./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.4.ufo.UNBOUNDED.pals.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_c4e5b96e-dbb9-4fc6-acd9-5d802c6e6b42/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e5b96e-dbb9-4fc6-acd9-5d802c6e6b42/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_c4e5b96e-dbb9-4fc6-acd9-5d802c6e6b42/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e5b96e-dbb9-4fc6-acd9-5d802c6e6b42/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e5b96e-dbb9-4fc6-acd9-5d802c6e6b42/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_c4e5b96e-dbb9-4fc6-acd9-5d802c6e6b42/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 f29c97960939e53f55e46ebed0dba8de02c44a30d845c26a8268aafa8af6f244 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:53:35,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:53:35,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:53:35,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:53:35,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:53:35,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:53:35,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:53:35,079 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:53:35,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:53:35,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:53:35,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:53:35,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:53:35,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:53:35,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:53:35,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:53:35,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:53:35,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:53:35,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:53:35,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:53:35,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:53:35,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:53:35,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:53:35,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:53:35,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:53:35,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:53:35,109 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:53:35,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:53:35,111 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:53:35,111 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:53:35,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:53:35,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:53:35,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:53:35,115 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:53:35,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:53:35,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:53:35,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:53:35,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:53:35,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:53:35,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:53:35,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:53:35,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:53:35,123 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e5b96e-dbb9-4fc6-acd9-5d802c6e6b42/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:53:35,147 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:53:35,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:53:35,148 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:53:35,149 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:53:35,150 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:53:35,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:53:35,151 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:53:35,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:53:35,152 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:53:35,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:53:35,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:53:35,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:53:35,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:53:35,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:53:35,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:53:35,154 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:53:35,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:53:35,155 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:53:35,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:53:35,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:53:35,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:53:35,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:53:35,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:53:35,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:53:35,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:53:35,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:53:35,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:53:35,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:53:35,159 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:53:35,159 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:53:35,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:53:35,159 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:53:35,160 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_c4e5b96e-dbb9-4fc6-acd9-5d802c6e6b42/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e5b96e-dbb9-4fc6-acd9-5d802c6e6b42/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f29c97960939e53f55e46ebed0dba8de02c44a30d845c26a8268aafa8af6f244 [2021-11-23 13:53:35,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:53:35,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:53:35,419 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:53:35,420 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:53:35,422 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:53:35,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e5b96e-dbb9-4fc6-acd9-5d802c6e6b42/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c [2021-11-23 13:53:35,488 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e5b96e-dbb9-4fc6-acd9-5d802c6e6b42/bin/uautomizer-wIGwrQj20G/data/baa1143a4/c1a48065b0f44e259572517d9599f5fd/FLAG436d015c6 [2021-11-23 13:53:36,008 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:53:36,008 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e5b96e-dbb9-4fc6-acd9-5d802c6e6b42/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c [2021-11-23 13:53:36,018 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e5b96e-dbb9-4fc6-acd9-5d802c6e6b42/bin/uautomizer-wIGwrQj20G/data/baa1143a4/c1a48065b0f44e259572517d9599f5fd/FLAG436d015c6 [2021-11-23 13:53:36,363 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e5b96e-dbb9-4fc6-acd9-5d802c6e6b42/bin/uautomizer-wIGwrQj20G/data/baa1143a4/c1a48065b0f44e259572517d9599f5fd [2021-11-23 13:53:36,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:53:36,370 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:53:36,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:53:36,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:53:36,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:53:36,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:53:36" (1/1) ... [2021-11-23 13:53:36,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b20139e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:36, skipping insertion in model container [2021-11-23 13:53:36,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:53:36" (1/1) ... [2021-11-23 13:53:36,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:53:36,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:53:36,658 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_c4e5b96e-dbb9-4fc6-acd9-5d802c6e6b42/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c[12968,12981] [2021-11-23 13:53:36,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:53:36,669 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:53:36,734 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_c4e5b96e-dbb9-4fc6-acd9-5d802c6e6b42/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c[12968,12981] [2021-11-23 13:53:36,734 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:53:36,749 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:53:36,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:36 WrapperNode [2021-11-23 13:53:36,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:53:36,751 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:53:36,751 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:53:36,751 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:53:36,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:36" (1/1) ... [2021-11-23 13:53:36,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:36" (1/1) ... [2021-11-23 13:53:36,802 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 443 [2021-11-23 13:53:36,803 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:53:36,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:53:36,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:53:36,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:53:36,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:36" (1/1) ... [2021-11-23 13:53:36,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:36" (1/1) ... [2021-11-23 13:53:36,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:36" (1/1) ... [2021-11-23 13:53:36,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:36" (1/1) ... [2021-11-23 13:53:36,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:36" (1/1) ... [2021-11-23 13:53:36,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:36" (1/1) ... [2021-11-23 13:53:36,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:36" (1/1) ... [2021-11-23 13:53:36,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:53:36,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:53:36,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:53:36,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:53:36,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:36" (1/1) ... [2021-11-23 13:53:36,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:53:36,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e5b96e-dbb9-4fc6-acd9-5d802c6e6b42/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:53:36,902 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e5b96e-dbb9-4fc6-acd9-5d802c6e6b42/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:53:36,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e5b96e-dbb9-4fc6-acd9-5d802c6e6b42/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:53:36,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:53:36,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:53:36,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:53:36,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:53:37,070 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:53:37,071 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:53:37,647 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:53:37,656 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:53:37,657 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 13:53:37,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:53:37 BoogieIcfgContainer [2021-11-23 13:53:37,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:53:37,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:53:37,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:53:37,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:53:37,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:53:36" (1/3) ... [2021-11-23 13:53:37,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f09e7ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:53:37, skipping insertion in model container [2021-11-23 13:53:37,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:36" (2/3) ... [2021-11-23 13:53:37,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f09e7ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:53:37, skipping insertion in model container [2021-11-23 13:53:37,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:53:37" (3/3) ... [2021-11-23 13:53:37,694 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.UNBOUNDED.pals.c [2021-11-23 13:53:37,699 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:53:37,699 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 13:53:37,765 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:53:37,772 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 13:53:37,772 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 13:53:37,791 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 135 states have (on average 1.7481481481481482) internal successors, (236), 136 states have internal predecessors, (236), 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 13:53:37,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 13:53:37,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:37,800 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] [2021-11-23 13:53:37,801 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:37,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:37,807 INFO L85 PathProgramCache]: Analyzing trace with hash 298975739, now seen corresponding path program 1 times [2021-11-23 13:53:37,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:37,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951156344] [2021-11-23 13:53:37,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:37,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:38,015 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 13:53:38,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:38,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951156344] [2021-11-23 13:53:38,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951156344] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:53:38,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:53:38,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:53:38,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391582496] [2021-11-23 13:53:38,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:53:38,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 13:53:38,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:53:38,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 13:53:38,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:53:38,051 INFO L87 Difference]: Start difference. First operand has 137 states, 135 states have (on average 1.7481481481481482) internal successors, (236), 136 states have internal predecessors, (236), 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 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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 13:53:38,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:38,082 INFO L93 Difference]: Finished difference Result 214 states and 367 transitions. [2021-11-23 13:53:38,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 13:53:38,084 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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 37 [2021-11-23 13:53:38,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:38,095 INFO L225 Difference]: With dead ends: 214 [2021-11-23 13:53:38,095 INFO L226 Difference]: Without dead ends: 133 [2021-11-23 13:53:38,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:53:38,102 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:38,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:53:38,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-23 13:53:38,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-11-23 13:53:38,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.7348484848484849) internal successors, (229), 132 states have internal predecessors, (229), 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 13:53:38,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 229 transitions. [2021-11-23 13:53:38,145 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 229 transitions. Word has length 37 [2021-11-23 13:53:38,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:53:38,146 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 229 transitions. [2021-11-23 13:53:38,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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 13:53:38,146 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 229 transitions. [2021-11-23 13:53:38,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 13:53:38,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:38,149 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] [2021-11-23 13:53:38,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:53:38,149 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:38,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:38,150 INFO L85 PathProgramCache]: Analyzing trace with hash -518672711, now seen corresponding path program 1 times [2021-11-23 13:53:38,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:38,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173939675] [2021-11-23 13:53:38,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:38,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:38,327 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 13:53:38,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:38,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173939675] [2021-11-23 13:53:38,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173939675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:53:38,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:53:38,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:53:38,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309636737] [2021-11-23 13:53:38,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:53:38,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:53:38,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:53:38,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:53:38,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:53:38,336 INFO L87 Difference]: Start difference. First operand 133 states and 229 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 13:53:38,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:38,452 INFO L93 Difference]: Finished difference Result 213 states and 360 transitions. [2021-11-23 13:53:38,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:53:38,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 37 [2021-11-23 13:53:38,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:38,456 INFO L225 Difference]: With dead ends: 213 [2021-11-23 13:53:38,458 INFO L226 Difference]: Without dead ends: 133 [2021-11-23 13:53:38,459 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 13:53:38,462 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 3 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:38,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 878 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:53:38,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-23 13:53:38,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-11-23 13:53:38,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.5303030303030303) internal successors, (202), 132 states have internal predecessors, (202), 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 13:53:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 202 transitions. [2021-11-23 13:53:38,483 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 202 transitions. Word has length 37 [2021-11-23 13:53:38,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:53:38,485 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 202 transitions. [2021-11-23 13:53:38,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 13:53:38,485 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 202 transitions. [2021-11-23 13:53:38,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 13:53:38,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:38,494 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 13:53:38,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:53:38,494 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:38,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:38,495 INFO L85 PathProgramCache]: Analyzing trace with hash -707453694, now seen corresponding path program 1 times [2021-11-23 13:53:38,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:38,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946088715] [2021-11-23 13:53:38,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:38,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:38,613 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 13:53:38,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:38,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946088715] [2021-11-23 13:53:38,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946088715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:53:38,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:53:38,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:53:38,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134514744] [2021-11-23 13:53:38,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:53:38,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:53:38,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:53:38,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:53:38,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:53:38,617 INFO L87 Difference]: Start difference. First operand 133 states and 202 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 13:53:38,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:38,677 INFO L93 Difference]: Finished difference Result 270 states and 429 transitions. [2021-11-23 13:53:38,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:53:38,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 13:53:38,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:38,704 INFO L225 Difference]: With dead ends: 270 [2021-11-23 13:53:38,704 INFO L226 Difference]: Without dead ends: 194 [2021-11-23 13:53:38,704 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 13:53:38,705 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 101 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:38,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 345 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:53:38,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-23 13:53:38,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2021-11-23 13:53:38,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.5473684210526315) internal successors, (294), 190 states have internal predecessors, (294), 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 13:53:38,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 294 transitions. [2021-11-23 13:53:38,727 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 294 transitions. Word has length 63 [2021-11-23 13:53:38,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:53:38,728 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 294 transitions. [2021-11-23 13:53:38,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 13:53:38,728 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 294 transitions. [2021-11-23 13:53:38,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 13:53:38,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:38,729 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:53:38,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 13:53:38,730 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:38,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:38,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1995563601, now seen corresponding path program 1 times [2021-11-23 13:53:38,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:38,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184863872] [2021-11-23 13:53:38,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:38,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:38,861 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 13:53:38,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:38,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184863872] [2021-11-23 13:53:38,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184863872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:53:38,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:53:38,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:53:38,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006390133] [2021-11-23 13:53:38,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:53:38,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:53:38,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:53:38,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:53:38,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:53:38,866 INFO L87 Difference]: Start difference. First operand 191 states and 294 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 13:53:38,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:38,901 INFO L93 Difference]: Finished difference Result 445 states and 706 transitions. [2021-11-23 13:53:38,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:53:38,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2021-11-23 13:53:38,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:38,908 INFO L225 Difference]: With dead ends: 445 [2021-11-23 13:53:38,908 INFO L226 Difference]: Without dead ends: 311 [2021-11-23 13:53:38,911 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 13:53:38,920 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 103 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:38,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 368 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:53:38,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-23 13:53:38,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 307. [2021-11-23 13:53:38,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.5686274509803921) internal successors, (480), 306 states have internal predecessors, (480), 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 13:53:38,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 480 transitions. [2021-11-23 13:53:38,965 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 480 transitions. Word has length 65 [2021-11-23 13:53:38,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:53:38,966 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 480 transitions. [2021-11-23 13:53:38,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 13:53:38,968 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 480 transitions. [2021-11-23 13:53:38,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 13:53:38,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:38,970 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 13:53:38,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 13:53:38,971 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:38,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:38,973 INFO L85 PathProgramCache]: Analyzing trace with hash -2137075392, now seen corresponding path program 1 times [2021-11-23 13:53:38,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:38,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031099028] [2021-11-23 13:53:38,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:38,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:39,083 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 13:53:39,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:39,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031099028] [2021-11-23 13:53:39,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031099028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:53:39,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:53:39,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:53:39,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059589033] [2021-11-23 13:53:39,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:53:39,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:53:39,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:53:39,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:53:39,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:53:39,086 INFO L87 Difference]: Start difference. First operand 307 states and 480 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 13:53:39,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:39,129 INFO L93 Difference]: Finished difference Result 779 states and 1238 transitions. [2021-11-23 13:53:39,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:53:39,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 13:53:39,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:39,134 INFO L225 Difference]: With dead ends: 779 [2021-11-23 13:53:39,134 INFO L226 Difference]: Without dead ends: 529 [2021-11-23 13:53:39,135 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 13:53:39,136 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 97 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:39,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 369 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:53:39,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-11-23 13:53:39,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 523. [2021-11-23 13:53:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.5708812260536398) internal successors, (820), 522 states have internal predecessors, (820), 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 13:53:39,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 820 transitions. [2021-11-23 13:53:39,164 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 820 transitions. Word has length 67 [2021-11-23 13:53:39,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:53:39,165 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 820 transitions. [2021-11-23 13:53:39,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 13:53:39,165 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 820 transitions. [2021-11-23 13:53:39,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 13:53:39,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:39,167 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] [2021-11-23 13:53:39,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 13:53:39,167 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:39,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:39,168 INFO L85 PathProgramCache]: Analyzing trace with hash -544230961, now seen corresponding path program 1 times [2021-11-23 13:53:39,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:39,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604460856] [2021-11-23 13:53:39,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:39,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:39,276 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 13:53:39,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:39,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604460856] [2021-11-23 13:53:39,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604460856] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:53:39,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:53:39,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:53:39,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438273331] [2021-11-23 13:53:39,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:53:39,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:53:39,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:53:39,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:53:39,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:53:39,281 INFO L87 Difference]: Start difference. First operand 523 states and 820 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 13:53:39,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:39,500 INFO L93 Difference]: Finished difference Result 2639 states and 4230 transitions. [2021-11-23 13:53:39,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:53:39,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 69 [2021-11-23 13:53:39,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:39,514 INFO L225 Difference]: With dead ends: 2639 [2021-11-23 13:53:39,515 INFO L226 Difference]: Without dead ends: 2173 [2021-11-23 13:53:39,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:53:39,518 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 861 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:39,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 1129 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:53:39,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2173 states. [2021-11-23 13:53:39,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2173 to 971. [2021-11-23 13:53:39,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.579381443298969) internal successors, (1532), 970 states have internal predecessors, (1532), 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 13:53:39,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1532 transitions. [2021-11-23 13:53:39,588 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1532 transitions. Word has length 69 [2021-11-23 13:53:39,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:53:39,589 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1532 transitions. [2021-11-23 13:53:39,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 13:53:39,589 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1532 transitions. [2021-11-23 13:53:39,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 13:53:39,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:39,591 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] [2021-11-23 13:53:39,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 13:53:39,591 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:39,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:39,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1614123231, now seen corresponding path program 1 times [2021-11-23 13:53:39,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:39,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742741822] [2021-11-23 13:53:39,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:39,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:39,686 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 13:53:39,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:39,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742741822] [2021-11-23 13:53:39,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742741822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:53:39,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:53:39,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:53:39,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108280875] [2021-11-23 13:53:39,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:53:39,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:53:39,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:53:39,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:53:39,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:53:39,690 INFO L87 Difference]: Start difference. First operand 971 states and 1532 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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 13:53:39,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:39,812 INFO L93 Difference]: Finished difference Result 3521 states and 5605 transitions. [2021-11-23 13:53:39,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:53:39,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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 70 [2021-11-23 13:53:39,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:39,827 INFO L225 Difference]: With dead ends: 3521 [2021-11-23 13:53:39,828 INFO L226 Difference]: Without dead ends: 2607 [2021-11-23 13:53:39,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:53:39,831 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 365 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:39,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 660 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:53:39,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-11-23 13:53:39,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1780. [2021-11-23 13:53:39,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 1.5801011804384486) internal successors, (2811), 1779 states have internal predecessors, (2811), 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 13:53:39,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 2811 transitions. [2021-11-23 13:53:39,931 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 2811 transitions. Word has length 70 [2021-11-23 13:53:39,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:53:39,932 INFO L470 AbstractCegarLoop]: Abstraction has 1780 states and 2811 transitions. [2021-11-23 13:53:39,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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 13:53:39,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 2811 transitions. [2021-11-23 13:53:39,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 13:53:39,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:39,934 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] [2021-11-23 13:53:39,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 13:53:39,935 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:39,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:39,936 INFO L85 PathProgramCache]: Analyzing trace with hash -252040890, now seen corresponding path program 1 times [2021-11-23 13:53:39,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:39,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908800981] [2021-11-23 13:53:39,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:39,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:39,999 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 13:53:39,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:40,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908800981] [2021-11-23 13:53:40,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908800981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:53:40,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:53:40,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:53:40,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382479155] [2021-11-23 13:53:40,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:53:40,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:53:40,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:53:40,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:53:40,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:53:40,003 INFO L87 Difference]: Start difference. First operand 1780 states and 2811 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 13:53:40,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:40,157 INFO L93 Difference]: Finished difference Result 5229 states and 8331 transitions. [2021-11-23 13:53:40,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:53:40,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 71 [2021-11-23 13:53:40,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:40,178 INFO L225 Difference]: With dead ends: 5229 [2021-11-23 13:53:40,178 INFO L226 Difference]: Without dead ends: 3506 [2021-11-23 13:53:40,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:53:40,183 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 363 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:40,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 661 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:53:40,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3506 states. [2021-11-23 13:53:40,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3506 to 2627. [2021-11-23 13:53:40,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 1.578827113480579) internal successors, (4146), 2626 states have internal predecessors, (4146), 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 13:53:40,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 4146 transitions. [2021-11-23 13:53:40,347 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 4146 transitions. Word has length 71 [2021-11-23 13:53:40,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:53:40,350 INFO L470 AbstractCegarLoop]: Abstraction has 2627 states and 4146 transitions. [2021-11-23 13:53:40,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 13:53:40,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 4146 transitions. [2021-11-23 13:53:40,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 13:53:40,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:40,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:53:40,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 13:53:40,354 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:40,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:40,359 INFO L85 PathProgramCache]: Analyzing trace with hash -630566449, now seen corresponding path program 1 times [2021-11-23 13:53:40,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:40,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136231443] [2021-11-23 13:53:40,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:40,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:40,451 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 13:53:40,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:40,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136231443] [2021-11-23 13:53:40,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136231443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:53:40,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:53:40,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:53:40,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860371273] [2021-11-23 13:53:40,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:53:40,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:53:40,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:53:40,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:53:40,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:53:40,454 INFO L87 Difference]: Start difference. First operand 2627 states and 4146 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 13:53:40,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:40,584 INFO L93 Difference]: Finished difference Result 5332 states and 8434 transitions. [2021-11-23 13:53:40,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:53:40,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 72 [2021-11-23 13:53:40,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:40,606 INFO L225 Difference]: With dead ends: 5332 [2021-11-23 13:53:40,606 INFO L226 Difference]: Without dead ends: 3834 [2021-11-23 13:53:40,609 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 13:53:40,609 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 96 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:40,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 415 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:53:40,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2021-11-23 13:53:40,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 3832. [2021-11-23 13:53:40,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3832 states, 3831 states have (on average 1.565126598799269) internal successors, (5996), 3831 states have internal predecessors, (5996), 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 13:53:40,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3832 states to 3832 states and 5996 transitions. [2021-11-23 13:53:40,797 INFO L78 Accepts]: Start accepts. Automaton has 3832 states and 5996 transitions. Word has length 72 [2021-11-23 13:53:40,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:53:40,797 INFO L470 AbstractCegarLoop]: Abstraction has 3832 states and 5996 transitions. [2021-11-23 13:53:40,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 13:53:40,798 INFO L276 IsEmpty]: Start isEmpty. Operand 3832 states and 5996 transitions. [2021-11-23 13:53:40,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 13:53:40,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:40,799 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:53:40,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 13:53:40,800 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:40,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:40,800 INFO L85 PathProgramCache]: Analyzing trace with hash -808156936, now seen corresponding path program 1 times [2021-11-23 13:53:40,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:40,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198136456] [2021-11-23 13:53:40,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:40,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:40,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:40,844 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 13:53:40,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:40,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198136456] [2021-11-23 13:53:40,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198136456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:53:40,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:53:40,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:53:40,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202551643] [2021-11-23 13:53:40,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:53:40,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:53:40,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:53:40,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:53:40,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:53:40,846 INFO L87 Difference]: Start difference. First operand 3832 states and 5996 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 13:53:41,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:41,123 INFO L93 Difference]: Finished difference Result 11784 states and 18557 transitions. [2021-11-23 13:53:41,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:53:41,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 72 [2021-11-23 13:53:41,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:41,168 INFO L225 Difference]: With dead ends: 11784 [2021-11-23 13:53:41,168 INFO L226 Difference]: Without dead ends: 8140 [2021-11-23 13:53:41,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:53:41,175 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 361 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:41,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 661 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:53:41,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8140 states. [2021-11-23 13:53:41,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8140 to 5964. [2021-11-23 13:53:41,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5964 states, 5963 states have (on average 1.5609592487003185) internal successors, (9308), 5963 states have internal predecessors, (9308), 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 13:53:41,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5964 states to 5964 states and 9308 transitions. [2021-11-23 13:53:41,544 INFO L78 Accepts]: Start accepts. Automaton has 5964 states and 9308 transitions. Word has length 72 [2021-11-23 13:53:41,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:53:41,545 INFO L470 AbstractCegarLoop]: Abstraction has 5964 states and 9308 transitions. [2021-11-23 13:53:41,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 13:53:41,545 INFO L276 IsEmpty]: Start isEmpty. Operand 5964 states and 9308 transitions. [2021-11-23 13:53:41,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 13:53:41,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:41,547 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:53:41,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 13:53:41,547 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:41,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:41,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1968035874, now seen corresponding path program 1 times [2021-11-23 13:53:41,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:41,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697871775] [2021-11-23 13:53:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:41,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:41,605 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 13:53:41,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:41,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697871775] [2021-11-23 13:53:41,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697871775] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:53:41,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:53:41,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:53:41,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370331284] [2021-11-23 13:53:41,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:53:41,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:53:41,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:53:41,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:53:41,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:53:41,608 INFO L87 Difference]: Start difference. First operand 5964 states and 9308 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 13:53:41,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:41,922 INFO L93 Difference]: Finished difference Result 13002 states and 20346 transitions. [2021-11-23 13:53:41,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:53:41,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 72 [2021-11-23 13:53:41,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:41,970 INFO L225 Difference]: With dead ends: 13002 [2021-11-23 13:53:41,970 INFO L226 Difference]: Without dead ends: 8809 [2021-11-23 13:53:41,975 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 13:53:41,976 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 102 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:41,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 443 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:53:41,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8809 states. [2021-11-23 13:53:42,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8809 to 8807. [2021-11-23 13:53:42,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8807 states, 8806 states have (on average 1.5470133999545763) internal successors, (13623), 8806 states have internal predecessors, (13623), 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 13:53:42,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8807 states to 8807 states and 13623 transitions. [2021-11-23 13:53:42,441 INFO L78 Accepts]: Start accepts. Automaton has 8807 states and 13623 transitions. Word has length 72 [2021-11-23 13:53:42,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:53:42,441 INFO L470 AbstractCegarLoop]: Abstraction has 8807 states and 13623 transitions. [2021-11-23 13:53:42,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 13:53:42,442 INFO L276 IsEmpty]: Start isEmpty. Operand 8807 states and 13623 transitions. [2021-11-23 13:53:42,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 13:53:42,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:42,443 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:53:42,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 13:53:42,443 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:42,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:42,444 INFO L85 PathProgramCache]: Analyzing trace with hash 952039085, now seen corresponding path program 1 times [2021-11-23 13:53:42,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:42,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188529519] [2021-11-23 13:53:42,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:42,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:42,476 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 13:53:42,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:42,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188529519] [2021-11-23 13:53:42,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188529519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:53:42,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:53:42,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:53:42,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087218705] [2021-11-23 13:53:42,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:53:42,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:53:42,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:53:42,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:53:42,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:53:42,478 INFO L87 Difference]: Start difference. First operand 8807 states and 13623 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 13:53:42,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:42,868 INFO L93 Difference]: Finished difference Result 21113 states and 32828 transitions. [2021-11-23 13:53:42,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:53:42,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 72 [2021-11-23 13:53:42,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:42,894 INFO L225 Difference]: With dead ends: 21113 [2021-11-23 13:53:42,894 INFO L226 Difference]: Without dead ends: 12385 [2021-11-23 13:53:42,904 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 13:53:42,905 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 108 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:42,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 464 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:53:42,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12385 states. [2021-11-23 13:53:43,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12385 to 12383. [2021-11-23 13:53:43,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12383 states, 12382 states have (on average 1.5520917460830237) internal successors, (19218), 12382 states have internal predecessors, (19218), 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 13:53:43,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12383 states to 12383 states and 19218 transitions. [2021-11-23 13:53:43,461 INFO L78 Accepts]: Start accepts. Automaton has 12383 states and 19218 transitions. Word has length 72 [2021-11-23 13:53:43,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:53:43,461 INFO L470 AbstractCegarLoop]: Abstraction has 12383 states and 19218 transitions. [2021-11-23 13:53:43,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 13:53:43,462 INFO L276 IsEmpty]: Start isEmpty. Operand 12383 states and 19218 transitions. [2021-11-23 13:53:43,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 13:53:43,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:43,463 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] [2021-11-23 13:53:43,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 13:53:43,464 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:43,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:43,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1377255792, now seen corresponding path program 1 times [2021-11-23 13:53:43,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:43,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780642594] [2021-11-23 13:53:43,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:43,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:43,561 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 13:53:43,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:43,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780642594] [2021-11-23 13:53:43,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780642594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:53:43,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:53:43,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:53:43,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349787498] [2021-11-23 13:53:43,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:53:43,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:53:43,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:53:43,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:53:43,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:53:43,563 INFO L87 Difference]: Start difference. First operand 12383 states and 19218 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 13:53:44,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:44,165 INFO L93 Difference]: Finished difference Result 24689 states and 38332 transitions. [2021-11-23 13:53:44,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:53:44,166 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 74 [2021-11-23 13:53:44,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:44,194 INFO L225 Difference]: With dead ends: 24689 [2021-11-23 13:53:44,195 INFO L226 Difference]: Without dead ends: 12385 [2021-11-23 13:53:44,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:53:44,213 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 362 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:44,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 544 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:53:44,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12385 states. [2021-11-23 13:53:44,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12385 to 12383. [2021-11-23 13:53:44,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12383 states, 12382 states have (on average 1.5399773865288322) internal successors, (19068), 12382 states have internal predecessors, (19068), 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 13:53:44,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12383 states to 12383 states and 19068 transitions. [2021-11-23 13:53:44,816 INFO L78 Accepts]: Start accepts. Automaton has 12383 states and 19068 transitions. Word has length 74 [2021-11-23 13:53:44,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:53:44,817 INFO L470 AbstractCegarLoop]: Abstraction has 12383 states and 19068 transitions. [2021-11-23 13:53:44,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 13:53:44,817 INFO L276 IsEmpty]: Start isEmpty. Operand 12383 states and 19068 transitions. [2021-11-23 13:53:44,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 13:53:44,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:44,818 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] [2021-11-23 13:53:44,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 13:53:44,819 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:44,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:44,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1698241801, now seen corresponding path program 1 times [2021-11-23 13:53:44,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:44,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903757164] [2021-11-23 13:53:44,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:44,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:44,952 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 13:53:44,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:44,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903757164] [2021-11-23 13:53:44,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903757164] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:53:44,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:53:44,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:53:44,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364617694] [2021-11-23 13:53:44,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:53:44,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:53:44,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:53:44,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:53:44,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:53:44,955 INFO L87 Difference]: Start difference. First operand 12383 states and 19068 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 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 13:53:45,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:45,813 INFO L93 Difference]: Finished difference Result 35726 states and 55162 transitions. [2021-11-23 13:53:45,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:53:45,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 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 13:53:45,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:45,864 INFO L225 Difference]: With dead ends: 35726 [2021-11-23 13:53:45,864 INFO L226 Difference]: Without dead ends: 23422 [2021-11-23 13:53:45,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:53:45,882 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 261 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:45,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 546 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:53:45,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23422 states. [2021-11-23 13:53:46,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23422 to 23420. [2021-11-23 13:53:46,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23420 states, 23419 states have (on average 1.5279900935138135) internal successors, (35784), 23419 states have internal predecessors, (35784), 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 13:53:46,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23420 states to 23420 states and 35784 transitions. [2021-11-23 13:53:46,860 INFO L78 Accepts]: Start accepts. Automaton has 23420 states and 35784 transitions. Word has length 77 [2021-11-23 13:53:46,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:53:46,861 INFO L470 AbstractCegarLoop]: Abstraction has 23420 states and 35784 transitions. [2021-11-23 13:53:46,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 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 13:53:46,861 INFO L276 IsEmpty]: Start isEmpty. Operand 23420 states and 35784 transitions. [2021-11-23 13:53:46,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 13:53:46,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:46,862 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] [2021-11-23 13:53:46,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 13:53:46,862 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:46,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:46,863 INFO L85 PathProgramCache]: Analyzing trace with hash 677312633, now seen corresponding path program 1 times [2021-11-23 13:53:46,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:46,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88807928] [2021-11-23 13:53:46,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:46,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:46,960 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 13:53:46,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:46,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88807928] [2021-11-23 13:53:46,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88807928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:53:46,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:53:46,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 13:53:46,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710593808] [2021-11-23 13:53:46,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:53:46,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 13:53:46,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:53:46,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 13:53:46,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:53:46,963 INFO L87 Difference]: Start difference. First operand 23420 states and 35784 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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 13:53:48,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:48,369 INFO L93 Difference]: Finished difference Result 47517 states and 71955 transitions. [2021-11-23 13:53:48,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 13:53:48,370 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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 13:53:48,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:48,458 INFO L225 Difference]: With dead ends: 47517 [2021-11-23 13:53:48,458 INFO L226 Difference]: Without dead ends: 47515 [2021-11-23 13:53:48,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-23 13:53:48,470 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 917 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:48,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [917 Valid, 1064 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:53:48,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47515 states. [2021-11-23 13:53:49,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47515 to 24581. [2021-11-23 13:53:49,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24581 states, 24580 states have (on average 1.5026851098454028) internal successors, (36936), 24580 states have internal predecessors, (36936), 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 13:53:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24581 states to 24581 states and 36936 transitions. [2021-11-23 13:53:49,649 INFO L78 Accepts]: Start accepts. Automaton has 24581 states and 36936 transitions. Word has length 78 [2021-11-23 13:53:49,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:53:49,649 INFO L470 AbstractCegarLoop]: Abstraction has 24581 states and 36936 transitions. [2021-11-23 13:53:49,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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 13:53:49,650 INFO L276 IsEmpty]: Start isEmpty. Operand 24581 states and 36936 transitions. [2021-11-23 13:53:49,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 13:53:49,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:49,653 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:53:49,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 13:53:49,653 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:49,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:49,654 INFO L85 PathProgramCache]: Analyzing trace with hash -931565963, now seen corresponding path program 1 times [2021-11-23 13:53:49,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:49,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048384009] [2021-11-23 13:53:49,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:49,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:49,726 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 13:53:49,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:49,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048384009] [2021-11-23 13:53:49,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048384009] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:53:49,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:53:49,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:53:49,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279667093] [2021-11-23 13:53:49,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:53:49,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:53:49,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:53:49,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:53:49,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:53:49,731 INFO L87 Difference]: Start difference. First operand 24581 states and 36936 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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 13:53:51,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:51,461 INFO L93 Difference]: Finished difference Result 61381 states and 92529 transitions. [2021-11-23 13:53:51,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:53:51,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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 105 [2021-11-23 13:53:51,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:51,545 INFO L225 Difference]: With dead ends: 61381 [2021-11-23 13:53:51,545 INFO L226 Difference]: Without dead ends: 50043 [2021-11-23 13:53:51,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:53:51,569 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 460 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:51,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 902 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:53:51,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50043 states. [2021-11-23 13:53:52,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50043 to 38581. [2021-11-23 13:53:52,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38581 states, 38580 states have (on average 1.4995075168481078) internal successors, (57851), 38580 states have internal predecessors, (57851), 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 13:53:53,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38581 states to 38581 states and 57851 transitions. [2021-11-23 13:53:53,031 INFO L78 Accepts]: Start accepts. Automaton has 38581 states and 57851 transitions. Word has length 105 [2021-11-23 13:53:53,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:53:53,032 INFO L470 AbstractCegarLoop]: Abstraction has 38581 states and 57851 transitions. [2021-11-23 13:53:53,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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 13:53:53,032 INFO L276 IsEmpty]: Start isEmpty. Operand 38581 states and 57851 transitions. [2021-11-23 13:53:53,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 13:53:53,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:53,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:53:53,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 13:53:53,035 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:53,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:53,036 INFO L85 PathProgramCache]: Analyzing trace with hash 2025931908, now seen corresponding path program 1 times [2021-11-23 13:53:53,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:53,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946983813] [2021-11-23 13:53:53,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:53,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 13:53:53,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:53,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946983813] [2021-11-23 13:53:53,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946983813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:53:53,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:53:53,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:53:53,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620859066] [2021-11-23 13:53:53,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:53:53,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:53:53,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:53:53,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:53:53,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:53:53,104 INFO L87 Difference]: Start difference. First operand 38581 states and 57851 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 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 13:53:55,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:55,040 INFO L93 Difference]: Finished difference Result 65925 states and 99425 transitions. [2021-11-23 13:53:55,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:53:55,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 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 105 [2021-11-23 13:53:55,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:55,135 INFO L225 Difference]: With dead ends: 65925 [2021-11-23 13:53:55,136 INFO L226 Difference]: Without dead ends: 54587 [2021-11-23 13:53:55,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:53:55,160 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 454 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:55,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 966 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:53:55,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54587 states. [2021-11-23 13:53:57,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54587 to 52301. [2021-11-23 13:53:57,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52301 states, 52300 states have (on average 1.5009751434034417) internal successors, (78501), 52300 states have internal predecessors, (78501), 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 13:53:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52301 states to 52301 states and 78501 transitions. [2021-11-23 13:53:57,139 INFO L78 Accepts]: Start accepts. Automaton has 52301 states and 78501 transitions. Word has length 105 [2021-11-23 13:53:57,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:53:57,139 INFO L470 AbstractCegarLoop]: Abstraction has 52301 states and 78501 transitions. [2021-11-23 13:53:57,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 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 13:53:57,139 INFO L276 IsEmpty]: Start isEmpty. Operand 52301 states and 78501 transitions. [2021-11-23 13:53:57,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 13:53:57,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:57,143 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:53:57,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 13:53:57,143 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:57,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:57,144 INFO L85 PathProgramCache]: Analyzing trace with hash 651039571, now seen corresponding path program 1 times [2021-11-23 13:53:57,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:57,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609979309] [2021-11-23 13:53:57,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:57,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:57,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:53:57,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:57,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609979309] [2021-11-23 13:53:57,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609979309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:53:57,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:53:57,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:53:57,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989155561] [2021-11-23 13:53:57,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:53:57,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:53:57,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:53:57,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:53:57,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:53:57,227 INFO L87 Difference]: Start difference. First operand 52301 states and 78501 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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 13:53:59,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:59,201 INFO L93 Difference]: Finished difference Result 77875 states and 117412 transitions. [2021-11-23 13:53:59,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:53:59,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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 105 [2021-11-23 13:53:59,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:59,284 INFO L225 Difference]: With dead ends: 77875 [2021-11-23 13:53:59,285 INFO L226 Difference]: Without dead ends: 63683 [2021-11-23 13:53:59,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:53:59,303 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 464 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:59,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 856 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:53:59,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63683 states. [2021-11-23 13:54:01,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63683 to 61397. [2021-11-23 13:54:01,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61397 states, 61396 states have (on average 1.5026223206723566) internal successors, (92255), 61396 states have internal predecessors, (92255), 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 13:54:01,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61397 states to 61397 states and 92255 transitions. [2021-11-23 13:54:01,734 INFO L78 Accepts]: Start accepts. Automaton has 61397 states and 92255 transitions. Word has length 105 [2021-11-23 13:54:01,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:54:01,735 INFO L470 AbstractCegarLoop]: Abstraction has 61397 states and 92255 transitions. [2021-11-23 13:54:01,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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 13:54:01,735 INFO L276 IsEmpty]: Start isEmpty. Operand 61397 states and 92255 transitions. [2021-11-23 13:54:01,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 13:54:01,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:54:01,738 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:54:01,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 13:54:01,739 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:54:01,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:54:01,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1079524893, now seen corresponding path program 1 times [2021-11-23 13:54:01,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:54:01,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120614689] [2021-11-23 13:54:01,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:54:01,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:54:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:54:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:54:01,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:54:01,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120614689] [2021-11-23 13:54:01,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120614689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:54:01,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:54:01,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:54:01,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262364411] [2021-11-23 13:54:01,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:54:01,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:54:01,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:54:01,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:54:01,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:54:01,802 INFO L87 Difference]: Start difference. First operand 61397 states and 92255 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 13:54:04,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:54:04,422 INFO L93 Difference]: Finished difference Result 105556 states and 159143 transitions. [2021-11-23 13:54:04,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:54:04,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 106 [2021-11-23 13:54:04,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:54:04,554 INFO L225 Difference]: With dead ends: 105556 [2021-11-23 13:54:04,554 INFO L226 Difference]: Without dead ends: 82268 [2021-11-23 13:54:04,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:54:04,580 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 195 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:54:04,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 685 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:54:04,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82268 states. [2021-11-23 13:54:07,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82268 to 79984. [2021-11-23 13:54:07,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79984 states, 79983 states have (on average 1.5002312991510696) internal successors, (119993), 79983 states have internal predecessors, (119993), 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 13:54:07,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79984 states to 79984 states and 119993 transitions. [2021-11-23 13:54:07,637 INFO L78 Accepts]: Start accepts. Automaton has 79984 states and 119993 transitions. Word has length 106 [2021-11-23 13:54:07,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:54:07,637 INFO L470 AbstractCegarLoop]: Abstraction has 79984 states and 119993 transitions. [2021-11-23 13:54:07,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 13:54:07,638 INFO L276 IsEmpty]: Start isEmpty. Operand 79984 states and 119993 transitions. [2021-11-23 13:54:07,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 13:54:07,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:54:07,641 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:54:07,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 13:54:07,641 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:54:07,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:54:07,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1502226719, now seen corresponding path program 1 times [2021-11-23 13:54:07,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:54:07,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783154238] [2021-11-23 13:54:07,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:54:07,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:54:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:54:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:54:07,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:54:07,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783154238] [2021-11-23 13:54:07,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783154238] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:54:07,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:54:07,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:54:07,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169091755] [2021-11-23 13:54:07,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:54:07,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:54:07,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:54:07,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:54:07,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:54:07,693 INFO L87 Difference]: Start difference. First operand 79984 states and 119993 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 13:54:12,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:54:12,530 INFO L93 Difference]: Finished difference Result 183177 states and 275091 transitions. [2021-11-23 13:54:12,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:54:12,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 106 [2021-11-23 13:54:12,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:54:12,792 INFO L225 Difference]: With dead ends: 183177 [2021-11-23 13:54:12,792 INFO L226 Difference]: Without dead ends: 141293 [2021-11-23 13:54:12,839 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 13:54:12,840 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 85 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:54:12,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 367 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:54:12,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141293 states.