./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec6_product33.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/bin/uautomizer-wIGwrQj20G --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 f589c9222141e642cc5dd52da93380b476d19c138575c9f6da35a3e335e5e2df --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 14:11:02,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 14:11:02,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 14:11:02,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 14:11:02,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 14:11:02,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 14:11:02,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 14:11:02,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 14:11:02,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 14:11:02,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 14:11:02,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 14:11:02,829 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 14:11:02,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 14:11:02,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 14:11:02,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 14:11:02,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 14:11:02,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 14:11:02,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 14:11:02,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 14:11:02,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 14:11:02,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 14:11:02,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 14:11:02,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 14:11:02,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 14:11:02,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 14:11:02,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 14:11:02,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 14:11:02,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 14:11:02,878 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 14:11:02,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 14:11:02,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 14:11:02,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 14:11:02,883 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 14:11:02,884 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 14:11:02,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 14:11:02,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 14:11:02,887 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 14:11:02,887 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 14:11:02,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 14:11:02,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 14:11:02,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 14:11:02,890 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 14:11:02,921 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 14:11:02,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 14:11:02,921 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 14:11:02,922 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 14:11:02,923 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 14:11:02,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 14:11:02,931 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 14:11:02,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 14:11:02,931 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 14:11:02,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 14:11:02,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 14:11:02,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 14:11:02,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 14:11:02,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 14:11:02,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 14:11:02,934 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 14:11:02,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 14:11:02,934 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 14:11:02,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 14:11:02,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 14:11:02,935 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 14:11:02,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 14:11:02,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:11:02,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 14:11:02,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 14:11:02,936 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 14:11:02,937 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 14:11:02,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 14:11:02,937 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 14:11:02,939 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 14:11:02,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 14:11:02,939 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 14:11:02,940 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_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f589c9222141e642cc5dd52da93380b476d19c138575c9f6da35a3e335e5e2df [2021-11-23 14:11:03,205 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 14:11:03,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 14:11:03,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 14:11:03,234 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 14:11:03,234 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 14:11:03,236 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/product-lines/email_spec6_product33.cil.c [2021-11-23 14:11:03,321 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/bin/uautomizer-wIGwrQj20G/data/17dd38bad/94307e8c3d5d4b2cbb84ca0ddc62d17f/FLAGacd0c2a4e [2021-11-23 14:11:03,995 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 14:11:03,996 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/sv-benchmarks/c/product-lines/email_spec6_product33.cil.c [2021-11-23 14:11:04,026 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/bin/uautomizer-wIGwrQj20G/data/17dd38bad/94307e8c3d5d4b2cbb84ca0ddc62d17f/FLAGacd0c2a4e [2021-11-23 14:11:04,159 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/bin/uautomizer-wIGwrQj20G/data/17dd38bad/94307e8c3d5d4b2cbb84ca0ddc62d17f [2021-11-23 14:11:04,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 14:11:04,164 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 14:11:04,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 14:11:04,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 14:11:04,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 14:11:04,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:11:04" (1/1) ... [2021-11-23 14:11:04,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45e6e898 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:04, skipping insertion in model container [2021-11-23 14:11:04,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:11:04" (1/1) ... [2021-11-23 14:11:04,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 14:11:04,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 14:11:04,528 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_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/sv-benchmarks/c/product-lines/email_spec6_product33.cil.c[1934,1947] [2021-11-23 14:11:05,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:11:05,051 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 14:11:05,075 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_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/sv-benchmarks/c/product-lines/email_spec6_product33.cil.c[1934,1947] [2021-11-23 14:11:05,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:11:05,239 INFO L208 MainTranslator]: Completed translation [2021-11-23 14:11:05,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:05 WrapperNode [2021-11-23 14:11:05,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 14:11:05,241 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 14:11:05,241 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 14:11:05,241 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 14:11:05,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:05" (1/1) ... [2021-11-23 14:11:05,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:05" (1/1) ... [2021-11-23 14:11:05,450 INFO L137 Inliner]: procedures = 135, calls = 235, calls flagged for inlining = 140, calls inlined = 207, statements flattened = 3182 [2021-11-23 14:11:05,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 14:11:05,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 14:11:05,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 14:11:05,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 14:11:05,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:05" (1/1) ... [2021-11-23 14:11:05,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:05" (1/1) ... [2021-11-23 14:11:05,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:05" (1/1) ... [2021-11-23 14:11:05,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:05" (1/1) ... [2021-11-23 14:11:05,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:05" (1/1) ... [2021-11-23 14:11:05,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:05" (1/1) ... [2021-11-23 14:11:05,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:05" (1/1) ... [2021-11-23 14:11:05,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 14:11:05,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 14:11:05,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 14:11:05,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 14:11:05,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:05" (1/1) ... [2021-11-23 14:11:05,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:11:05,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:11:05,628 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 14:11:05,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 14:11:05,680 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-23 14:11:05,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 14:11:05,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 14:11:05,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 14:11:05,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 14:11:05,941 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 14:11:05,943 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 14:11:07,769 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 14:11:07,796 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 14:11:07,798 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 14:11:07,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:11:07 BoogieIcfgContainer [2021-11-23 14:11:07,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 14:11:07,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 14:11:07,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 14:11:07,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 14:11:07,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:11:04" (1/3) ... [2021-11-23 14:11:07,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a2a8b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:11:07, skipping insertion in model container [2021-11-23 14:11:07,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:05" (2/3) ... [2021-11-23 14:11:07,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a2a8b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:11:07, skipping insertion in model container [2021-11-23 14:11:07,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:11:07" (3/3) ... [2021-11-23 14:11:07,820 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec6_product33.cil.c [2021-11-23 14:11:07,828 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 14:11:07,828 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 14:11:07,891 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 14:11:07,899 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 [2021-11-23 14:11:07,900 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 14:11:07,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 663 states, 660 states have (on average 1.6712121212121211) internal successors, (1103), 662 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:07,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 14:11:07,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:07,950 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] [2021-11-23 14:11:07,951 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:07,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:07,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1884745015, now seen corresponding path program 1 times [2021-11-23 14:11:07,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:07,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455090247] [2021-11-23 14:11:07,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:07,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:08,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:08,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455090247] [2021-11-23 14:11:08,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455090247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:08,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:08,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:08,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240834171] [2021-11-23 14:11:08,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:08,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:08,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:08,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:08,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:08,515 INFO L87 Difference]: Start difference. First operand has 663 states, 660 states have (on average 1.6712121212121211) internal successors, (1103), 662 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:08,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:08,882 INFO L93 Difference]: Finished difference Result 1944 states and 3241 transitions. [2021-11-23 14:11:08,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:08,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-23 14:11:08,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:08,916 INFO L225 Difference]: With dead ends: 1944 [2021-11-23 14:11:08,916 INFO L226 Difference]: Without dead ends: 1031 [2021-11-23 14:11:08,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:08,930 INFO L933 BasicCegarLoop]: 2153 mSDtfsCounter, 1072 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 3220 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:08,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 3220 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:11:08,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-11-23 14:11:09,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 526. [2021-11-23 14:11:09,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 524 states have (on average 1.6812977099236641) internal successors, (881), 525 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:09,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 881 transitions. [2021-11-23 14:11:09,036 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 881 transitions. Word has length 61 [2021-11-23 14:11:09,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:09,037 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 881 transitions. [2021-11-23 14:11:09,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:09,038 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 881 transitions. [2021-11-23 14:11:09,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 14:11:09,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:09,046 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] [2021-11-23 14:11:09,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 14:11:09,046 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:09,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:09,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1720204198, now seen corresponding path program 1 times [2021-11-23 14:11:09,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:09,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158163588] [2021-11-23 14:11:09,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:09,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:09,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:09,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158163588] [2021-11-23 14:11:09,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158163588] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:09,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:09,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:11:09,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234387665] [2021-11-23 14:11:09,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:09,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:11:09,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:09,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:11:09,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:11:09,175 INFO L87 Difference]: Start difference. First operand 526 states and 881 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:09,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:09,633 INFO L93 Difference]: Finished difference Result 1519 states and 2551 transitions. [2021-11-23 14:11:09,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 14:11:09,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-23 14:11:09,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:09,643 INFO L225 Difference]: With dead ends: 1519 [2021-11-23 14:11:09,643 INFO L226 Difference]: Without dead ends: 1016 [2021-11-23 14:11:09,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 14:11:09,652 INFO L933 BasicCegarLoop]: 1670 mSDtfsCounter, 1716 mSDsluCounter, 2497 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1716 SdHoareTripleChecker+Valid, 4167 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:09,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1716 Valid, 4167 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:11:09,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-11-23 14:11:09,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 526. [2021-11-23 14:11:09,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 524 states have (on average 1.6793893129770991) internal successors, (880), 525 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:09,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 880 transitions. [2021-11-23 14:11:09,703 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 880 transitions. Word has length 63 [2021-11-23 14:11:09,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:09,704 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 880 transitions. [2021-11-23 14:11:09,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:09,704 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 880 transitions. [2021-11-23 14:11:09,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 14:11:09,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:09,707 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] [2021-11-23 14:11:09,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 14:11:09,708 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:09,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:09,709 INFO L85 PathProgramCache]: Analyzing trace with hash 2137918657, now seen corresponding path program 1 times [2021-11-23 14:11:09,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:09,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461351500] [2021-11-23 14:11:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:09,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:09,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:09,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461351500] [2021-11-23 14:11:09,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461351500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:09,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:09,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:09,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692110942] [2021-11-23 14:11:09,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:09,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:09,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:09,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:09,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:09,793 INFO L87 Difference]: Start difference. First operand 526 states and 880 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:09,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:09,860 INFO L93 Difference]: Finished difference Result 1031 states and 1731 transitions. [2021-11-23 14:11:09,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:09,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-23 14:11:09,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:09,866 INFO L225 Difference]: With dead ends: 1031 [2021-11-23 14:11:09,866 INFO L226 Difference]: Without dead ends: 533 [2021-11-23 14:11:09,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:09,877 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 853 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:09,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 906 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:09,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-11-23 14:11:09,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 526. [2021-11-23 14:11:09,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 524 states have (on average 1.6736641221374047) internal successors, (877), 525 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:09,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 877 transitions. [2021-11-23 14:11:09,914 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 877 transitions. Word has length 64 [2021-11-23 14:11:09,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:09,915 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 877 transitions. [2021-11-23 14:11:09,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:09,915 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 877 transitions. [2021-11-23 14:11:09,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 14:11:09,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:09,920 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] [2021-11-23 14:11:09,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 14:11:09,921 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:09,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:09,922 INFO L85 PathProgramCache]: Analyzing trace with hash 79466876, now seen corresponding path program 1 times [2021-11-23 14:11:09,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:09,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774954354] [2021-11-23 14:11:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:09,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:09,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:10,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:10,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:10,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774954354] [2021-11-23 14:11:10,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774954354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:10,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:10,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:11:10,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462581658] [2021-11-23 14:11:10,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:10,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:11:10,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:10,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:11:10,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:11:10,064 INFO L87 Difference]: Start difference. First operand 526 states and 877 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:10,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:10,274 INFO L93 Difference]: Finished difference Result 1506 states and 2528 transitions. [2021-11-23 14:11:10,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 14:11:10,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-23 14:11:10,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:10,284 INFO L225 Difference]: With dead ends: 1506 [2021-11-23 14:11:10,285 INFO L226 Difference]: Without dead ends: 1013 [2021-11-23 14:11:10,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:11:10,294 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 4136 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4136 SdHoareTripleChecker+Valid, 1735 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:10,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4136 Valid, 1735 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:11:10,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-11-23 14:11:10,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 526. [2021-11-23 14:11:10,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 524 states have (on average 1.6717557251908397) internal successors, (876), 525 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:10,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 876 transitions. [2021-11-23 14:11:10,335 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 876 transitions. Word has length 66 [2021-11-23 14:11:10,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:10,335 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 876 transitions. [2021-11-23 14:11:10,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:10,336 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 876 transitions. [2021-11-23 14:11:10,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 14:11:10,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:10,339 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] [2021-11-23 14:11:10,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 14:11:10,340 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:10,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:10,342 INFO L85 PathProgramCache]: Analyzing trace with hash 675150315, now seen corresponding path program 1 times [2021-11-23 14:11:10,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:10,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559601555] [2021-11-23 14:11:10,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:10,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:10,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:10,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559601555] [2021-11-23 14:11:10,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559601555] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:10,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:10,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:11:10,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440571812] [2021-11-23 14:11:10,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:10,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:11:10,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:10,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:11:10,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:11:10,458 INFO L87 Difference]: Start difference. First operand 526 states and 876 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:10,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:10,669 INFO L93 Difference]: Finished difference Result 1513 states and 2534 transitions. [2021-11-23 14:11:10,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 14:11:10,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-23 14:11:10,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:10,677 INFO L225 Difference]: With dead ends: 1513 [2021-11-23 14:11:10,677 INFO L226 Difference]: Without dead ends: 1020 [2021-11-23 14:11:10,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:11:10,679 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 4140 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4140 SdHoareTripleChecker+Valid, 1738 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:10,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4140 Valid, 1738 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:11:10,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2021-11-23 14:11:10,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 526. [2021-11-23 14:11:10,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 524 states have (on average 1.6698473282442747) internal successors, (875), 525 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:10,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 875 transitions. [2021-11-23 14:11:10,725 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 875 transitions. Word has length 67 [2021-11-23 14:11:10,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:10,726 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 875 transitions. [2021-11-23 14:11:10,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:10,726 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 875 transitions. [2021-11-23 14:11:10,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 14:11:10,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:10,728 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] [2021-11-23 14:11:10,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 14:11:10,728 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:10,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:10,729 INFO L85 PathProgramCache]: Analyzing trace with hash 873100897, now seen corresponding path program 1 times [2021-11-23 14:11:10,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:10,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340463630] [2021-11-23 14:11:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:10,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:10,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:10,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340463630] [2021-11-23 14:11:10,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340463630] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:10,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:10,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:10,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348226469] [2021-11-23 14:11:10,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:10,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:10,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:10,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:10,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:10,792 INFO L87 Difference]: Start difference. First operand 526 states and 875 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:10,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:10,845 INFO L93 Difference]: Finished difference Result 792 states and 1301 transitions. [2021-11-23 14:11:10,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:10,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-23 14:11:10,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:10,849 INFO L225 Difference]: With dead ends: 792 [2021-11-23 14:11:10,850 INFO L226 Difference]: Without dead ends: 529 [2021-11-23 14:11:10,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:10,852 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 1 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:10,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1744 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:10,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-11-23 14:11:10,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 528. [2021-11-23 14:11:10,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 526 states have (on average 1.667300380228137) internal successors, (877), 527 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:10,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 877 transitions. [2021-11-23 14:11:10,892 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 877 transitions. Word has length 68 [2021-11-23 14:11:10,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:10,894 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 877 transitions. [2021-11-23 14:11:10,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:10,894 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 877 transitions. [2021-11-23 14:11:10,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 14:11:10,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:10,896 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, 1, 1, 1] [2021-11-23 14:11:10,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 14:11:10,896 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:10,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:10,897 INFO L85 PathProgramCache]: Analyzing trace with hash 990238588, now seen corresponding path program 1 times [2021-11-23 14:11:10,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:10,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070489777] [2021-11-23 14:11:10,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:10,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:10,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:10,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070489777] [2021-11-23 14:11:10,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070489777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:10,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:10,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:10,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228605875] [2021-11-23 14:11:10,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:10,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:10,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:10,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:10,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:10,971 INFO L87 Difference]: Start difference. First operand 528 states and 877 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:11,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:11,078 INFO L93 Difference]: Finished difference Result 1456 states and 2441 transitions. [2021-11-23 14:11:11,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:11,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-23 14:11:11,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:11,088 INFO L225 Difference]: With dead ends: 1456 [2021-11-23 14:11:11,088 INFO L226 Difference]: Without dead ends: 966 [2021-11-23 14:11:11,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:11,091 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 825 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 1650 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:11,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 1650 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:11,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-11-23 14:11:11,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 703. [2021-11-23 14:11:11,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 701 states have (on average 1.6947218259629102) internal successors, (1188), 702 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:11,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1188 transitions. [2021-11-23 14:11:11,164 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1188 transitions. Word has length 77 [2021-11-23 14:11:11,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:11,164 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1188 transitions. [2021-11-23 14:11:11,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:11,165 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1188 transitions. [2021-11-23 14:11:11,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 14:11:11,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:11,168 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, 1, 1, 1, 1] [2021-11-23 14:11:11,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 14:11:11,168 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:11,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:11,169 INFO L85 PathProgramCache]: Analyzing trace with hash 241286126, now seen corresponding path program 1 times [2021-11-23 14:11:11,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:11,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539759944] [2021-11-23 14:11:11,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:11,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:11,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:11,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539759944] [2021-11-23 14:11:11,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539759944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:11,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:11,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:11:11,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727602098] [2021-11-23 14:11:11,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:11,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:11:11,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:11,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:11:11,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:11:11,243 INFO L87 Difference]: Start difference. First operand 703 states and 1188 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:11,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:11,450 INFO L93 Difference]: Finished difference Result 2023 states and 3454 transitions. [2021-11-23 14:11:11,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 14:11:11,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-23 14:11:11,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:11,462 INFO L225 Difference]: With dead ends: 2023 [2021-11-23 14:11:11,462 INFO L226 Difference]: Without dead ends: 1358 [2021-11-23 14:11:11,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:11:11,465 INFO L933 BasicCegarLoop]: 1673 mSDtfsCounter, 1685 mSDsluCounter, 2509 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1685 SdHoareTripleChecker+Valid, 4182 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:11,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1685 Valid, 4182 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:11:11,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2021-11-23 14:11:11,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 703. [2021-11-23 14:11:11,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 701 states have (on average 1.6918687589158345) internal successors, (1186), 702 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:11,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1186 transitions. [2021-11-23 14:11:11,587 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1186 transitions. Word has length 78 [2021-11-23 14:11:11,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:11,589 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1186 transitions. [2021-11-23 14:11:11,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:11,590 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1186 transitions. [2021-11-23 14:11:11,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 14:11:11,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:11,592 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, 1, 1, 1, 1, 1] [2021-11-23 14:11:11,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 14:11:11,592 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:11,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:11,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2108212729, now seen corresponding path program 1 times [2021-11-23 14:11:11,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:11,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719814055] [2021-11-23 14:11:11,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:11,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:11,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:11,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719814055] [2021-11-23 14:11:11,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719814055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:11,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:11,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:11,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651095930] [2021-11-23 14:11:11,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:11,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:11,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:11,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:11,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:11,685 INFO L87 Difference]: Start difference. First operand 703 states and 1186 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:11,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:11,812 INFO L93 Difference]: Finished difference Result 2021 states and 3446 transitions. [2021-11-23 14:11:11,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:11,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 14:11:11,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:11,823 INFO L225 Difference]: With dead ends: 2021 [2021-11-23 14:11:11,823 INFO L226 Difference]: Without dead ends: 1356 [2021-11-23 14:11:11,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:11,830 INFO L933 BasicCegarLoop]: 1296 mSDtfsCounter, 822 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 2158 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:11,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 2158 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:11,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-11-23 14:11:11,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1093. [2021-11-23 14:11:11,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1091 states have (on average 1.7259395050412465) internal successors, (1883), 1092 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1883 transitions. [2021-11-23 14:11:11,939 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1883 transitions. Word has length 79 [2021-11-23 14:11:11,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:11,940 INFO L470 AbstractCegarLoop]: Abstraction has 1093 states and 1883 transitions. [2021-11-23 14:11:11,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:11,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1883 transitions. [2021-11-23 14:11:11,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 14:11:11,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:11,943 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, 1, 1, 1, 1, 1] [2021-11-23 14:11:11,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 14:11:11,944 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:11,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:11,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1228450760, now seen corresponding path program 1 times [2021-11-23 14:11:11,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:11,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131120193] [2021-11-23 14:11:11,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:11,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:12,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:12,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131120193] [2021-11-23 14:11:12,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131120193] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:11:12,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243670666] [2021-11-23 14:11:12,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:12,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:11:12,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:11:12,034 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:11:12,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 14:11:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:12,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 14:11:12,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:11:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:12,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:11:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:12,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243670666] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:11:12,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:11:12,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 14:11:12,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918760468] [2021-11-23 14:11:12,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:11:12,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 14:11:12,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:12,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 14:11:12,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:11:12,826 INFO L87 Difference]: Start difference. First operand 1093 states and 1883 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:13,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:13,219 INFO L93 Difference]: Finished difference Result 3793 states and 6511 transitions. [2021-11-23 14:11:13,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 14:11:13,220 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 14:11:13,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:13,245 INFO L225 Difference]: With dead ends: 3793 [2021-11-23 14:11:13,245 INFO L226 Difference]: Without dead ends: 3530 [2021-11-23 14:11:13,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:11:13,248 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 4103 mSDsluCounter, 3348 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4103 SdHoareTripleChecker+Valid, 4220 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:13,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4103 Valid, 4220 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:13,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3530 states. [2021-11-23 14:11:13,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3530 to 2741. [2021-11-23 14:11:13,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2741 states, 2739 states have (on average 1.7568455640744798) internal successors, (4812), 2740 states have internal predecessors, (4812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:13,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2741 states to 2741 states and 4812 transitions. [2021-11-23 14:11:13,513 INFO L78 Accepts]: Start accepts. Automaton has 2741 states and 4812 transitions. Word has length 79 [2021-11-23 14:11:13,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:13,513 INFO L470 AbstractCegarLoop]: Abstraction has 2741 states and 4812 transitions. [2021-11-23 14:11:13,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:13,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2741 states and 4812 transitions. [2021-11-23 14:11:13,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 14:11:13,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:13,520 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] [2021-11-23 14:11:13,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 14:11:13,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29bc9b22-16c0-4c4f-b7bc-9a642c431fd8/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:11:13,742 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:13,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:13,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1720182822, now seen corresponding path program 1 times [2021-11-23 14:11:13,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:13,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073028910] [2021-11-23 14:11:13,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:13,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:13,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:13,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073028910] [2021-11-23 14:11:13,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073028910] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:13,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:13,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:13,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525360121] [2021-11-23 14:11:13,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:13,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:13,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:13,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:13,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:13,805 INFO L87 Difference]: Start difference. First operand 2741 states and 4812 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:14,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:14,159 INFO L93 Difference]: Finished difference Result 7147 states and 12574 transitions. [2021-11-23 14:11:14,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:14,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-23 14:11:14,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:14,194 INFO L225 Difference]: With dead ends: 7147 [2021-11-23 14:11:14,194 INFO L226 Difference]: Without dead ends: 4606 [2021-11-23 14:11:14,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:14,199 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 820 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 1735 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:14,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 1735 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:14,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4606 states. [2021-11-23 14:11:14,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4606 to 4343. [2021-11-23 14:11:14,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4343 states, 4341 states have (on average 1.763418567150426) internal successors, (7655), 4342 states have internal predecessors, (7655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:14,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4343 states to 4343 states and 7655 transitions. [2021-11-23 14:11:14,504 INFO L78 Accepts]: Start accepts. Automaton has 4343 states and 7655 transitions. Word has length 82 [2021-11-23 14:11:14,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:14,505 INFO L470 AbstractCegarLoop]: Abstraction has 4343 states and 7655 transitions. [2021-11-23 14:11:14,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:14,505 INFO L276 IsEmpty]: Start isEmpty. Operand 4343 states and 7655 transitions. [2021-11-23 14:11:14,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 14:11:14,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:14,533 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] [2021-11-23 14:11:14,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 14:11:14,534 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:14,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:14,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1151078296, now seen corresponding path program 1 times [2021-11-23 14:11:14,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:14,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770497662] [2021-11-23 14:11:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:14,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:14,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:14,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770497662] [2021-11-23 14:11:14,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770497662] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:14,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:14,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:14,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422988279] [2021-11-23 14:11:14,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:14,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:14,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:14,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:14,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:14,606 INFO L87 Difference]: Start difference. First operand 4343 states and 7655 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:15,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:15,035 INFO L93 Difference]: Finished difference Result 10611 states and 18701 transitions. [2021-11-23 14:11:15,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:15,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-23 14:11:15,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:15,081 INFO L225 Difference]: With dead ends: 10611 [2021-11-23 14:11:15,082 INFO L226 Difference]: Without dead ends: 6835 [2021-11-23 14:11:15,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:15,089 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 818 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:15,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 1686 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:15,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6835 states. [2021-11-23 14:11:15,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6835 to 6572. [2021-11-23 14:11:15,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6572 states, 6570 states have (on average 1.762861491628615) internal successors, (11582), 6571 states have internal predecessors, (11582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:15,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6572 states to 6572 states and 11582 transitions. [2021-11-23 14:11:15,599 INFO L78 Accepts]: Start accepts. Automaton has 6572 states and 11582 transitions. Word has length 83 [2021-11-23 14:11:15,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:15,599 INFO L470 AbstractCegarLoop]: Abstraction has 6572 states and 11582 transitions. [2021-11-23 14:11:15,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:15,600 INFO L276 IsEmpty]: Start isEmpty. Operand 6572 states and 11582 transitions. [2021-11-23 14:11:15,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-23 14:11:15,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:15,611 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] [2021-11-23 14:11:15,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 14:11:15,611 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:15,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:15,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1698366732, now seen corresponding path program 1 times [2021-11-23 14:11:15,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:15,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010914893] [2021-11-23 14:11:15,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:15,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:15,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:15,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010914893] [2021-11-23 14:11:15,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010914893] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:15,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:15,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:15,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054744310] [2021-11-23 14:11:15,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:15,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:15,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:15,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:15,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:15,666 INFO L87 Difference]: Start difference. First operand 6572 states and 11582 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:16,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:16,274 INFO L93 Difference]: Finished difference Result 15699 states and 27654 transitions. [2021-11-23 14:11:16,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:16,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-23 14:11:16,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:16,309 INFO L225 Difference]: With dead ends: 15699 [2021-11-23 14:11:16,309 INFO L226 Difference]: Without dead ends: 10283 [2021-11-23 14:11:16,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:16,318 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 816 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:16,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [816 Valid, 1686 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:16,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10283 states. [2021-11-23 14:11:16,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10283 to 10020. [2021-11-23 14:11:16,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10020 states, 10018 states have (on average 1.7602315831503295) internal successors, (17634), 10019 states have internal predecessors, (17634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:17,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10020 states to 10020 states and 17634 transitions. [2021-11-23 14:11:17,032 INFO L78 Accepts]: Start accepts. Automaton has 10020 states and 17634 transitions. Word has length 84 [2021-11-23 14:11:17,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:17,032 INFO L470 AbstractCegarLoop]: Abstraction has 10020 states and 17634 transitions. [2021-11-23 14:11:17,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:17,033 INFO L276 IsEmpty]: Start isEmpty. Operand 10020 states and 17634 transitions. [2021-11-23 14:11:17,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 14:11:17,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:17,049 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] [2021-11-23 14:11:17,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 14:11:17,050 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:17,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:17,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1729646584, now seen corresponding path program 1 times [2021-11-23 14:11:17,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:17,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258667120] [2021-11-23 14:11:17,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:17,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:17,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:17,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258667120] [2021-11-23 14:11:17,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258667120] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:17,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:17,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:17,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624308155] [2021-11-23 14:11:17,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:17,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:17,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:17,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:17,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:17,106 INFO L87 Difference]: Start difference. First operand 10020 states and 17634 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:18,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:18,309 INFO L93 Difference]: Finished difference Result 25074 states and 44210 transitions. [2021-11-23 14:11:18,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:18,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-23 14:11:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:18,368 INFO L225 Difference]: With dead ends: 25074 [2021-11-23 14:11:18,368 INFO L226 Difference]: Without dead ends: 16758 [2021-11-23 14:11:18,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:18,384 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 814 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 1734 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:18,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 1734 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:18,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16758 states. [2021-11-23 14:11:19,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16758 to 16495. [2021-11-23 14:11:19,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16495 states, 16493 states have (on average 1.7613533014005942) internal successors, (29050), 16494 states have internal predecessors, (29050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:19,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16495 states to 16495 states and 29050 transitions. [2021-11-23 14:11:19,537 INFO L78 Accepts]: Start accepts. Automaton has 16495 states and 29050 transitions. Word has length 85 [2021-11-23 14:11:19,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:19,538 INFO L470 AbstractCegarLoop]: Abstraction has 16495 states and 29050 transitions. [2021-11-23 14:11:19,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:19,538 INFO L276 IsEmpty]: Start isEmpty. Operand 16495 states and 29050 transitions. [2021-11-23 14:11:19,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-23 14:11:19,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:19,559 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] [2021-11-23 14:11:19,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 14:11:19,560 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:19,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:19,561 INFO L85 PathProgramCache]: Analyzing trace with hash 405075324, now seen corresponding path program 1 times [2021-11-23 14:11:19,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:19,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621075165] [2021-11-23 14:11:19,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:19,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:19,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:19,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:19,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621075165] [2021-11-23 14:11:19,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621075165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:19,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:19,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:19,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115189336] [2021-11-23 14:11:19,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:19,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:19,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:19,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:19,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:19,626 INFO L87 Difference]: Start difference. First operand 16495 states and 29050 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:21,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:21,321 INFO L93 Difference]: Finished difference Result 42121 states and 74422 transitions. [2021-11-23 14:11:21,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:21,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-23 14:11:21,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:21,432 INFO L225 Difference]: With dead ends: 42121 [2021-11-23 14:11:21,433 INFO L226 Difference]: Without dead ends: 28220 [2021-11-23 14:11:21,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:21,462 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 812 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 1733 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:21,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [812 Valid, 1733 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:21,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28220 states. [2021-11-23 14:11:23,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28220 to 27957. [2021-11-23 14:11:23,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27957 states, 27955 states have (on average 1.7641566803791808) internal successors, (49317), 27956 states have internal predecessors, (49317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27957 states to 27957 states and 49317 transitions. [2021-11-23 14:11:23,230 INFO L78 Accepts]: Start accepts. Automaton has 27957 states and 49317 transitions. Word has length 86 [2021-11-23 14:11:23,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:23,231 INFO L470 AbstractCegarLoop]: Abstraction has 27957 states and 49317 transitions. [2021-11-23 14:11:23,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:23,231 INFO L276 IsEmpty]: Start isEmpty. Operand 27957 states and 49317 transitions. [2021-11-23 14:11:23,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-23 14:11:23,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:23,254 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] [2021-11-23 14:11:23,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 14:11:23,255 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:23,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:23,256 INFO L85 PathProgramCache]: Analyzing trace with hash 717630022, now seen corresponding path program 1 times [2021-11-23 14:11:23,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:23,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695018880] [2021-11-23 14:11:23,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:23,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:23,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:23,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695018880] [2021-11-23 14:11:23,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695018880] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:23,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:23,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:23,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573200493] [2021-11-23 14:11:23,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:23,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:23,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:23,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:23,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:23,311 INFO L87 Difference]: Start difference. First operand 27957 states and 49317 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:25,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:25,338 INFO L93 Difference]: Finished difference Result 74476 states and 131592 transitions. [2021-11-23 14:11:25,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:25,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-23 14:11:25,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:25,544 INFO L225 Difference]: With dead ends: 74476 [2021-11-23 14:11:25,545 INFO L226 Difference]: Without dead ends: 50075 [2021-11-23 14:11:25,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:25,602 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 810 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:25,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [810 Valid, 1742 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:25,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50075 states. [2021-11-23 14:11:28,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50075 to 49812. [2021-11-23 14:11:28,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49812 states, 49810 states have (on average 1.7627183296526803) internal successors, (87801), 49811 states have internal predecessors, (87801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:28,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49812 states to 49812 states and 87801 transitions. [2021-11-23 14:11:28,332 INFO L78 Accepts]: Start accepts. Automaton has 49812 states and 87801 transitions. Word has length 87 [2021-11-23 14:11:28,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:28,333 INFO L470 AbstractCegarLoop]: Abstraction has 49812 states and 87801 transitions. [2021-11-23 14:11:28,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:28,333 INFO L276 IsEmpty]: Start isEmpty. Operand 49812 states and 87801 transitions. [2021-11-23 14:11:28,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 14:11:28,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:28,365 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] [2021-11-23 14:11:28,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 14:11:28,365 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:28,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:28,366 INFO L85 PathProgramCache]: Analyzing trace with hash -304133840, now seen corresponding path program 1 times [2021-11-23 14:11:28,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:28,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648385789] [2021-11-23 14:11:28,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:28,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:28,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:28,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648385789] [2021-11-23 14:11:28,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648385789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:28,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:28,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:28,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999894547] [2021-11-23 14:11:28,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:28,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:28,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:28,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:28,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:28,418 INFO L87 Difference]: Start difference. First operand 49812 states and 87801 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:31,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:31,844 INFO L93 Difference]: Finished difference Result 127619 states and 224846 transitions. [2021-11-23 14:11:31,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:31,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-23 14:11:31,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:32,097 INFO L225 Difference]: With dead ends: 127619 [2021-11-23 14:11:32,098 INFO L226 Difference]: Without dead ends: 83701 [2021-11-23 14:11:32,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:32,147 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 808 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:32,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [808 Valid, 1686 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:32,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83701 states. [2021-11-23 14:11:35,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83701 to 83438. [2021-11-23 14:11:36,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83438 states, 83436 states have (on average 1.756244307013759) internal successors, (146534), 83437 states have internal predecessors, (146534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:36,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83438 states to 83438 states and 146534 transitions. [2021-11-23 14:11:36,325 INFO L78 Accepts]: Start accepts. Automaton has 83438 states and 146534 transitions. Word has length 88 [2021-11-23 14:11:36,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:36,326 INFO L470 AbstractCegarLoop]: Abstraction has 83438 states and 146534 transitions. [2021-11-23 14:11:36,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:36,326 INFO L276 IsEmpty]: Start isEmpty. Operand 83438 states and 146534 transitions. [2021-11-23 14:11:36,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 14:11:36,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:36,365 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] [2021-11-23 14:11:36,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 14:11:36,366 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:36,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:36,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1578599576, now seen corresponding path program 1 times [2021-11-23 14:11:36,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:36,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818687177] [2021-11-23 14:11:36,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:36,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:36,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:36,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818687177] [2021-11-23 14:11:36,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818687177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:36,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:36,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:36,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804003898] [2021-11-23 14:11:36,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:36,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:36,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:36,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:36,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:36,432 INFO L87 Difference]: Start difference. First operand 83438 states and 146534 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:42,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:42,198 INFO L93 Difference]: Finished difference Result 230011 states and 405113 transitions. [2021-11-23 14:11:42,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:42,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-23 14:11:42,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:42,751 INFO L225 Difference]: With dead ends: 230011 [2021-11-23 14:11:42,751 INFO L226 Difference]: Without dead ends: 154135 [2021-11-23 14:11:43,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:43,122 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 806 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 1733 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:43,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 1733 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:43,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154135 states. [2021-11-23 14:11:50,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154135 to 153872. [2021-11-23 14:11:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153872 states, 153870 states have (on average 1.7584714369272763) internal successors, (270576), 153871 states have internal predecessors, (270576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:50,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153872 states to 153872 states and 270576 transitions. [2021-11-23 14:11:50,828 INFO L78 Accepts]: Start accepts. Automaton has 153872 states and 270576 transitions. Word has length 89 [2021-11-23 14:11:50,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:50,829 INFO L470 AbstractCegarLoop]: Abstraction has 153872 states and 270576 transitions. [2021-11-23 14:11:50,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:50,829 INFO L276 IsEmpty]: Start isEmpty. Operand 153872 states and 270576 transitions. [2021-11-23 14:11:50,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 14:11:50,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:50,863 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] [2021-11-23 14:11:50,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 14:11:50,864 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:50,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:50,864 INFO L85 PathProgramCache]: Analyzing trace with hash -941286624, now seen corresponding path program 1 times [2021-11-23 14:11:50,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:50,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96402105] [2021-11-23 14:11:50,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:50,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:50,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:50,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96402105] [2021-11-23 14:11:50,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96402105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:50,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:50,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:50,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974674619] [2021-11-23 14:11:50,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:50,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:50,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:50,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:50,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:50,919 INFO L87 Difference]: Start difference. First operand 153872 states and 270576 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)