46,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 4483 transitions. [2021-12-06 19:11:46,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 19:11:46,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:11:46,876 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:11:46,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 19:11:46,876 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:11:46,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:46,877 INFO L85 PathProgramCache]: Analyzing trace with hash -846258469, now seen corresponding path program 1 times [2021-12-06 19:11:46,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:46,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169661147] [2021-12-06 19:11:46,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:46,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:46,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:11:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:46,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:11:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:46,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 19:11:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:46,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:11:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:46,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:11:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:46,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:11:46,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:46,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:11:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:11:46,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:11:46,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169661147] [2021-12-06 19:11:46,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169661147] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:11:46,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582448330] [2021-12-06 19:11:46,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:46,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:11:46,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:11:46,972 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:11:46,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:11:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:47,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 19:11:47,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:11:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:11:47,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:11:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:11:47,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582448330] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:11:47,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:11:47,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-06 19:11:47,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899444468] [2021-12-06 19:11:47,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:11:47,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 19:11:47,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:11:47,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 19:11:47,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:11:47,495 INFO L87 Difference]: Start difference. First operand 3513 states and 4483 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-06 19:11:48,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:11:48,647 INFO L93 Difference]: Finished difference Result 7954 states and 9969 transitions. [2021-12-06 19:11:48,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 19:11:48,648 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 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 74 [2021-12-06 19:11:48,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:11:48,681 INFO L225 Difference]: With dead ends: 7954 [2021-12-06 19:11:48,681 INFO L226 Difference]: Without dead ends: 7951 [2021-12-06 19:11:48,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-12-06 19:11:48,684 INFO L933 BasicCegarLoop]: 815 mSDtfsCounter, 1783 mSDsluCounter, 2229 mSDsCounter, 0 mSdLazyCounter, 2017 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1853 SdHoareTripleChecker+Valid, 3044 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 2017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:11:48,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1853 Valid, 3044 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 2017 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 19:11:48,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2021-12-06 19:11:48,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 5303. [2021-12-06 19:11:48,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5303 states, 4179 states have (on average 1.2828427853553481) internal successors, (5361), 4243 states have internal predecessors, (5361), 555 states have call successors, (555), 452 states have call predecessors, (555), 567 states have return successors, (805), 614 states have call predecessors, (805), 552 states have call successors, (805) [2021-12-06 19:11:48,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5303 states to 5303 states and 6721 transitions. [2021-12-06 19:11:48,933 INFO L78 Accepts]: Start accepts. Automaton has 5303 states and 6721 transitions. Word has length 74 [2021-12-06 19:11:48,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:11:48,934 INFO L470 AbstractCegarLoop]: Abstraction has 5303 states and 6721 transitions. [2021-12-06 19:11:48,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-06 19:11:48,934 INFO L276 IsEmpty]: Start isEmpty. Operand 5303 states and 6721 transitions. [2021-12-06 19:11:48,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 19:11:48,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:11:48,936 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:11:48,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:11:49,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 19:11:49,137 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:11:49,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:49,137 INFO L85 PathProgramCache]: Analyzing trace with hash -931904896, now seen corresponding path program 2 times [2021-12-06 19:11:49,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:49,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925818721] [2021-12-06 19:11:49,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:49,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:49,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:11:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:49,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:11:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:49,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 19:11:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:49,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:11:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:49,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:11:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:49,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:11:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:49,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:11:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:49,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:11:49,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:11:49,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925818721] [2021-12-06 19:11:49,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925818721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:11:49,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:11:49,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:11:49,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573794091] [2021-12-06 19:11:49,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:11:49,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:11:49,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:11:49,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:11:49,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:11:49,190 INFO L87 Difference]: Start difference. First operand 5303 states and 6721 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 19:11:49,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:11:49,596 INFO L93 Difference]: Finished difference Result 7985 states and 10094 transitions. [2021-12-06 19:11:49,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:11:49,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 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 77 [2021-12-06 19:11:49,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:11:49,618 INFO L225 Difference]: With dead ends: 7985 [2021-12-06 19:11:49,618 INFO L226 Difference]: Without dead ends: 3910 [2021-12-06 19:11:49,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:11:49,628 INFO L933 BasicCegarLoop]: 706 mSDtfsCounter, 1160 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1194 SdHoareTripleChecker+Valid, 1745 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:11:49,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1194 Valid, 1745 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:11:49,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3910 states. [2021-12-06 19:11:49,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3910 to 3675. [2021-12-06 19:11:49,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3675 states, 2907 states have (on average 1.2731338149294806) internal successors, (3701), 2949 states have internal predecessors, (3701), 387 states have call successors, (387), 308 states have call predecessors, (387), 379 states have return successors, (531), 424 states have call predecessors, (531), 384 states have call successors, (531) [2021-12-06 19:11:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3675 states to 3675 states and 4619 transitions. [2021-12-06 19:11:49,780 INFO L78 Accepts]: Start accepts. Automaton has 3675 states and 4619 transitions. Word has length 77 [2021-12-06 19:11:49,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:11:49,780 INFO L470 AbstractCegarLoop]: Abstraction has 3675 states and 4619 transitions. [2021-12-06 19:11:49,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 19:11:49,780 INFO L276 IsEmpty]: Start isEmpty. Operand 3675 states and 4619 transitions. [2021-12-06 19:11:49,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 19:11:49,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:11:49,783 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:11:49,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 19:11:49,783 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:11:49,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:49,783 INFO L85 PathProgramCache]: Analyzing trace with hash -840062387, now seen corresponding path program 1 times [2021-12-06 19:11:49,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:49,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508044744] [2021-12-06 19:11:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:49,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:49,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:49,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:11:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:49,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:11:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:49,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 19:11:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:49,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:11:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:49,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:11:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:49,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:11:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:49,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:11:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:49,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 19:11:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 19:11:49,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:11:49,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508044744] [2021-12-06 19:11:49,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508044744] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:11:49,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:11:49,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 19:11:49,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005047563] [2021-12-06 19:11:49,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:11:49,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:11:49,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:11:49,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:11:49,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:11:49,846 INFO L87 Difference]: Start difference. First operand 3675 states and 4619 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 19:11:50,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:11:50,860 INFO L93 Difference]: Finished difference Result 10547 states and 13036 transitions. [2021-12-06 19:11:50,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 19:11:50,860 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2021-12-06 19:11:50,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:11:50,879 INFO L225 Difference]: With dead ends: 10547 [2021-12-06 19:11:50,880 INFO L226 Difference]: Without dead ends: 5910 [2021-12-06 19:11:50,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-06 19:11:50,888 INFO L933 BasicCegarLoop]: 710 mSDtfsCounter, 980 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 2349 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:11:50,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [996 Valid, 2349 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1209 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 19:11:50,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5910 states. [2021-12-06 19:11:51,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5910 to 5590. [2021-12-06 19:11:51,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5590 states, 4365 states have (on average 1.2426116838487973) internal successors, (5424), 4450 states have internal predecessors, (5424), 591 states have call successors, (591), 482 states have call predecessors, (591), 632 states have return successors, (913), 664 states have call predecessors, (913), 588 states have call successors, (913) [2021-12-06 19:11:51,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5590 states to 5590 states and 6928 transitions. [2021-12-06 19:11:51,108 INFO L78 Accepts]: Start accepts. Automaton has 5590 states and 6928 transitions. Word has length 84 [2021-12-06 19:11:51,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:11:51,108 INFO L470 AbstractCegarLoop]: Abstraction has 5590 states and 6928 transitions. [2021-12-06 19:11:51,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 19:11:51,109 INFO L276 IsEmpty]: Start isEmpty. Operand 5590 states and 6928 transitions. [2021-12-06 19:11:51,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 19:11:51,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:11:51,113 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:11:51,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 19:11:51,113 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:11:51,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:51,113 INFO L85 PathProgramCache]: Analyzing trace with hash 670528542, now seen corresponding path program 1 times [2021-12-06 19:11:51,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:51,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314585563] [2021-12-06 19:11:51,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:51,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:51,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:11:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:51,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:11:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:51,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 19:11:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:51,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:11:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:51,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:11:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:51,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:11:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:51,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:11:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:51,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 19:11:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:11:51,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:11:51,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314585563] [2021-12-06 19:11:51,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314585563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:11:51,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:11:51,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 19:11:51,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176020288] [2021-12-06 19:11:51,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:11:51,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:11:51,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:11:51,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:11:51,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:11:51,189 INFO L87 Difference]: Start difference. First operand 5590 states and 6928 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 19:11:52,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:11:52,114 INFO L93 Difference]: Finished difference Result 9593 states and 11768 transitions. [2021-12-06 19:11:52,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 19:11:52,114 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 93 [2021-12-06 19:11:52,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:11:52,127 INFO L225 Difference]: With dead ends: 9593 [2021-12-06 19:11:52,127 INFO L226 Difference]: Without dead ends: 5000 [2021-12-06 19:11:52,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-06 19:11:52,133 INFO L933 BasicCegarLoop]: 700 mSDtfsCounter, 2198 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2242 SdHoareTripleChecker+Valid, 2062 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:11:52,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2242 Valid, 2062 Invalid, 1720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 19:11:52,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5000 states. [2021-12-06 19:11:52,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5000 to 4666. [2021-12-06 19:11:52,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4666 states, 3654 states have (on average 1.2378215654077722) internal successors, (4523), 3721 states have internal predecessors, (4523), 492 states have call successors, (492), 397 states have call predecessors, (492), 518 states have return successors, (691), 554 states have call predecessors, (691), 489 states have call successors, (691) [2021-12-06 19:11:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4666 states to 4666 states and 5706 transitions. [2021-12-06 19:11:52,311 INFO L78 Accepts]: Start accepts. Automaton has 4666 states and 5706 transitions. Word has length 93 [2021-12-06 19:11:52,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:11:52,312 INFO L470 AbstractCegarLoop]: Abstraction has 4666 states and 5706 transitions. [2021-12-06 19:11:52,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 19:11:52,312 INFO L276 IsEmpty]: Start isEmpty. Operand 4666 states and 5706 transitions. [2021-12-06 19:11:52,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-06 19:11:52,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:11:52,318 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 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] [2021-12-06 19:11:52,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 19:11:52,318 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:11:52,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:52,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1155770855, now seen corresponding path program 1 times [2021-12-06 19:11:52,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:52,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997482820] [2021-12-06 19:11:52,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:52,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:52,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:11:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:52,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:11:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:52,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 19:11:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:52,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:11:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:52,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:11:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:52,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:11:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:52,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:11:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:52,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 19:11:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:52,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 19:11:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:52,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 19:11:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:52,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 19:11:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:52,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:11:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:52,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:11:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:52,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 19:11:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:52,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 19:11:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:52,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-06 19:11:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-06 19:11:52,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:11:52,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997482820] [2021-12-06 19:11:52,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997482820] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:11:52,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907549014] [2021-12-06 19:11:52,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:52,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:11:52,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:11:52,417 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:11:52,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:11:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:52,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:11:52,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:11:52,622 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:11:52,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:11:52,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907549014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:11:52,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:11:52,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-06 19:11:52,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119493692] [2021-12-06 19:11:52,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:11:52,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:11:52,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:11:52,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:11:52,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:11:52,625 INFO L87 Difference]: Start difference. First operand 4666 states and 5706 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-06 19:11:52,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:11:52,768 INFO L93 Difference]: Finished difference Result 6832 states and 8329 transitions. [2021-12-06 19:11:52,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:11:52,768 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2021-12-06 19:11:52,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:11:52,777 INFO L225 Difference]: With dead ends: 6832 [2021-12-06 19:11:52,777 INFO L226 Difference]: Without dead ends: 2527 [2021-12-06 19:11:52,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:11:52,783 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 34 mSDsluCounter, 2579 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3233 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:11:52,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3233 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:11:52,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2021-12-06 19:11:52,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 2402. [2021-12-06 19:11:52,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 1967 states have (on average 1.2552109811896288) internal successors, (2469), 1983 states have internal predecessors, (2469), 216 states have call successors, (216), 163 states have call predecessors, (216), 217 states have return successors, (298), 256 states have call predecessors, (298), 213 states have call successors, (298) [2021-12-06 19:11:52,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 2983 transitions. [2021-12-06 19:11:52,897 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 2983 transitions. Word has length 145 [2021-12-06 19:11:52,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:11:52,897 INFO L470 AbstractCegarLoop]: Abstraction has 2402 states and 2983 transitions. [2021-12-06 19:11:52,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-06 19:11:52,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 2983 transitions. [2021-12-06 19:11:52,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-06 19:11:52,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:11:52,901 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:11:52,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 19:11:53,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 19:11:53,103 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:11:53,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:53,104 INFO L85 PathProgramCache]: Analyzing trace with hash -707927933, now seen corresponding path program 1 times [2021-12-06 19:11:53,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:53,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686171875] [2021-12-06 19:11:53,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:53,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:11:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:11:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 19:11:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:11:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:11:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:11:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:11:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 19:11:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 19:11:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 19:11:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 19:11:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:11:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:11:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-06 19:11:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-06 19:11:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-06 19:11:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-06 19:11:53,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:11:53,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686171875] [2021-12-06 19:11:53,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686171875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:11:53,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:11:53,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:11:53,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797518648] [2021-12-06 19:11:53,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:11:53,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:11:53,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:11:53,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:11:53,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:11:53,288 INFO L87 Difference]: Start difference. First operand 2402 states and 2983 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 19:11:53,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:11:53,646 INFO L93 Difference]: Finished difference Result 2467 states and 3051 transitions. [2021-12-06 19:11:53,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:11:53,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 147 [2021-12-06 19:11:53,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:11:53,652 INFO L225 Difference]: With dead ends: 2467 [2021-12-06 19:11:53,652 INFO L226 Difference]: Without dead ends: 2024 [2021-12-06 19:11:53,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:11:53,654 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 673 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:11:53,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 1802 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:11:53,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2021-12-06 19:11:53,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1962. [2021-12-06 19:11:53,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1623 states have (on average 1.2723351817621689) internal successors, (2065), 1636 states have internal predecessors, (2065), 170 states have call successors, (170), 123 states have call predecessors, (170), 167 states have return successors, (234), 203 states have call predecessors, (234), 167 states have call successors, (234) [2021-12-06 19:11:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2469 transitions. [2021-12-06 19:11:53,735 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2469 transitions. Word has length 147 [2021-12-06 19:11:53,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:11:53,735 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 2469 transitions. [2021-12-06 19:11:53,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 19:11:53,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2469 transitions. [2021-12-06 19:11:53,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-06 19:11:53,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:11:53,739 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:11:53,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 19:11:53,739 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:11:53,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:53,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1913489485, now seen corresponding path program 1 times [2021-12-06 19:11:53,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:53,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358287265] [2021-12-06 19:11:53,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:53,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:11:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:11:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 19:11:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:11:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:11:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:11:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:11:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 19:11:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 19:11:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 19:11:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 19:11:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:11:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:11:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 19:11:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 19:11:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-06 19:11:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-06 19:11:53,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:11:53,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358287265] [2021-12-06 19:11:53,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358287265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:11:53,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:11:53,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:11:53,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138670327] [2021-12-06 19:11:53,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:11:53,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:11:53,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:11:53,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:11:53,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:11:53,814 INFO L87 Difference]: Start difference. First operand 1962 states and 2469 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-06 19:11:54,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:11:54,294 INFO L93 Difference]: Finished difference Result 3439 states and 4268 transitions. [2021-12-06 19:11:54,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:11:54,294 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 159 [2021-12-06 19:11:54,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:11:54,299 INFO L225 Difference]: With dead ends: 3439 [2021-12-06 19:11:54,299 INFO L226 Difference]: Without dead ends: 2063 [2021-12-06 19:11:54,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:11:54,302 INFO L933 BasicCegarLoop]: 667 mSDtfsCounter, 600 mSDsluCounter, 1642 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 2309 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:11:54,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [601 Valid, 2309 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:11:54,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-12-06 19:11:54,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1871. [2021-12-06 19:11:54,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1554 states have (on average 1.274131274131274) internal successors, (1980), 1568 states have internal predecessors, (1980), 161 states have call successors, (161), 118 states have call predecessors, (161), 154 states have return successors, (218), 185 states have call predecessors, (218), 158 states have call successors, (218) [2021-12-06 19:11:54,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2359 transitions. [2021-12-06 19:11:54,365 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2359 transitions. Word has length 159 [2021-12-06 19:11:54,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:11:54,365 INFO L470 AbstractCegarLoop]: Abstraction has 1871 states and 2359 transitions. [2021-12-06 19:11:54,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-06 19:11:54,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2359 transitions. [2021-12-06 19:11:54,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-06 19:11:54,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:11:54,368 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:11:54,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 19:11:54,368 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:11:54,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:54,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1858661205, now seen corresponding path program 1 times [2021-12-06 19:11:54,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:54,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560320403] [2021-12-06 19:11:54,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:54,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:54,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:11:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:54,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 19:11:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:54,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 19:11:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:54,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:11:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:54,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:11:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:54,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:11:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:54,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:11:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:54,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 19:11:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:54,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 19:11:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:54,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 19:11:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:54,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 19:11:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:54,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:11:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:54,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 19:11:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:54,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 19:11:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:54,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-06 19:11:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:54,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 19:11:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 19:11:54,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:11:54,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560320403] [2021-12-06 19:11:54,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560320403] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:11:54,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623082986] [2021-12-06 19:11:54,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:54,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:11:54,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:11:54,466 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:11:54,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:11:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:54,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 19:11:54,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:11:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 19:11:54,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:11:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-06 19:11:54,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623082986] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:11:54,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:11:54,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2021-12-06 19:11:54,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473089283] [2021-12-06 19:11:54,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:11:54,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 19:11:54,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:11:54,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 19:11:54,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:11:54,912 INFO L87 Difference]: Start difference. First operand 1871 states and 2359 transitions. Second operand has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-12-06 19:11:55,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:11:55,630 INFO L93 Difference]: Finished difference Result 3843 states and 4812 transitions. [2021-12-06 19:11:55,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 19:11:55,630 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 162 [2021-12-06 19:11:55,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:11:55,636 INFO L225 Difference]: With dead ends: 3843 [2021-12-06 19:11:55,636 INFO L226 Difference]: Without dead ends: 2411 [2021-12-06 19:11:55,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2021-12-06 19:11:55,639 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 2108 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2140 SdHoareTripleChecker+Valid, 1867 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:11:55,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2140 Valid, 1867 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:11:55,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-12-06 19:11:55,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2261. [2021-12-06 19:11:55,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2261 states, 1832 states have (on average 1.2461790393013101) internal successors, (2283), 1854 states have internal predecessors, (2283), 215 states have call successors, (215), 168 states have call predecessors, (215), 212 states have return successors, (332), 239 states have call predecessors, (332), 212 states have call successors, (332) [2021-12-06 19:11:55,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 2830 transitions. [2021-12-06 19:11:55,728 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 2830 transitions. Word has length 162 [2021-12-06 19:11:55,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:11:55,729 INFO L470 AbstractCegarLoop]: Abstraction has 2261 states and 2830 transitions. [2021-12-06 19:11:55,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-12-06 19:11:55,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 2830 transitions. [2021-12-06 19:11:55,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 19:11:55,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:11:55,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:11:55,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 19:11:55,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2cfaba-67b6-4bf9-b844-063422c686d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 19:11:55,933 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:11:55,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:55,933 INFO L85 PathProgramCache]: Analyzing trace with hash 451963073, now seen corresponding path program 1 times [2021-12-06 19:11:55,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:55,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067845639] [2021-12-06 19:11:55,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:55,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:55,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:11:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:55,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:11:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:56,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:11:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:56,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 19:11:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:56,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 19:11:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:11:56,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:11:56,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067845639] [2021-12-06 19:11:56,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067845639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:11:56,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:11:56,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:11:56,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137205454] [2021-12-06 19:11:56,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:11:56,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:11:56,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:11:56,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:11:56,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:11:56,025 INFO L87 Difference]: Start difference. First operand 2261 states and 2830 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:11:57,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:11:57,119 INFO L93 Difference]: Finished difference Result 2705 states and 3546 transitions. [2021-12-06 19:11:57,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:11:57,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2021-12-06 19:11:57,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:11:57,124 INFO L225 Difference]: With dead ends: 2705 [2021-12-06 19:11:57,124 INFO L226 Difference]: Without dead ends: 2381 [2021-12-06 19:11:57,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:11:57,125 INFO L933 BasicCegarLoop]: 702 mSDtfsCounter, 992 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1014 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:11:57,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1014 Valid, 1254 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 19:11:57,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-12-06 19:11:57,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2261. [2021-12-06 19:11:57,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2261 states, 1832 states have (on average 1.2456331877729259) internal successors, (2282), 1854 states have internal predecessors, (2282), 215 states have call successors, (215), 168 states have call predecessors, (215), 212 states have return successors, (332), 239 states have call predecessors, (332), 212 states have call successors, (332) [2021-12-06 19:11:57,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 2829 transitions. [2021-12-06 19:11:57,253 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 2829 transitions. Word has length 157 [2021-12-06 19:11:57,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:11:57,253 INFO L470 AbstractCegarLoop]: Abstraction has 2261 states and 2829 transitions. [2021-12-06 19:11:57,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:11:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 2829 transitions. [2021-12-06 19:11:57,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 19:11:57,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:11:57,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:11:57,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 19:11:57,255 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:11:57,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:57,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1445016385, now seen corresponding path program 1 times [2021-12-06 19:11:57,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:57,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430705029] [2021-12-06 19:11:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:57,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:57,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:11:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:57,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:11:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:57,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:11:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:57,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 19:11:57,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:57,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 19:11:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:11:57,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:11:57,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430705029] [2021-12-06 19:11:57,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430705029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:11:57,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:11:57,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:11:57,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098860158] [2021-12-06 19:11:57,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:11:57,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:11:57,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:11:57,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:11:57,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:11:57,351 INFO L87 Difference]: Start difference. First operand 2261 states and 2829 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:11:59,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:11:59,235 INFO L93 Difference]: Finished difference Result 3147 states and 4260 transitions. [2021-12-06 19:11:59,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:11:59,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 4 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 157 [2021-12-06 19:11:59,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:11:59,241 INFO L225 Difference]: With dead ends: 3147 [2021-12-06 19:11:59,241 INFO L226 Difference]: Without dead ends: 2831 [2021-12-06 19:11:59,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:11:59,242 INFO L933 BasicCegarLoop]: 779 mSDtfsCounter, 1554 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1581 SdHoareTripleChecker+Valid, 1934 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:11:59,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1581 Valid, 1934 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1821 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 19:11:59,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2021-12-06 19:11:59,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 2590. [2021-12-06 19:11:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2590 states, 2135 states have (on average 1.2955503512880562) internal successors, (2766), 2158 states have internal predecessors, (2766), 234 states have call successors, (234), 174 states have call predecessors, (234), 219 states have return successors, (354), 258 states have call predecessors, (354), 231 states have call successors, (354) [2021-12-06 19:11:59,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2590 states to 2590 states and 3354 transitions. [2021-12-06 19:11:59,399 INFO L78 Accepts]: Start accepts. Automaton has 2590 states and 3354 transitions. Word has length 157 [2021-12-06 19:11:59,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:11:59,400 INFO L470 AbstractCegarLoop]: Abstraction has 2590 states and 3354 transitions. [2021-12-06 19:11:59,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:11:59,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2590 states and 3354 transitions. [2021-12-06 19:11:59,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 19:11:59,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:11:59,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:11:59,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 19:11:59,402 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:11:59,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:59,403 INFO L85 PathProgramCache]: Analyzing trace with hash -778981189, now seen corresponding path program 1 times [2021-12-06 19:11:59,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:59,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767652093] [2021-12-06 19:11:59,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:59,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:59,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:11:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:59,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:11:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:59,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:11:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:59,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 19:11:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:59,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 19:11:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:11:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:11:59,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:11:59,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767652093] [2021-12-06 19:11:59,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767652093] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:11:59,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:11:59,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:11:59,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734972063] [2021-12-06 19:11:59,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:11:59,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:11:59,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:11:59,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:11:59,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:11:59,498 INFO L87 Difference]: Start difference. First operand 2590 states and 3354 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:12:01,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:01,693 INFO L93 Difference]: Finished difference Result 3940 states and 5536 transitions. [2021-12-06 19:12:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 19:12:01,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 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 157 [2021-12-06 19:12:01,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:01,700 INFO L225 Difference]: With dead ends: 3940 [2021-12-06 19:12:01,700 INFO L226 Difference]: Without dead ends: 3295 [2021-12-06 19:12:01,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:12:01,702 INFO L933 BasicCegarLoop]: 1005 mSDtfsCounter, 1573 mSDsluCounter, 1968 mSDsCounter, 0 mSdLazyCounter, 2814 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1600 SdHoareTripleChecker+Valid, 2973 SdHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:01,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1600 Valid, 2973 Invalid, 2923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2814 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 19:12:01,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3295 states. [2021-12-06 19:12:01,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3295 to 2896. [2021-12-06 19:12:01,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2415 states have (on average 1.3267080745341615) internal successors, (3204), 2439 states have internal predecessors, (3204), 253 states have call successors, (253), 180 states have call predecessors, (253), 226 states have return successors, (375), 278 states have call predecessors, (375), 250 states have call successors, (375) [2021-12-06 19:12:01,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 3832 transitions. [2021-12-06 19:12:01,865 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 3832 transitions. Word has length 157 [2021-12-06 19:12:01,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:01,866 INFO L470 AbstractCegarLoop]: Abstraction has 2896 states and 3832 transitions. [2021-12-06 19:12:01,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:12:01,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 3832 transitions. [2021-12-06 19:12:01,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 19:12:01,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:01,868 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:01,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 19:12:01,869 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:01,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:01,869 INFO L85 PathProgramCache]: Analyzing trace with hash 619972413, now seen corresponding path program 1 times [2021-12-06 19:12:01,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:01,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598701256] [2021-12-06 19:12:01,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:01,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:01,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:12:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:01,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:12:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:01,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:12:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:01,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 19:12:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:01,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 19:12:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:01,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:01,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598701256] [2021-12-06 19:12:01,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598701256] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:01,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:01,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:12:01,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939496310] [2021-12-06 19:12:01,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:01,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:12:01,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:01,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:12:01,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:12:01,979 INFO L87 Difference]: Start difference. First operand 2896 states and 3832 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:12:04,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:04,347 INFO L93 Difference]: Finished difference Result 5109 states and 7402 transitions. [2021-12-06 19:12:04,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 19:12:04,348 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 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 157 [2021-12-06 19:12:04,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:04,358 INFO L225 Difference]: With dead ends: 5109 [2021-12-06 19:12:04,359 INFO L226 Difference]: Without dead ends: 4158 [2021-12-06 19:12:04,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:12:04,363 INFO L933 BasicCegarLoop]: 997 mSDtfsCounter, 1570 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 2820 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1597 SdHoareTripleChecker+Valid, 2961 SdHoareTripleChecker+Invalid, 2932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:04,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1597 Valid, 2961 Invalid, 2932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2820 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 19:12:04,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4158 states. [2021-12-06 19:12:04,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4158 to 3509. [2021-12-06 19:12:04,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3509 states, 2976 states have (on average 1.3713037634408602) internal successors, (4081), 3002 states have internal predecessors, (4081), 291 states have call successors, (291), 192 states have call predecessors, (291), 240 states have return successors, (421), 318 states have call predecessors, (421), 288 states have call successors, (421) [2021-12-06 19:12:04,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3509 states to 3509 states and 4793 transitions. [2021-12-06 19:12:04,563 INFO L78 Accepts]: Start accepts. Automaton has 3509 states and 4793 transitions. Word has length 157 [2021-12-06 19:12:04,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:04,563 INFO L470 AbstractCegarLoop]: Abstraction has 3509 states and 4793 transitions. [2021-12-06 19:12:04,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:12:04,563 INFO L276 IsEmpty]: Start isEmpty. Operand 3509 states and 4793 transitions. [2021-12-06 19:12:04,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 19:12:04,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:04,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:04,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 19:12:04,566 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:04,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:04,566 INFO L85 PathProgramCache]: Analyzing trace with hash -997468037, now seen corresponding path program 1 times [2021-12-06 19:12:04,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:04,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640751167] [2021-12-06 19:12:04,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:04,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:04,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:12:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:04,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:12:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:04,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:12:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:04,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 19:12:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:04,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 19:12:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:04,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:04,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640751167] [2021-12-06 19:12:04,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640751167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:04,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:04,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:12:04,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668214309] [2021-12-06 19:12:04,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:04,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:12:04,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:04,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:12:04,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:12:04,654 INFO L87 Difference]: Start difference. First operand 3509 states and 4793 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:12:06,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:06,878 INFO L93 Difference]: Finished difference Result 7358 states and 10971 transitions. [2021-12-06 19:12:06,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 19:12:06,879 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 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 157 [2021-12-06 19:12:06,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:06,893 INFO L225 Difference]: With dead ends: 7358 [2021-12-06 19:12:06,893 INFO L226 Difference]: Without dead ends: 5794 [2021-12-06 19:12:06,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:12:06,898 INFO L933 BasicCegarLoop]: 769 mSDtfsCounter, 1666 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 2509 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1693 SdHoareTripleChecker+Valid, 2148 SdHoareTripleChecker+Invalid, 2658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:06,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1693 Valid, 2148 Invalid, 2658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2509 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 19:12:06,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5794 states. [2021-12-06 19:12:07,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5794 to 4736. [2021-12-06 19:12:07,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4736 states, 4099 states have (on average 1.4235179312027324) internal successors, (5835), 4129 states have internal predecessors, (5835), 367 states have call successors, (367), 216 states have call predecessors, (367), 268 states have return successors, (519), 398 states have call predecessors, (519), 364 states have call successors, (519) [2021-12-06 19:12:07,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4736 states to 4736 states and 6721 transitions. [2021-12-06 19:12:07,204 INFO L78 Accepts]: Start accepts. Automaton has 4736 states and 6721 transitions. Word has length 157 [2021-12-06 19:12:07,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:07,204 INFO L470 AbstractCegarLoop]: Abstraction has 4736 states and 6721 transitions. [2021-12-06 19:12:07,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:12:07,204 INFO L276 IsEmpty]: Start isEmpty. Operand 4736 states and 6721 transitions. [2021-12-06 19:12:07,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 19:12:07,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:07,209 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:07,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 19:12:07,209 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:07,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:07,210 INFO L85 PathProgramCache]: Analyzing trace with hash -634001539, now seen corresponding path program 1 times [2021-12-06 19:12:07,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:07,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047263893] [2021-12-06 19:12:07,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:07,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:07,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:12:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:07,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:12:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:07,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:12:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:07,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 19:12:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:07,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 19:12:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:07,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:07,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047263893] [2021-12-06 19:12:07,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047263893] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:07,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:07,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:12:07,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715744212] [2021-12-06 19:12:07,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:07,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:12:07,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:07,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:12:07,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:12:07,301 INFO L87 Difference]: Start difference. First operand 4736 states and 6721 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:12:09,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:09,883 INFO L93 Difference]: Finished difference Result 11855 states and 18125 transitions. [2021-12-06 19:12:09,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 19:12:09,884 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 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 157 [2021-12-06 19:12:09,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:09,903 INFO L225 Difference]: With dead ends: 11855 [2021-12-06 19:12:09,903 INFO L226 Difference]: Without dead ends: 9064 [2021-12-06 19:12:09,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:12:09,909 INFO L933 BasicCegarLoop]: 989 mSDtfsCounter, 1562 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 2810 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1589 SdHoareTripleChecker+Valid, 2953 SdHoareTripleChecker+Invalid, 2922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:09,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1589 Valid, 2953 Invalid, 2922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2810 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 19:12:09,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9064 states. [2021-12-06 19:12:10,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9064 to 7195. [2021-12-06 19:12:10,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7195 states, 6350 states have (on average 1.4722834645669292) internal successors, (9349), 6388 states have internal predecessors, (9349), 519 states have call successors, (519), 264 states have call predecessors, (519), 324 states have return successors, (733), 558 states have call predecessors, (733), 516 states have call successors, (733) [2021-12-06 19:12:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7195 states to 7195 states and 10601 transitions. [2021-12-06 19:12:10,320 INFO L78 Accepts]: Start accepts. Automaton has 7195 states and 10601 transitions. Word has length 157 [2021-12-06 19:12:10,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:10,320 INFO L470 AbstractCegarLoop]: Abstraction has 7195 states and 10601 transitions. [2021-12-06 19:12:10,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:12:10,320 INFO L276 IsEmpty]: Start isEmpty. Operand 7195 states and 10601 transitions. [2021-12-06 19:12:10,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 19:12:10,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:10,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:10,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 19:12:10,324 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:10,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:10,324 INFO L85 PathProgramCache]: Analyzing trace with hash -345182149, now seen corresponding path program 1 times [2021-12-06 19:12:10,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:10,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581935149] [2021-12-06 19:12:10,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:10,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:10,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:12:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:10,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:12:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:10,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:12:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:10,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 19:12:10,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:10,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 19:12:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:10,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:10,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581935149] [2021-12-06 19:12:10,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581935149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:10,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:10,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:12:10,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628628703] [2021-12-06 19:12:10,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:10,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:12:10,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:10,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:12:10,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:12:10,414 INFO L87 Difference]: Start difference. First operand 7195 states and 10601 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:12:13,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:13,334 INFO L93 Difference]: Finished difference Result 20848 states and 32491 transitions. [2021-12-06 19:12:13,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 19:12:13,335 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 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 157 [2021-12-06 19:12:13,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:13,366 INFO L225 Difference]: With dead ends: 20848 [2021-12-06 19:12:13,366 INFO L226 Difference]: Without dead ends: 15598 [2021-12-06 19:12:13,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:12:13,380 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 1561 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 2802 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1588 SdHoareTripleChecker+Valid, 2947 SdHoareTripleChecker+Invalid, 2917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:13,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1588 Valid, 2947 Invalid, 2917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2802 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 19:12:13,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15598 states. [2021-12-06 19:12:14,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15598 to 12126. [2021-12-06 19:12:14,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12126 states, 10865 states have (on average 1.5089737689829728) internal successors, (16395), 10919 states have internal predecessors, (16395), 823 states have call successors, (823), 360 states have call predecessors, (823), 436 states have return successors, (1215), 878 states have call predecessors, (1215), 820 states have call successors, (1215) [2021-12-06 19:12:14,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12126 states to 12126 states and 18433 transitions. [2021-12-06 19:12:14,147 INFO L78 Accepts]: Start accepts. Automaton has 12126 states and 18433 transitions. Word has length 157 [2021-12-06 19:12:14,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:14,148 INFO L470 AbstractCegarLoop]: Abstraction has 12126 states and 18433 transitions. [2021-12-06 19:12:14,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:12:14,148 INFO L276 IsEmpty]: Start isEmpty. Operand 12126 states and 18433 transitions. [2021-12-06 19:12:14,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 19:12:14,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:14,153 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:14,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 19:12:14,153 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:14,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:14,154 INFO L85 PathProgramCache]: Analyzing trace with hash -890054723, now seen corresponding path program 1 times [2021-12-06 19:12:14,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:14,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947543903] [2021-12-06 19:12:14,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:14,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:14,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:12:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:14,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:12:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:14,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:12:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:14,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 19:12:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:14,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 19:12:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:14,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:14,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947543903] [2021-12-06 19:12:14,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947543903] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:14,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:14,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:12:14,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109271324] [2021-12-06 19:12:14,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:14,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:12:14,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:14,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:12:14,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:12:14,250 INFO L87 Difference]: Start difference. First operand 12126 states and 18433 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:12:18,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:18,096 INFO L93 Difference]: Finished difference Result 38802 states and 61353 transitions. [2021-12-06 19:12:18,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 19:12:18,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 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 157 [2021-12-06 19:12:18,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:18,162 INFO L225 Difference]: With dead ends: 38802 [2021-12-06 19:12:18,162 INFO L226 Difference]: Without dead ends: 28621 [2021-12-06 19:12:18,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:12:18,183 INFO L933 BasicCegarLoop]: 975 mSDtfsCounter, 1556 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 2782 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1583 SdHoareTripleChecker+Valid, 2939 SdHoareTripleChecker+Invalid, 2898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:18,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1583 Valid, 2939 Invalid, 2898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2782 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 19:12:18,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28621 states. [2021-12-06 19:12:19,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28621 to 22050. [2021-12-06 19:12:19,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22050 states, 19957 states have (on average 1.5330460490053615) internal successors, (30595), 20043 states have internal predecessors, (30595), 1431 states have call successors, (1431), 552 states have call predecessors, (1431), 660 states have return successors, (2341), 1518 states have call predecessors, (2341), 1428 states have call successors, (2341) [2021-12-06 19:12:19,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22050 states to 22050 states and 34367 transitions. [2021-12-06 19:12:19,535 INFO L78 Accepts]: Start accepts. Automaton has 22050 states and 34367 transitions. Word has length 157 [2021-12-06 19:12:19,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:19,535 INFO L470 AbstractCegarLoop]: Abstraction has 22050 states and 34367 transitions. [2021-12-06 19:12:19,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:12:19,535 INFO L276 IsEmpty]: Start isEmpty. Operand 22050 states and 34367 transitions. [2021-12-06 19:12:19,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 19:12:19,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:19,547 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:19,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 19:12:19,547 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:19,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1838106689, now seen corresponding path program 1 times [2021-12-06 19:12:19,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:19,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396282310] [2021-12-06 19:12:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:19,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:19,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:12:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:19,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:12:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:19,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:12:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:19,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 19:12:19,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:19,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 19:12:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:19,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:19,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396282310] [2021-12-06 19:12:19,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396282310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:19,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:19,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:12:19,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700094371] [2021-12-06 19:12:19,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:19,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:12:19,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:19,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:12:19,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:12:19,633 INFO L87 Difference]: Start difference. First operand 22050 states and 34367 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:12:25,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:25,276 INFO L93 Difference]: Finished difference Result 74776 states and 119805 transitions. [2021-12-06 19:12:25,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 19:12:25,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 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 157 [2021-12-06 19:12:25,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:25,414 INFO L225 Difference]: With dead ends: 74776 [2021-12-06 19:12:25,414 INFO L226 Difference]: Without dead ends: 54671 [2021-12-06 19:12:25,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:12:25,459 INFO L933 BasicCegarLoop]: 970 mSDtfsCounter, 1555 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 2774 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1582 SdHoareTripleChecker+Valid, 2934 SdHoareTripleChecker+Invalid, 2890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:25,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1582 Valid, 2934 Invalid, 2890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2774 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 19:12:25,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54671 states. [2021-12-06 19:12:28,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54671 to 41959. [2021-12-06 19:12:28,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41959 states, 38202 states have (on average 1.5466467724202921) internal successors, (59085), 38352 states have internal predecessors, (59085), 2647 states have call successors, (2647), 936 states have call predecessors, (2647), 1108 states have return successors, (5079), 2798 states have call predecessors, (5079), 2644 states have call successors, (5079) [2021-12-06 19:12:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41959 states to 41959 states and 66811 transitions. [2021-12-06 19:12:28,237 INFO L78 Accepts]: Start accepts. Automaton has 41959 states and 66811 transitions. Word has length 157 [2021-12-06 19:12:28,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:28,237 INFO L470 AbstractCegarLoop]: Abstraction has 41959 states and 66811 transitions. [2021-12-06 19:12:28,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:12:28,237 INFO L276 IsEmpty]: Start isEmpty. Operand 41959 states and 66811 transitions. [2021-12-06 19:12:28,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 19:12:28,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:28,253 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:28,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 19:12:28,253 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:28,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:28,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1872088957, now seen corresponding path program 1 times [2021-12-06 19:12:28,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:28,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992525238] [2021-12-06 19:12:28,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:28,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:28,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:12:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:28,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:12:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:28,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:12:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:28,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 19:12:28,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:28,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 19:12:28,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:28,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:28,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992525238] [2021-12-06 19:12:28,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992525238] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:28,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:28,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:12:28,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914081005] [2021-12-06 19:12:28,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:28,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:12:28,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:28,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:12:28,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:12:28,331 INFO L87 Difference]: Start difference. First operand 41959 states and 66811 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:12:33,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:33,264 INFO L93 Difference]: Finished difference Result 95474 states and 155832 transitions. [2021-12-06 19:12:33,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:12:33,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 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 157 [2021-12-06 19:12:33,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:33,439 INFO L225 Difference]: With dead ends: 95474 [2021-12-06 19:12:33,439 INFO L226 Difference]: Without dead ends: 55460 [2021-12-06 19:12:33,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:12:33,499 INFO L933 BasicCegarLoop]: 658 mSDtfsCounter, 1384 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:33,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1412 Valid, 1477 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 19:12:33,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55460 states. [2021-12-06 19:12:36,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55460 to 41959. [2021-12-06 19:12:36,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41959 states, 38202 states have (on average 1.5432699858646144) internal successors, (58956), 38352 states have internal predecessors, (58956), 2647 states have call successors, (2647), 936 states have call predecessors, (2647), 1108 states have return successors, (5079), 2798 states have call predecessors, (5079), 2644 states have call successors, (5079) [2021-12-06 19:12:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41959 states to 41959 states and 66682 transitions. [2021-12-06 19:12:36,429 INFO L78 Accepts]: Start accepts. Automaton has 41959 states and 66682 transitions. Word has length 157 [2021-12-06 19:12:36,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:36,429 INFO L470 AbstractCegarLoop]: Abstraction has 41959 states and 66682 transitions. [2021-12-06 19:12:36,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:12:36,429 INFO L276 IsEmpty]: Start isEmpty. Operand 41959 states and 66682 transitions. [2021-12-06 19:12:36,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 19:12:36,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:36,449 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:36,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 19:12:36,449 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:36,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:36,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1437583359, now seen corresponding path program 1 times [2021-12-06 19:12:36,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:36,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203588073] [2021-12-06 19:12:36,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:36,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:36,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:12:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:36,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:12:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:36,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:12:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:36,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 19:12:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:36,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 19:12:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:36,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:36,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:36,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203588073] [2021-12-06 19:12:36,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203588073] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:36,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:36,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:12:36,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135177058] [2021-12-06 19:12:36,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:36,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:12:36,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:36,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:12:36,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:12:36,535 INFO L87 Difference]: Start difference. First operand 41959 states and 66682 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:12:41,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:41,653 INFO L93 Difference]: Finished difference Result 95344 states and 155185 transitions. [2021-12-06 19:12:41,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:12:41,654 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 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 157 [2021-12-06 19:12:41,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:41,844 INFO L225 Difference]: With dead ends: 95344 [2021-12-06 19:12:41,844 INFO L226 Difference]: Without dead ends: 55330 [2021-12-06 19:12:41,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:12:41,903 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 1188 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:41,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1216 Valid, 1702 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1350 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 19:12:41,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55330 states. [2021-12-06 19:12:44,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55330 to 41959. [2021-12-06 19:12:44,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41959 states, 38202 states have (on average 1.5398931993089366) internal successors, (58827), 38352 states have internal predecessors, (58827), 2647 states have call successors, (2647), 936 states have call predecessors, (2647), 1108 states have return successors, (5079), 2798 states have call predecessors, (5079), 2644 states have call successors, (5079) [2021-12-06 19:12:44,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41959 states to 41959 states and 66553 transitions. [2021-12-06 19:12:44,994 INFO L78 Accepts]: Start accepts. Automaton has 41959 states and 66553 transitions. Word has length 157 [2021-12-06 19:12:44,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:44,994 INFO L470 AbstractCegarLoop]: Abstraction has 41959 states and 66553 transitions. [2021-12-06 19:12:44,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:12:44,995 INFO L276 IsEmpty]: Start isEmpty. Operand 41959 states and 66553 transitions. [2021-12-06 19:12:45,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 19:12:45,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:45,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:45,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 19:12:45,008 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:45,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:45,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1007925053, now seen corresponding path program 1 times [2021-12-06 19:12:45,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:45,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272630941] [2021-12-06 19:12:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:45,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:45,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:12:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:45,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:12:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:45,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:12:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:45,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 19:12:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:45,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 19:12:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:45,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:45,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272630941] [2021-12-06 19:12:45,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272630941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:45,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:45,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:12:45,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296704213] [2021-12-06 19:12:45,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:45,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:12:45,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:45,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:12:45,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:12:45,092 INFO L87 Difference]: Start difference. First operand 41959 states and 66553 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:12:58,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:58,710 INFO L93 Difference]: Finished difference Result 165535 states and 265933 transitions. [2021-12-06 19:12:58,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 19:12:58,711 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 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 157 [2021-12-06 19:12:58,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:59,048 INFO L225 Difference]: With dead ends: 165535 [2021-12-06 19:12:59,048 INFO L226 Difference]: Without dead ends: 125521 [2021-12-06 19:12:59,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:12:59,149 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 1733 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 2931 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1759 SdHoareTripleChecker+Valid, 2285 SdHoareTripleChecker+Invalid, 3083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:59,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1759 Valid, 2285 Invalid, 3083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2931 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 19:12:59,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125521 states. [2021-12-06 19:13:05,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125521 to 81778. [2021-12-06 19:13:05,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81778 states, 74821 states have (on average 1.5469587415297845) internal successors, (115745), 75099 states have internal predecessors, (115745), 4951 states have call successors, (4951), 1704 states have call predecessors, (4951), 2004 states have return successors, (11885), 5230 states have call predecessors, (11885), 4948 states have call successors, (11885) [2021-12-06 19:13:05,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81778 states to 81778 states and 132581 transitions. [2021-12-06 19:13:05,416 INFO L78 Accepts]: Start accepts. Automaton has 81778 states and 132581 transitions. Word has length 157 [2021-12-06 19:13:05,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:05,416 INFO L470 AbstractCegarLoop]: Abstraction has 81778 states and 132581 transitions. [2021-12-06 19:13:05,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:13:05,416 INFO L276 IsEmpty]: Start isEmpty. Operand 81778 states and 132581 transitions. [2021-12-06 19:13:05,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 19:13:05,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:05,437 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:05,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-06 19:13:05,437 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:05,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:05,438 INFO L85 PathProgramCache]: Analyzing trace with hash 301328447, now seen corresponding path program 1 times [2021-12-06 19:13:05,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:13:05,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878296593] [2021-12-06 19:13:05,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:05,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:13:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:05,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:13:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:05,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:13:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:05,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:13:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:05,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 19:13:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:05,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 19:13:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:05,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:13:05,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878296593] [2021-12-06 19:13:05,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878296593] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:05,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:05,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:13:05,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37841315] [2021-12-06 19:13:05,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:05,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:13:05,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:13:05,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:13:05,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:13:05,590 INFO L87 Difference]: Start difference. First operand 81778 states and 132581 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:13:31,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:31,192 INFO L93 Difference]: Finished difference Result 324280 states and 530327 transitions. [2021-12-06 19:13:31,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 19:13:31,193 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 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 157 [2021-12-06 19:13:31,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:31,990 INFO L225 Difference]: With dead ends: 324280 [2021-12-06 19:13:31,990 INFO L226 Difference]: Without dead ends: 244447 [2021-12-06 19:13:32,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:13:32,227 INFO L933 BasicCegarLoop]: 945 mSDtfsCounter, 1907 mSDsluCounter, 1953 mSDsCounter, 0 mSdLazyCounter, 2712 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1945 SdHoareTripleChecker+Valid, 2898 SdHoareTripleChecker+Invalid, 2833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 2712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:32,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1945 Valid, 2898 Invalid, 2833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2712 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 19:13:32,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244447 states. [2021-12-06 19:13:44,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244447 to 158723. [2021-12-06 19:13:44,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158723 states, 145494 states have (on average 1.5470809792843692) internal successors, (225091), 146028 states have internal predecessors, (225091), 9431 states have call successors, (9431), 3240 states have call predecessors, (9431), 3796 states have return successors, (29743), 9966 states have call predecessors, (29743), 9428 states have call successors, (29743) [2021-12-06 19:13:45,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158723 states to 158723 states and 264265 transitions. [2021-12-06 19:13:45,646 INFO L78 Accepts]: Start accepts. Automaton has 158723 states and 264265 transitions. Word has length 157 [2021-12-06 19:13:45,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:45,646 INFO L470 AbstractCegarLoop]: Abstraction has 158723 states and 264265 transitions. [2021-12-06 19:13:45,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:13:45,646 INFO L276 IsEmpty]: Start isEmpty. Operand 158723 states and 264265 transitions. [2021-12-06 19:13:45,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 19:13:45,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:45,691 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:45,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-06 19:13:45,691 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:45,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:45,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1248366333, now seen corresponding path program 1 times [2021-12-06 19:13:45,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:13:45,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893464673] [2021-12-06 19:13:45,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:45,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:13:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:45,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:13:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:45,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:13:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:45,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:13:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:45,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 19:13:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:45,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 19:13:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:45,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:13:45,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893464673] [2021-12-06 19:13:45,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893464673] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:45,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:45,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:13:45,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050114566] [2021-12-06 19:13:45,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:45,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:13:45,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:13:45,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:13:45,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:13:45,824 INFO L87 Difference]: Start difference. First operand 158723 states and 264265 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:14:36,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:14:36,962 INFO L93 Difference]: Finished difference Result 629351 states and 1054973 transitions. [2021-12-06 19:14:36,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 19:14:36,962 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 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 157 [2021-12-06 19:14:36,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:14:38,682 INFO L225 Difference]: With dead ends: 629351 [2021-12-06 19:14:38,682 INFO L226 Difference]: Without dead ends: 472573 [2021-12-06 19:14:39,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:14:39,248 INFO L933 BasicCegarLoop]: 1079 mSDtfsCounter, 1624 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 3126 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1650 SdHoareTripleChecker+Valid, 3035 SdHoareTripleChecker+Invalid, 3247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 3126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:14:39,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1650 Valid, 3035 Invalid, 3247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 3126 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 19:14:39,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472573 states. [2021-12-06 19:15:06,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472573 to 314916. [2021-12-06 19:15:06,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314916 states, 289399 states have (on average 1.5502645136990798) internal successors, (448645), 290445 states have internal predecessors, (448645), 18135 states have call successors, (18135), 6312 states have call predecessors, (18135), 7380 states have return successors, (78325), 19182 states have call predecessors, (78325), 18132 states have call successors, (78325) [2021-12-06 19:15:08,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314916 states to 314916 states and 545105 transitions. [2021-12-06 19:15:08,169 INFO L78 Accepts]: Start accepts. Automaton has 314916 states and 545105 transitions. Word has length 157 [2021-12-06 19:15:08,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:15:08,170 INFO L470 AbstractCegarLoop]: Abstraction has 314916 states and 545105 transitions. [2021-12-06 19:15:08,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:15:08,170 INFO L276 IsEmpty]: Start isEmpty. Operand 314916 states and 545105 transitions. [2021-12-06 19:15:08,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 19:15:08,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:15:08,263 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:15:08,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-06 19:15:08,263 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:15:08,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:15:08,263 INFO L85 PathProgramCache]: Analyzing trace with hash 2110199935, now seen corresponding path program 1 times [2021-12-06 19:15:08,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:15:08,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411593257] [2021-12-06 19:15:08,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:15:08,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:15:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:15:08,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:15:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:15:08,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:15:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:15:08,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:15:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:15:08,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 19:15:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:15:08,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 19:15:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:15:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:15:08,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:15:08,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411593257] [2021-12-06 19:15:08,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411593257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:15:08,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:15:08,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:15:08,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75602620] [2021-12-06 19:15:08,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:15:08,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:15:08,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:15:08,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:15:08,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:15:08,341 INFO L87 Difference]: Start difference. First operand 314916 states and 545105 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:15:49,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:15:49,591 INFO L93 Difference]: Finished difference Result 723552 states and 1299560 transitions. [2021-12-06 19:15:49,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:15:49,592 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 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 157 [2021-12-06 19:15:49,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:15:51,384 INFO L225 Difference]: With dead ends: 723552 [2021-12-06 19:15:51,384 INFO L226 Difference]: Without dead ends: 410581 [2021-12-06 19:15:52,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:15:52,246 INFO L933 BasicCegarLoop]: 637 mSDtfsCounter, 1188 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 1683 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:15:52,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1216 Valid, 1683 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 19:15:52,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410581 states. [2021-12-06 19:16:20,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410581 to 314916. [2021-12-06 19:16:21,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314916 states, 289399 states have (on average 1.5467226908178673) internal successors, (447620), 290445 states have internal predecessors, (447620), 18135 states have call successors, (18135), 6312 states have call predecessors, (18135), 7380 states have return successors, (78325), 19182 states have call predecessors, (78325), 18132 states have call successors, (78325) [2021-12-06 19:16:22,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314916 states to 314916 states and 544080 transitions. [2021-12-06 19:16:22,567 INFO L78 Accepts]: Start accepts. Automaton has 314916 states and 544080 transitions. Word has length 157 [2021-12-06 19:16:22,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:16:22,568 INFO L470 AbstractCegarLoop]: Abstraction has 314916 states and 544080 transitions. [2021-12-06 19:16:22,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:16:22,568 INFO L276 IsEmpty]: Start isEmpty. Operand 314916 states and 544080 transitions. [2021-12-06 19:16:22,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 19:16:22,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:16:22,661 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:16:22,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-06 19:16:22,661 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:16:22,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:16:22,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1696720255, now seen corresponding path program 1 times [2021-12-06 19:16:22,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:16:22,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839491799] [2021-12-06 19:16:22,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:16:22,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:16:22,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:16:22,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:16:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:16:22,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:16:22,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:16:22,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:16:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:16:22,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 19:16:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:16:22,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 19:16:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:16:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:16:22,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:16:22,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839491799] [2021-12-06 19:16:22,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839491799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:16:22,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:16:22,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:16:22,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926053589] [2021-12-06 19:16:22,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:16:22,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:16:22,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:16:22,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:16:22,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:16:22,740 INFO L87 Difference]: Start difference. First operand 314916 states and 544080 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:18:04,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:18:04,512 INFO L93 Difference]: Finished difference Result 1206466 states and 2104775 transitions. [2021-12-06 19:18:04,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 19:18:04,512 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 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 157 [2021-12-06 19:18:04,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:18:08,383 INFO L225 Difference]: With dead ends: 1206466 [2021-12-06 19:18:08,384 INFO L226 Difference]: Without dead ends: 893495 [2021-12-06 19:18:09,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:18:09,965 INFO L933 BasicCegarLoop]: 1016 mSDtfsCounter, 1582 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 2984 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1608 SdHoareTripleChecker+Valid, 2972 SdHoareTripleChecker+Invalid, 3105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 2984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:18:09,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1608 Valid, 2972 Invalid, 3105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2984 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 19:18:10,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893495 states. [2021-12-06 19:19:10,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893495 to 628839. [2021-12-06 19:19:10,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628839 states, 579258 states have (on average 1.5490334186148487) internal successors, (897290), 581328 states have internal predecessors, (897290), 35031 states have call successors, (35031), 12456 states have call predecessors, (35031), 14548 states have return successors, (214343), 37102 states have call predecessors, (214343), 35028 states have call successors, (214343) [2021-12-06 19:19:14,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628839 states to 628839 states and 1146664 transitions. [2021-12-06 19:19:14,109 INFO L78 Accepts]: Start accepts. Automaton has 628839 states and 1146664 transitions. Word has length 157 [2021-12-06 19:19:14,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:19:14,109 INFO L470 AbstractCegarLoop]: Abstraction has 628839 states and 1146664 transitions. [2021-12-06 19:19:14,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:19:14,109 INFO L276 IsEmpty]: Start isEmpty. Operand 628839 states and 1146664 transitions. [2021-12-06 19:19:14,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 19:19:14,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:19:14,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:19:14,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-06 19:19:14,314 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:19:14,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:19:14,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1505611839, now seen corresponding path program 1 times [2021-12-06 19:19:14,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:19:14,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075396692] [2021-12-06 19:19:14,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:19:14,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:19:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:19:14,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 19:19:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:19:14,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:19:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:19:14,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:19:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:19:14,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 19:19:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:19:14,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 19:19:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:19:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:19:14,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:19:14,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075396692] [2021-12-06 19:19:14,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075396692] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:19:14,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:19:14,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:19:14,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018495965] [2021-12-06 19:19:14,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:19:14,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:19:14,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:19:14,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:19:14,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:19:14,393 INFO L87 Difference]: Start difference. First operand 628839 states and 1146664 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 19:22:37,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:22:37,227 INFO L93 Difference]: Finished difference Result 2374531 states and 4384913 transitions. [2021-12-06 19:22:37,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 19:22:37,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 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 157 [2021-12-06 19:22:37,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:22:46,428 INFO L225 Difference]: With dead ends: 2374531 [2021-12-06 19:22:46,428 INFO L226 Difference]: Without dead ends: 1747637 [2021-12-06 19:22:49,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:22:49,763 INFO L933 BasicCegarLoop]: 919 mSDtfsCounter, 1702 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 2657 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1740 SdHoareTripleChecker+Valid, 2875 SdHoareTripleChecker+Invalid, 2781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:22:49,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1740 Valid, 2875 Invalid, 2781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2657 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 19:22:50,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747637 states.