./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/pipeline.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185ccda7-f1f5-452d-988b-b9f6e921b7ce/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185ccda7-f1f5-452d-988b-b9f6e921b7ce/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185ccda7-f1f5-452d-988b-b9f6e921b7ce/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185ccda7-f1f5-452d-988b-b9f6e921b7ce/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/pipeline.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185ccda7-f1f5-452d-988b-b9f6e921b7ce/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185ccda7-f1f5-452d-988b-b9f6e921b7ce/bin/uautomizer-IVEQpCNsaX --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 79bbe68806c3ba3852cd8c209d4ce80dca551636a131cc65daaf97524d927c63 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:32:03,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:32:03,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:32:04,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:32:04,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:32:04,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:32:04,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:32:04,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:32:04,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:32:04,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:32:04,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:32:04,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:32:04,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:32:04,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:32:04,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:32:04,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:32:04,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:32:04,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:32:04,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:32:04,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:32:04,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:32:04,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:32:04,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:32:04,108 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:32:04,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:32:04,116 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:32:04,117 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:32:04,119 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:32:04,120 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:32:04,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:32:04,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:32:04,125 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:32:04,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:32:04,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:32:04,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:32:04,131 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:32:04,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:32:04,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:32:04,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:32:04,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:32:04,135 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:32:04,136 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185ccda7-f1f5-452d-988b-b9f6e921b7ce/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:32:04,196 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:32:04,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:32:04,199 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:32:04,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:32:04,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:32:04,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:32:04,209 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:32:04,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:32:04,210 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:32:04,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:32:04,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:32:04,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:32:04,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:32:04,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:32:04,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:32:04,213 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:32:04,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:32:04,213 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:32:04,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:32:04,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:32:04,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:32:04,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:32:04,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:32:04,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:32:04,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:32:04,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:32:04,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:32:04,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:32:04,217 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:32:04,217 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:32:04,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:32:04,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:32:04,218 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_185ccda7-f1f5-452d-988b-b9f6e921b7ce/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185ccda7-f1f5-452d-988b-b9f6e921b7ce/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79bbe68806c3ba3852cd8c209d4ce80dca551636a131cc65daaf97524d927c63 [2021-11-09 08:32:04,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:32:04,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:32:04,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:32:04,584 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:32:04,584 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:32:04,586 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185ccda7-f1f5-452d-988b-b9f6e921b7ce/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/systemc/pipeline.cil-1.c [2021-11-09 08:32:04,687 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185ccda7-f1f5-452d-988b-b9f6e921b7ce/bin/uautomizer-IVEQpCNsaX/data/2ca53dc37/c962bafbc0e146969e1b6438411730fa/FLAG83dac8748 [2021-11-09 08:32:05,271 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:32:05,272 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185ccda7-f1f5-452d-988b-b9f6e921b7ce/sv-benchmarks/c/systemc/pipeline.cil-1.c [2021-11-09 08:32:05,284 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185ccda7-f1f5-452d-988b-b9f6e921b7ce/bin/uautomizer-IVEQpCNsaX/data/2ca53dc37/c962bafbc0e146969e1b6438411730fa/FLAG83dac8748 [2021-11-09 08:32:05,566 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185ccda7-f1f5-452d-988b-b9f6e921b7ce/bin/uautomizer-IVEQpCNsaX/data/2ca53dc37/c962bafbc0e146969e1b6438411730fa [2021-11-09 08:32:05,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:32:05,570 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:32:05,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:32:05,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:32:05,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:32:05,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:32:05" (1/1) ... [2021-11-09 08:32:05,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77028510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:05, skipping insertion in model container [2021-11-09 08:32:05,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:32:05" (1/1) ... [2021-11-09 08:32:05,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:32:05,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:32:05,814 WARN L228 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_185ccda7-f1f5-452d-988b-b9f6e921b7ce/sv-benchmarks/c/systemc/pipeline.cil-1.c[640,653] [2021-11-09 08:32:05,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:32:05,919 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:32:05,933 WARN L228 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_185ccda7-f1f5-452d-988b-b9f6e921b7ce/sv-benchmarks/c/systemc/pipeline.cil-1.c[640,653] [2021-11-09 08:32:06,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:32:06,035 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:32:06,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:06 WrapperNode [2021-11-09 08:32:06,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:32:06,037 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:32:06,037 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:32:06,038 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:32:06,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:06" (1/1) ... [2021-11-09 08:32:06,059 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:06" (1/1) ... [2021-11-09 08:32:06,112 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:32:06,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:32:06,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:32:06,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:32:06,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:06" (1/1) ... [2021-11-09 08:32:06,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:06" (1/1) ... [2021-11-09 08:32:06,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:06" (1/1) ... [2021-11-09 08:32:06,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:06" (1/1) ... [2021-11-09 08:32:06,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:06" (1/1) ... [2021-11-09 08:32:06,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:06" (1/1) ... [2021-11-09 08:32:06,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:06" (1/1) ... [2021-11-09 08:32:06,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:32:06,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:32:06,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:32:06,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:32:06,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:06" (1/1) ... [2021-11-09 08:32:06,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:32:06,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185ccda7-f1f5-452d-988b-b9f6e921b7ce/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:06,246 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185ccda7-f1f5-452d-988b-b9f6e921b7ce/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:06,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185ccda7-f1f5-452d-988b-b9f6e921b7ce/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:32:06,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:32:06,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:32:06,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:32:06,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:32:07,638 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:32:07,639 INFO L299 CfgBuilder]: Removed 55 assume(true) statements. [2021-11-09 08:32:07,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:32:07 BoogieIcfgContainer [2021-11-09 08:32:07,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:32:07,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:32:07,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:32:07,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:32:07,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:32:05" (1/3) ... [2021-11-09 08:32:07,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@472bd756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:32:07, skipping insertion in model container [2021-11-09 08:32:07,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:06" (2/3) ... [2021-11-09 08:32:07,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@472bd756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:32:07, skipping insertion in model container [2021-11-09 08:32:07,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:32:07" (3/3) ... [2021-11-09 08:32:07,655 INFO L111 eAbstractionObserver]: Analyzing ICFG pipeline.cil-1.c [2021-11-09 08:32:07,668 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:32:07,668 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:32:07,749 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:32:07,759 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 [2021-11-09 08:32:07,759 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:32:07,799 INFO L276 IsEmpty]: Start isEmpty. Operand has 405 states, 403 states have (on average 1.8535980148883375) internal successors, (747), 404 states have internal predecessors, (747), 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) [2021-11-09 08:32:07,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-09 08:32:07,812 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:07,812 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:07,813 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:07,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:07,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1155336598, now seen corresponding path program 1 times [2021-11-09 08:32:07,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:07,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120844734] [2021-11-09 08:32:07,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:07,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:08,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:08,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120844734] [2021-11-09 08:32:08,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120844734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:08,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:08,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:32:08,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825836749] [2021-11-09 08:32:08,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:08,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:08,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:08,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:08,150 INFO L87 Difference]: Start difference. First operand has 405 states, 403 states have (on average 1.8535980148883375) internal successors, (747), 404 states have internal predecessors, (747), 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 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:08,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:08,364 INFO L93 Difference]: Finished difference Result 1135 states and 2109 transitions. [2021-11-09 08:32:08,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:32:08,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-09 08:32:08,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:08,386 INFO L225 Difference]: With dead ends: 1135 [2021-11-09 08:32:08,386 INFO L226 Difference]: Without dead ends: 733 [2021-11-09 08:32:08,391 INFO L786 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 [2021-11-09 08:32:08,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-11-09 08:32:08,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 731. [2021-11-09 08:32:08,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 1.8136986301369864) internal successors, (1324), 730 states have internal predecessors, (1324), 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) [2021-11-09 08:32:08,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1324 transitions. [2021-11-09 08:32:08,495 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1324 transitions. Word has length 86 [2021-11-09 08:32:08,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:08,496 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 1324 transitions. [2021-11-09 08:32:08,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:08,496 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1324 transitions. [2021-11-09 08:32:08,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:08,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:08,507 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:08,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:32:08,508 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:08,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:08,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1210635410, now seen corresponding path program 1 times [2021-11-09 08:32:08,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:08,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3435764] [2021-11-09 08:32:08,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:08,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:08,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:08,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3435764] [2021-11-09 08:32:08,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3435764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:08,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:08,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:32:08,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014371320] [2021-11-09 08:32:08,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:08,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:08,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:08,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:08,677 INFO L87 Difference]: Start difference. First operand 731 states and 1324 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:08,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:08,803 INFO L93 Difference]: Finished difference Result 1437 states and 2606 transitions. [2021-11-09 08:32:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:32:08,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:08,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:08,810 INFO L225 Difference]: With dead ends: 1437 [2021-11-09 08:32:08,810 INFO L226 Difference]: Without dead ends: 733 [2021-11-09 08:32:08,817 INFO L786 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 [2021-11-09 08:32:08,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-11-09 08:32:08,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 731. [2021-11-09 08:32:08,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 1.8068493150684932) internal successors, (1319), 730 states have internal predecessors, (1319), 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) [2021-11-09 08:32:08,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1319 transitions. [2021-11-09 08:32:08,902 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1319 transitions. Word has length 180 [2021-11-09 08:32:08,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:08,904 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 1319 transitions. [2021-11-09 08:32:08,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:08,904 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1319 transitions. [2021-11-09 08:32:08,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:08,916 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:08,917 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:08,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:32:08,918 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:08,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:08,921 INFO L85 PathProgramCache]: Analyzing trace with hash 242857622, now seen corresponding path program 1 times [2021-11-09 08:32:08,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:08,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672058220] [2021-11-09 08:32:08,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:08,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:09,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:09,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672058220] [2021-11-09 08:32:09,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672058220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:09,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:09,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:32:09,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220463910] [2021-11-09 08:32:09,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:09,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:09,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:09,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:09,059 INFO L87 Difference]: Start difference. First operand 731 states and 1319 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:09,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:09,183 INFO L93 Difference]: Finished difference Result 1435 states and 2593 transitions. [2021-11-09 08:32:09,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:32:09,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:09,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:09,190 INFO L225 Difference]: With dead ends: 1435 [2021-11-09 08:32:09,190 INFO L226 Difference]: Without dead ends: 733 [2021-11-09 08:32:09,192 INFO L786 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 [2021-11-09 08:32:09,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-11-09 08:32:09,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 731. [2021-11-09 08:32:09,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 1.8) internal successors, (1314), 730 states have internal predecessors, (1314), 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) [2021-11-09 08:32:09,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1314 transitions. [2021-11-09 08:32:09,223 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1314 transitions. Word has length 180 [2021-11-09 08:32:09,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:09,224 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 1314 transitions. [2021-11-09 08:32:09,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:09,225 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1314 transitions. [2021-11-09 08:32:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:09,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:09,228 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:09,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:32:09,229 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:09,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:09,230 INFO L85 PathProgramCache]: Analyzing trace with hash -924628582, now seen corresponding path program 1 times [2021-11-09 08:32:09,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:09,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141100920] [2021-11-09 08:32:09,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:09,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:09,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:09,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:09,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141100920] [2021-11-09 08:32:09,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141100920] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:09,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:09,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:32:09,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601502893] [2021-11-09 08:32:09,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:09,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:09,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:09,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:09,396 INFO L87 Difference]: Start difference. First operand 731 states and 1314 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:09,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:09,520 INFO L93 Difference]: Finished difference Result 1434 states and 2582 transitions. [2021-11-09 08:32:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:32:09,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:09,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:09,526 INFO L225 Difference]: With dead ends: 1434 [2021-11-09 08:32:09,527 INFO L226 Difference]: Without dead ends: 733 [2021-11-09 08:32:09,529 INFO L786 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 [2021-11-09 08:32:09,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-11-09 08:32:09,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 731. [2021-11-09 08:32:09,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 1.7931506849315069) internal successors, (1309), 730 states have internal predecessors, (1309), 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) [2021-11-09 08:32:09,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1309 transitions. [2021-11-09 08:32:09,560 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1309 transitions. Word has length 180 [2021-11-09 08:32:09,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:09,561 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 1309 transitions. [2021-11-09 08:32:09,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:09,561 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1309 transitions. [2021-11-09 08:32:09,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:09,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:09,565 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:09,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 08:32:09,565 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:09,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:09,568 INFO L85 PathProgramCache]: Analyzing trace with hash -415849768, now seen corresponding path program 1 times [2021-11-09 08:32:09,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:09,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191246774] [2021-11-09 08:32:09,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:09,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:09,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:09,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:09,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191246774] [2021-11-09 08:32:09,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191246774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:09,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:09,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:32:09,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610515956] [2021-11-09 08:32:09,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:32:09,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:09,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:32:09,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:32:09,686 INFO L87 Difference]: Start difference. First operand 731 states and 1309 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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) [2021-11-09 08:32:09,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:09,778 INFO L93 Difference]: Finished difference Result 1775 states and 3187 transitions. [2021-11-09 08:32:09,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:32:09,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:09,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:09,787 INFO L225 Difference]: With dead ends: 1775 [2021-11-09 08:32:09,787 INFO L226 Difference]: Without dead ends: 1075 [2021-11-09 08:32:09,789 INFO L786 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 [2021-11-09 08:32:09,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-11-09 08:32:09,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1073. [2021-11-09 08:32:09,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 1.775186567164179) internal successors, (1903), 1072 states have internal predecessors, (1903), 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) [2021-11-09 08:32:09,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1903 transitions. [2021-11-09 08:32:09,846 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1903 transitions. Word has length 180 [2021-11-09 08:32:09,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:09,847 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 1903 transitions. [2021-11-09 08:32:09,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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) [2021-11-09 08:32:09,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1903 transitions. [2021-11-09 08:32:09,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:09,852 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:09,852 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:09,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 08:32:09,853 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:09,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:09,854 INFO L85 PathProgramCache]: Analyzing trace with hash -526480548, now seen corresponding path program 1 times [2021-11-09 08:32:09,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:09,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094041909] [2021-11-09 08:32:09,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:09,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:09,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:09,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094041909] [2021-11-09 08:32:09,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094041909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:09,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:09,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:32:09,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755543119] [2021-11-09 08:32:09,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:09,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:09,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:09,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:09,920 INFO L87 Difference]: Start difference. First operand 1073 states and 1903 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:10,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:10,176 INFO L93 Difference]: Finished difference Result 3209 states and 5627 transitions. [2021-11-09 08:32:10,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:32:10,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:10,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:10,200 INFO L225 Difference]: With dead ends: 3209 [2021-11-09 08:32:10,201 INFO L226 Difference]: Without dead ends: 2168 [2021-11-09 08:32:10,203 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:32:10,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2021-11-09 08:32:10,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 1469. [2021-11-09 08:32:10,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1468 states have (on average 1.715940054495913) internal successors, (2519), 1468 states have internal predecessors, (2519), 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) [2021-11-09 08:32:10,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 2519 transitions. [2021-11-09 08:32:10,269 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 2519 transitions. Word has length 180 [2021-11-09 08:32:10,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:10,269 INFO L470 AbstractCegarLoop]: Abstraction has 1469 states and 2519 transitions. [2021-11-09 08:32:10,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:10,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 2519 transitions. [2021-11-09 08:32:10,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:10,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:10,274 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:10,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 08:32:10,275 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:10,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:10,275 INFO L85 PathProgramCache]: Analyzing trace with hash 382202076, now seen corresponding path program 1 times [2021-11-09 08:32:10,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:10,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238129409] [2021-11-09 08:32:10,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:10,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:10,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:10,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238129409] [2021-11-09 08:32:10,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238129409] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:10,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:10,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:32:10,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897876581] [2021-11-09 08:32:10,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:10,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:10,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:10,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:10,370 INFO L87 Difference]: Start difference. First operand 1469 states and 2519 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:10,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:10,590 INFO L93 Difference]: Finished difference Result 4534 states and 7682 transitions. [2021-11-09 08:32:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:32:10,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:10,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:10,610 INFO L225 Difference]: With dead ends: 4534 [2021-11-09 08:32:10,610 INFO L226 Difference]: Without dead ends: 3125 [2021-11-09 08:32:10,613 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:32:10,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2021-11-09 08:32:10,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 2181. [2021-11-09 08:32:10,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 1.6619266055045872) internal successors, (3623), 2180 states have internal predecessors, (3623), 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) [2021-11-09 08:32:10,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 3623 transitions. [2021-11-09 08:32:10,697 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 3623 transitions. Word has length 180 [2021-11-09 08:32:10,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:10,697 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 3623 transitions. [2021-11-09 08:32:10,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:10,698 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 3623 transitions. [2021-11-09 08:32:10,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:10,702 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:10,703 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:10,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 08:32:10,703 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:10,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:10,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1796987740, now seen corresponding path program 1 times [2021-11-09 08:32:10,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:10,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819152359] [2021-11-09 08:32:10,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:10,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:10,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:10,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819152359] [2021-11-09 08:32:10,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819152359] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:10,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:10,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:32:10,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726651792] [2021-11-09 08:32:10,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:10,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:10,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:10,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:10,761 INFO L87 Difference]: Start difference. First operand 2181 states and 3623 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:11,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:11,016 INFO L93 Difference]: Finished difference Result 6885 states and 11308 transitions. [2021-11-09 08:32:11,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:32:11,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:11,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:11,044 INFO L225 Difference]: With dead ends: 6885 [2021-11-09 08:32:11,044 INFO L226 Difference]: Without dead ends: 4814 [2021-11-09 08:32:11,048 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:32:11,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4814 states. [2021-11-09 08:32:11,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4814 to 3429. [2021-11-09 08:32:11,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 1.616977829638273) internal successors, (5543), 3428 states have internal predecessors, (5543), 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) [2021-11-09 08:32:11,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 5543 transitions. [2021-11-09 08:32:11,173 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 5543 transitions. Word has length 180 [2021-11-09 08:32:11,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:11,173 INFO L470 AbstractCegarLoop]: Abstraction has 3429 states and 5543 transitions. [2021-11-09 08:32:11,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:11,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 5543 transitions. [2021-11-09 08:32:11,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:11,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:11,181 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:11,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 08:32:11,181 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:11,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:11,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1621057316, now seen corresponding path program 1 times [2021-11-09 08:32:11,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:11,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503171142] [2021-11-09 08:32:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:11,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:11,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:11,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503171142] [2021-11-09 08:32:11,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503171142] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:11,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:11,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:32:11,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311202268] [2021-11-09 08:32:11,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:11,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:11,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:11,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:11,235 INFO L87 Difference]: Start difference. First operand 3429 states and 5543 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:11,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:11,519 INFO L93 Difference]: Finished difference Result 10946 states and 17506 transitions. [2021-11-09 08:32:11,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:32:11,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:11,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:11,561 INFO L225 Difference]: With dead ends: 10946 [2021-11-09 08:32:11,561 INFO L226 Difference]: Without dead ends: 7715 [2021-11-09 08:32:11,567 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:32:11,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7715 states. [2021-11-09 08:32:11,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7715 to 5557. [2021-11-09 08:32:11,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5557 states, 5556 states have (on average 1.5793736501079914) internal successors, (8775), 5556 states have internal predecessors, (8775), 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) [2021-11-09 08:32:11,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5557 states to 5557 states and 8775 transitions. [2021-11-09 08:32:11,741 INFO L78 Accepts]: Start accepts. Automaton has 5557 states and 8775 transitions. Word has length 180 [2021-11-09 08:32:11,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:11,742 INFO L470 AbstractCegarLoop]: Abstraction has 5557 states and 8775 transitions. [2021-11-09 08:32:11,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:11,742 INFO L276 IsEmpty]: Start isEmpty. Operand 5557 states and 8775 transitions. [2021-11-09 08:32:11,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:11,784 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:11,785 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:11,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 08:32:11,785 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:11,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:11,786 INFO L85 PathProgramCache]: Analyzing trace with hash 346893148, now seen corresponding path program 1 times [2021-11-09 08:32:11,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:11,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851334388] [2021-11-09 08:32:11,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:11,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:11,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:11,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:11,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851334388] [2021-11-09 08:32:11,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851334388] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:11,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:11,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:32:11,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575069811] [2021-11-09 08:32:11,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:11,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:11,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:11,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:11,845 INFO L87 Difference]: Start difference. First operand 5557 states and 8775 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:12,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:12,159 INFO L93 Difference]: Finished difference Result 16989 states and 26456 transitions. [2021-11-09 08:32:12,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:32:12,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:12,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:12,219 INFO L225 Difference]: With dead ends: 16989 [2021-11-09 08:32:12,220 INFO L226 Difference]: Without dead ends: 11783 [2021-11-09 08:32:12,229 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:32:12,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11783 states. [2021-11-09 08:32:12,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11783 to 8309. [2021-11-09 08:32:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8309 states, 8308 states have (on average 1.533822821376986) internal successors, (12743), 8308 states have internal predecessors, (12743), 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) [2021-11-09 08:32:12,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8309 states to 8309 states and 12743 transitions. [2021-11-09 08:32:12,559 INFO L78 Accepts]: Start accepts. Automaton has 8309 states and 12743 transitions. Word has length 180 [2021-11-09 08:32:12,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:12,560 INFO L470 AbstractCegarLoop]: Abstraction has 8309 states and 12743 transitions. [2021-11-09 08:32:12,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:12,561 INFO L276 IsEmpty]: Start isEmpty. Operand 8309 states and 12743 transitions. [2021-11-09 08:32:12,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:12,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:12,574 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:12,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 08:32:12,575 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:12,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:12,576 INFO L85 PathProgramCache]: Analyzing trace with hash -462548706, now seen corresponding path program 1 times [2021-11-09 08:32:12,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:12,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54863691] [2021-11-09 08:32:12,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:12,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:12,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:12,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54863691] [2021-11-09 08:32:12,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54863691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:12,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:12,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:32:12,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418720200] [2021-11-09 08:32:12,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:12,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:12,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:12,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:12,647 INFO L87 Difference]: Start difference. First operand 8309 states and 12743 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:13,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:13,052 INFO L93 Difference]: Finished difference Result 24379 states and 36276 transitions. [2021-11-09 08:32:13,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:32:13,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:13,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:13,087 INFO L225 Difference]: With dead ends: 24379 [2021-11-09 08:32:13,087 INFO L226 Difference]: Without dead ends: 16630 [2021-11-09 08:32:13,100 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:32:13,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16630 states. [2021-11-09 08:32:13,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16630 to 11781. [2021-11-09 08:32:13,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11781 states, 11780 states have (on average 1.4539049235993209) internal successors, (17127), 11780 states have internal predecessors, (17127), 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) [2021-11-09 08:32:13,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11781 states to 11781 states and 17127 transitions. [2021-11-09 08:32:13,569 INFO L78 Accepts]: Start accepts. Automaton has 11781 states and 17127 transitions. Word has length 180 [2021-11-09 08:32:13,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:13,570 INFO L470 AbstractCegarLoop]: Abstraction has 11781 states and 17127 transitions. [2021-11-09 08:32:13,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:13,570 INFO L276 IsEmpty]: Start isEmpty. Operand 11781 states and 17127 transitions. [2021-11-09 08:32:13,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:13,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:13,593 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:13,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 08:32:13,593 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:13,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:13,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1194382688, now seen corresponding path program 1 times [2021-11-09 08:32:13,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:13,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546164006] [2021-11-09 08:32:13,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:13,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:13,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:13,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:13,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546164006] [2021-11-09 08:32:13,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546164006] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:13,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:13,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:32:13,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256534735] [2021-11-09 08:32:13,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:13,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:13,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:13,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:13,663 INFO L87 Difference]: Start difference. First operand 11781 states and 17127 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:14,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:14,181 INFO L93 Difference]: Finished difference Result 31369 states and 45350 transitions. [2021-11-09 08:32:14,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:32:14,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:14,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:14,319 INFO L225 Difference]: With dead ends: 31369 [2021-11-09 08:32:14,320 INFO L226 Difference]: Without dead ends: 20438 [2021-11-09 08:32:14,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:32:14,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20438 states. [2021-11-09 08:32:14,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20438 to 15269. [2021-11-09 08:32:14,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15269 states, 15268 states have (on average 1.4109903065234477) internal successors, (21543), 15268 states have internal predecessors, (21543), 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) [2021-11-09 08:32:14,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15269 states to 15269 states and 21543 transitions. [2021-11-09 08:32:14,784 INFO L78 Accepts]: Start accepts. Automaton has 15269 states and 21543 transitions. Word has length 180 [2021-11-09 08:32:14,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:14,785 INFO L470 AbstractCegarLoop]: Abstraction has 15269 states and 21543 transitions. [2021-11-09 08:32:14,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:14,785 INFO L276 IsEmpty]: Start isEmpty. Operand 15269 states and 21543 transitions. [2021-11-09 08:32:14,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:14,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:14,809 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:14,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 08:32:14,810 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:14,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:14,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1246496350, now seen corresponding path program 1 times [2021-11-09 08:32:14,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:14,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234782776] [2021-11-09 08:32:14,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:14,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:14,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:14,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234782776] [2021-11-09 08:32:14,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234782776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:14,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:14,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:32:14,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294772306] [2021-11-09 08:32:14,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:14,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:14,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:14,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:14,870 INFO L87 Difference]: Start difference. First operand 15269 states and 21543 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:15,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:15,289 INFO L93 Difference]: Finished difference Result 34597 states and 49428 transitions. [2021-11-09 08:32:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:32:15,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:15,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:15,344 INFO L225 Difference]: With dead ends: 34597 [2021-11-09 08:32:15,345 INFO L226 Difference]: Without dead ends: 20469 [2021-11-09 08:32:15,370 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:32:15,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20469 states. [2021-11-09 08:32:15,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20469 to 15301. [2021-11-09 08:32:15,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15301 states, 15300 states have (on average 1.4101307189542485) internal successors, (21575), 15300 states have internal predecessors, (21575), 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) [2021-11-09 08:32:15,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15301 states to 15301 states and 21575 transitions. [2021-11-09 08:32:15,851 INFO L78 Accepts]: Start accepts. Automaton has 15301 states and 21575 transitions. Word has length 180 [2021-11-09 08:32:15,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:15,852 INFO L470 AbstractCegarLoop]: Abstraction has 15301 states and 21575 transitions. [2021-11-09 08:32:15,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:15,852 INFO L276 IsEmpty]: Start isEmpty. Operand 15301 states and 21575 transitions. [2021-11-09 08:32:15,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:15,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:15,881 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:15,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 08:32:15,882 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:15,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:15,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1738875102, now seen corresponding path program 1 times [2021-11-09 08:32:15,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:15,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264574215] [2021-11-09 08:32:15,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:15,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:15,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:15,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264574215] [2021-11-09 08:32:15,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264574215] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:15,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:15,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:32:15,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160220503] [2021-11-09 08:32:15,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:32:15,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:15,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:32:15,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:32:15,945 INFO L87 Difference]: Start difference. First operand 15301 states and 21575 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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) [2021-11-09 08:32:16,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:16,415 INFO L93 Difference]: Finished difference Result 37206 states and 53495 transitions. [2021-11-09 08:32:16,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:32:16,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:16,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:16,474 INFO L225 Difference]: With dead ends: 37206 [2021-11-09 08:32:16,474 INFO L226 Difference]: Without dead ends: 23049 [2021-11-09 08:32:16,504 INFO L786 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 [2021-11-09 08:32:16,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23049 states. [2021-11-09 08:32:16,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23049 to 22567. [2021-11-09 08:32:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22567 states, 22566 states have (on average 1.4356554107950013) internal successors, (32397), 22566 states have internal predecessors, (32397), 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) [2021-11-09 08:32:17,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22567 states to 22567 states and 32397 transitions. [2021-11-09 08:32:17,020 INFO L78 Accepts]: Start accepts. Automaton has 22567 states and 32397 transitions. Word has length 180 [2021-11-09 08:32:17,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:17,022 INFO L470 AbstractCegarLoop]: Abstraction has 22567 states and 32397 transitions. [2021-11-09 08:32:17,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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) [2021-11-09 08:32:17,022 INFO L276 IsEmpty]: Start isEmpty. Operand 22567 states and 32397 transitions. [2021-11-09 08:32:17,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:17,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:17,057 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:17,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 08:32:17,058 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:17,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:17,059 INFO L85 PathProgramCache]: Analyzing trace with hash -569224856, now seen corresponding path program 1 times [2021-11-09 08:32:17,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:17,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599067491] [2021-11-09 08:32:17,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:17,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:17,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:17,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599067491] [2021-11-09 08:32:17,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599067491] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:17,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:17,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:32:17,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383911889] [2021-11-09 08:32:17,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:17,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:17,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:17,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:17,129 INFO L87 Difference]: Start difference. First operand 22567 states and 32397 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:17,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:17,767 INFO L93 Difference]: Finished difference Result 50833 states and 73580 transitions. [2021-11-09 08:32:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:32:17,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:17,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:17,838 INFO L225 Difference]: With dead ends: 50833 [2021-11-09 08:32:17,839 INFO L226 Difference]: Without dead ends: 29424 [2021-11-09 08:32:17,867 INFO L786 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 [2021-11-09 08:32:17,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29424 states. [2021-11-09 08:32:18,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29424 to 24981. [2021-11-09 08:32:18,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24981 states, 24980 states have (on average 1.4425940752602082) internal successors, (36036), 24980 states have internal predecessors, (36036), 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) [2021-11-09 08:32:18,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24981 states to 24981 states and 36036 transitions. [2021-11-09 08:32:18,682 INFO L78 Accepts]: Start accepts. Automaton has 24981 states and 36036 transitions. Word has length 180 [2021-11-09 08:32:18,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:18,682 INFO L470 AbstractCegarLoop]: Abstraction has 24981 states and 36036 transitions. [2021-11-09 08:32:18,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:18,683 INFO L276 IsEmpty]: Start isEmpty. Operand 24981 states and 36036 transitions. [2021-11-09 08:32:18,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:18,720 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:18,721 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:18,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 08:32:18,721 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:18,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:18,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1154930602, now seen corresponding path program 1 times [2021-11-09 08:32:18,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:18,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468353206] [2021-11-09 08:32:18,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:18,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:18,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:18,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468353206] [2021-11-09 08:32:18,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468353206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:18,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:18,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:32:18,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362398537] [2021-11-09 08:32:18,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:18,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:18,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:18,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:18,796 INFO L87 Difference]: Start difference. First operand 24981 states and 36036 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:19,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:19,463 INFO L93 Difference]: Finished difference Result 56415 states and 81970 transitions. [2021-11-09 08:32:19,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:32:19,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:19,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:19,530 INFO L225 Difference]: With dead ends: 56415 [2021-11-09 08:32:19,531 INFO L226 Difference]: Without dead ends: 32713 [2021-11-09 08:32:19,546 INFO L786 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 [2021-11-09 08:32:19,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32713 states. [2021-11-09 08:32:20,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32713 to 27825. [2021-11-09 08:32:20,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27825 states, 27824 states have (on average 1.450330649798735) internal successors, (40354), 27824 states have internal predecessors, (40354), 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) [2021-11-09 08:32:20,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27825 states to 27825 states and 40354 transitions. [2021-11-09 08:32:20,142 INFO L78 Accepts]: Start accepts. Automaton has 27825 states and 40354 transitions. Word has length 180 [2021-11-09 08:32:20,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:20,143 INFO L470 AbstractCegarLoop]: Abstraction has 27825 states and 40354 transitions. [2021-11-09 08:32:20,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:20,143 INFO L276 IsEmpty]: Start isEmpty. Operand 27825 states and 40354 transitions. [2021-11-09 08:32:20,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:20,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:20,177 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:20,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 08:32:20,177 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:20,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:20,178 INFO L85 PathProgramCache]: Analyzing trace with hash -377799382, now seen corresponding path program 1 times [2021-11-09 08:32:20,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:20,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342858114] [2021-11-09 08:32:20,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:20,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:20,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:20,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:20,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342858114] [2021-11-09 08:32:20,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342858114] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:20,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:20,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:32:20,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402703313] [2021-11-09 08:32:20,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:20,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:20,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:20,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:20,235 INFO L87 Difference]: Start difference. First operand 27825 states and 40354 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:21,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:21,087 INFO L93 Difference]: Finished difference Result 63483 states and 92646 transitions. [2021-11-09 08:32:21,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:32:21,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:21,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:21,176 INFO L225 Difference]: With dead ends: 63483 [2021-11-09 08:32:21,176 INFO L226 Difference]: Without dead ends: 37083 [2021-11-09 08:32:21,204 INFO L786 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 [2021-11-09 08:32:21,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37083 states. [2021-11-09 08:32:21,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37083 to 31529. [2021-11-09 08:32:21,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31529 states, 31528 states have (on average 1.4599720883024614) internal successors, (46030), 31528 states have internal predecessors, (46030), 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) [2021-11-09 08:32:21,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31529 states to 31529 states and 46030 transitions. [2021-11-09 08:32:21,945 INFO L78 Accepts]: Start accepts. Automaton has 31529 states and 46030 transitions. Word has length 180 [2021-11-09 08:32:21,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:21,946 INFO L470 AbstractCegarLoop]: Abstraction has 31529 states and 46030 transitions. [2021-11-09 08:32:21,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:21,946 INFO L276 IsEmpty]: Start isEmpty. Operand 31529 states and 46030 transitions. [2021-11-09 08:32:21,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:21,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:21,975 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:21,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-09 08:32:21,975 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:21,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:21,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1812715606, now seen corresponding path program 1 times [2021-11-09 08:32:21,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:21,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734690719] [2021-11-09 08:32:21,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:21,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:22,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:22,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734690719] [2021-11-09 08:32:22,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734690719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:22,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:22,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:32:22,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153636953] [2021-11-09 08:32:22,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:22,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:22,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:22,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:22,188 INFO L87 Difference]: Start difference. First operand 31529 states and 46030 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:22,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:22,734 INFO L93 Difference]: Finished difference Result 73523 states and 107894 transitions. [2021-11-09 08:32:22,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:32:22,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:22,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:22,824 INFO L225 Difference]: With dead ends: 73523 [2021-11-09 08:32:22,825 INFO L226 Difference]: Without dead ends: 43615 [2021-11-09 08:32:22,849 INFO L786 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 [2021-11-09 08:32:22,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43615 states. [2021-11-09 08:32:23,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43615 to 36953. [2021-11-09 08:32:23,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36953 states, 36952 states have (on average 1.472775492530851) internal successors, (54422), 36952 states have internal predecessors, (54422), 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) [2021-11-09 08:32:23,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36953 states to 36953 states and 54422 transitions. [2021-11-09 08:32:23,823 INFO L78 Accepts]: Start accepts. Automaton has 36953 states and 54422 transitions. Word has length 180 [2021-11-09 08:32:23,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:23,823 INFO L470 AbstractCegarLoop]: Abstraction has 36953 states and 54422 transitions. [2021-11-09 08:32:23,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:23,824 INFO L276 IsEmpty]: Start isEmpty. Operand 36953 states and 54422 transitions. [2021-11-09 08:32:23,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:23,867 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:23,867 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:23,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-09 08:32:23,868 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:23,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:23,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1720455894, now seen corresponding path program 1 times [2021-11-09 08:32:23,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:23,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454189446] [2021-11-09 08:32:23,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:23,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:23,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:23,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454189446] [2021-11-09 08:32:23,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454189446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:23,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:23,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:32:23,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146433490] [2021-11-09 08:32:23,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:23,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:23,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:23,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:23,928 INFO L87 Difference]: Start difference. First operand 36953 states and 54422 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:24,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:24,618 INFO L93 Difference]: Finished difference Result 93691 states and 137558 transitions. [2021-11-09 08:32:24,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:32:24,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:24,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:24,713 INFO L225 Difference]: With dead ends: 93691 [2021-11-09 08:32:24,714 INFO L226 Difference]: Without dead ends: 58655 [2021-11-09 08:32:24,752 INFO L786 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 [2021-11-09 08:32:24,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58655 states. [2021-11-09 08:32:25,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58655 to 45817. [2021-11-09 08:32:25,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45817 states, 45816 states have (on average 1.467565915837262) internal successors, (67238), 45816 states have internal predecessors, (67238), 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) [2021-11-09 08:32:25,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45817 states to 45817 states and 67238 transitions. [2021-11-09 08:32:25,856 INFO L78 Accepts]: Start accepts. Automaton has 45817 states and 67238 transitions. Word has length 180 [2021-11-09 08:32:25,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:25,857 INFO L470 AbstractCegarLoop]: Abstraction has 45817 states and 67238 transitions. [2021-11-09 08:32:25,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:25,857 INFO L276 IsEmpty]: Start isEmpty. Operand 45817 states and 67238 transitions. [2021-11-09 08:32:25,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:25,902 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:25,903 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:25,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 08:32:25,903 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:25,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:25,904 INFO L85 PathProgramCache]: Analyzing trace with hash 176523564, now seen corresponding path program 1 times [2021-11-09 08:32:25,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:25,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638502212] [2021-11-09 08:32:25,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:25,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:25,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:25,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638502212] [2021-11-09 08:32:25,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638502212] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:25,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:25,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:32:25,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267537966] [2021-11-09 08:32:25,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:25,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:25,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:25,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:25,959 INFO L87 Difference]: Start difference. First operand 45817 states and 67238 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:26,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:26,959 INFO L93 Difference]: Finished difference Result 114409 states and 166738 transitions. [2021-11-09 08:32:26,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:32:26,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:26,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:27,050 INFO L225 Difference]: With dead ends: 114409 [2021-11-09 08:32:27,050 INFO L226 Difference]: Without dead ends: 71007 [2021-11-09 08:32:27,079 INFO L786 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 [2021-11-09 08:32:27,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71007 states. [2021-11-09 08:32:28,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71007 to 56057. [2021-11-09 08:32:28,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56057 states, 56056 states have (on average 1.4700656486370771) internal successors, (82406), 56056 states have internal predecessors, (82406), 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) [2021-11-09 08:32:28,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56057 states to 56057 states and 82406 transitions. [2021-11-09 08:32:28,279 INFO L78 Accepts]: Start accepts. Automaton has 56057 states and 82406 transitions. Word has length 180 [2021-11-09 08:32:28,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:28,280 INFO L470 AbstractCegarLoop]: Abstraction has 56057 states and 82406 transitions. [2021-11-09 08:32:28,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:28,280 INFO L276 IsEmpty]: Start isEmpty. Operand 56057 states and 82406 transitions. [2021-11-09 08:32:28,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:28,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:28,335 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:28,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-09 08:32:28,335 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:28,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:28,336 INFO L85 PathProgramCache]: Analyzing trace with hash -2046938386, now seen corresponding path program 1 times [2021-11-09 08:32:28,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:28,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036680142] [2021-11-09 08:32:28,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:28,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:28,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:28,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036680142] [2021-11-09 08:32:28,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036680142] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:28,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:28,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:32:28,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433469039] [2021-11-09 08:32:28,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:28,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:28,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:28,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:28,390 INFO L87 Difference]: Start difference. First operand 56057 states and 82406 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:29,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:29,493 INFO L93 Difference]: Finished difference Result 132709 states and 191483 transitions. [2021-11-09 08:32:29,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:32:29,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:29,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:29,662 INFO L225 Difference]: With dead ends: 132709 [2021-11-09 08:32:29,662 INFO L226 Difference]: Without dead ends: 79711 [2021-11-09 08:32:29,712 INFO L786 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 [2021-11-09 08:32:29,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79711 states. [2021-11-09 08:32:30,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79711 to 64281. [2021-11-09 08:32:30,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64281 states, 64280 states have (on average 1.4308338518979464) internal successors, (91974), 64280 states have internal predecessors, (91974), 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) [2021-11-09 08:32:30,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64281 states to 64281 states and 91974 transitions. [2021-11-09 08:32:30,666 INFO L78 Accepts]: Start accepts. Automaton has 64281 states and 91974 transitions. Word has length 180 [2021-11-09 08:32:31,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:31,055 INFO L470 AbstractCegarLoop]: Abstraction has 64281 states and 91974 transitions. [2021-11-09 08:32:31,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:31,056 INFO L276 IsEmpty]: Start isEmpty. Operand 64281 states and 91974 transitions. [2021-11-09 08:32:31,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:31,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:31,166 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:31,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 08:32:31,167 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:31,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:31,168 INFO L85 PathProgramCache]: Analyzing trace with hash 629545776, now seen corresponding path program 1 times [2021-11-09 08:32:31,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:31,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283028988] [2021-11-09 08:32:31,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:31,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:31,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:31,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283028988] [2021-11-09 08:32:31,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283028988] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:31,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:31,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:32:31,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746279134] [2021-11-09 08:32:31,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:31,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:31,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:31,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:31,217 INFO L87 Difference]: Start difference. First operand 64281 states and 91974 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:31,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:31,908 INFO L93 Difference]: Finished difference Result 180883 states and 259055 transitions. [2021-11-09 08:32:31,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:32:31,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:31,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:32,087 INFO L225 Difference]: With dead ends: 180883 [2021-11-09 08:32:32,087 INFO L226 Difference]: Without dead ends: 119091 [2021-11-09 08:32:32,127 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:32:32,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119091 states. [2021-11-09 08:32:33,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119091 to 88841. [2021-11-09 08:32:33,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88841 states, 88840 states have (on average 1.4133048176497074) internal successors, (125558), 88840 states have internal predecessors, (125558), 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) [2021-11-09 08:32:34,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88841 states to 88841 states and 125558 transitions. [2021-11-09 08:32:34,108 INFO L78 Accepts]: Start accepts. Automaton has 88841 states and 125558 transitions. Word has length 180 [2021-11-09 08:32:34,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:34,109 INFO L470 AbstractCegarLoop]: Abstraction has 88841 states and 125558 transitions. [2021-11-09 08:32:34,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:34,109 INFO L276 IsEmpty]: Start isEmpty. Operand 88841 states and 125558 transitions. [2021-11-09 08:32:34,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:34,183 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:34,184 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:34,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-09 08:32:34,185 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:34,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:34,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1246261392, now seen corresponding path program 1 times [2021-11-09 08:32:34,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:34,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312578177] [2021-11-09 08:32:34,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:34,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:34,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:34,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312578177] [2021-11-09 08:32:34,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312578177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:34,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:34,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:32:34,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726818517] [2021-11-09 08:32:34,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:34,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:34,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:34,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:34,278 INFO L87 Difference]: Start difference. First operand 88841 states and 125558 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:35,097 INFO L93 Difference]: Finished difference Result 220655 states and 310282 transitions. [2021-11-09 08:32:35,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:32:35,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:35,245 INFO L225 Difference]: With dead ends: 220655 [2021-11-09 08:32:35,245 INFO L226 Difference]: Without dead ends: 136703 [2021-11-09 08:32:35,294 INFO L786 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 [2021-11-09 08:32:35,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136703 states. [2021-11-09 08:32:37,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136703 to 120937. [2021-11-09 08:32:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120937 states, 120936 states have (on average 1.403899583250645) internal successors, (169782), 120936 states have internal predecessors, (169782), 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) [2021-11-09 08:32:37,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120937 states to 120937 states and 169782 transitions. [2021-11-09 08:32:37,877 INFO L78 Accepts]: Start accepts. Automaton has 120937 states and 169782 transitions. Word has length 180 [2021-11-09 08:32:37,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:37,878 INFO L470 AbstractCegarLoop]: Abstraction has 120937 states and 169782 transitions. [2021-11-09 08:32:37,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-11-09 08:32:37,878 INFO L276 IsEmpty]: Start isEmpty. Operand 120937 states and 169782 transitions. [2021-11-09 08:32:37,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 08:32:37,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:37,951 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:37,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-09 08:32:37,952 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:37,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:37,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1195432242, now seen corresponding path program 1 times [2021-11-09 08:32:37,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:37,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416261501] [2021-11-09 08:32:37,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:37,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:37,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:37,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416261501] [2021-11-09 08:32:37,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416261501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:37,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:37,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:32:37,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046110817] [2021-11-09 08:32:37,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:32:37,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:37,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:32:37,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:32:37,994 INFO L87 Difference]: Start difference. First operand 120937 states and 169782 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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) [2021-11-09 08:32:38,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:38,535 INFO L93 Difference]: Finished difference Result 213389 states and 299577 transitions. [2021-11-09 08:32:38,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:32:38,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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 180 [2021-11-09 08:32:38,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:38,665 INFO L225 Difference]: With dead ends: 213389 [2021-11-09 08:32:38,665 INFO L226 Difference]: Without dead ends: 120937 [2021-11-09 08:32:38,714 INFO L786 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 [2021-11-09 08:32:38,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120937 states. [2021-11-09 08:32:40,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120937 to 120937. [2021-11-09 08:32:40,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120937 states, 120936 states have (on average 1.3975491168882714) internal successors, (169014), 120936 states have internal predecessors, (169014), 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) [2021-11-09 08:32:41,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120937 states to 120937 states and 169014 transitions. [2021-11-09 08:32:41,068 INFO L78 Accepts]: Start accepts. Automaton has 120937 states and 169014 transitions. Word has length 180 [2021-11-09 08:32:41,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:41,069 INFO L470 AbstractCegarLoop]: Abstraction has 120937 states and 169014 transitions. [2021-11-09 08:32:41,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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) [2021-11-09 08:32:41,069 INFO L276 IsEmpty]: Start isEmpty. Operand 120937 states and 169014 transitions. [2021-11-09 08:32:41,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-09 08:32:41,143 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:41,144 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:41,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-09 08:32:41,144 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:41,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:41,145 INFO L85 PathProgramCache]: Analyzing trace with hash -750404731, now seen corresponding path program 1 times [2021-11-09 08:32:41,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:41,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144887844] [2021-11-09 08:32:41,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:41,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:41,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:41,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144887844] [2021-11-09 08:32:41,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144887844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:41,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:41,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:32:41,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372469871] [2021-11-09 08:32:41,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:32:41,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:41,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:32:41,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:32:41,206 INFO L87 Difference]: Start difference. First operand 120937 states and 169014 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 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) [2021-11-09 08:32:42,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:42,542 INFO L93 Difference]: Finished difference Result 239625 states and 332707 transitions. [2021-11-09 08:32:42,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:32:42,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 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 182 [2021-11-09 08:32:42,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:42,868 INFO L225 Difference]: With dead ends: 239625 [2021-11-09 08:32:42,869 INFO L226 Difference]: Without dead ends: 147173 [2021-11-09 08:32:42,923 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:32:43,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147173 states. [2021-11-09 08:32:44,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147173 to 144589. [2021-11-09 08:32:44,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144589 states, 144588 states have (on average 1.384091349212936) internal successors, (200123), 144588 states have internal predecessors, (200123), 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) [2021-11-09 08:32:45,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144589 states to 144589 states and 200123 transitions. [2021-11-09 08:32:45,104 INFO L78 Accepts]: Start accepts. Automaton has 144589 states and 200123 transitions. Word has length 182 [2021-11-09 08:32:45,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:45,104 INFO L470 AbstractCegarLoop]: Abstraction has 144589 states and 200123 transitions. [2021-11-09 08:32:45,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 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) [2021-11-09 08:32:45,105 INFO L276 IsEmpty]: Start isEmpty. Operand 144589 states and 200123 transitions. [2021-11-09 08:32:45,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-09 08:32:45,198 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:45,198 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:45,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-09 08:32:45,198 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:45,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:45,199 INFO L85 PathProgramCache]: Analyzing trace with hash 570050343, now seen corresponding path program 1 times [2021-11-09 08:32:45,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:45,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477564635] [2021-11-09 08:32:45,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:45,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:45,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:45,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477564635] [2021-11-09 08:32:45,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477564635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:45,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:45,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:32:45,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853444258] [2021-11-09 08:32:45,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:45,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:45,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:45,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:45,254 INFO L87 Difference]: Start difference. First operand 144589 states and 200123 transitions. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 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) [2021-11-09 08:32:46,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:46,804 INFO L93 Difference]: Finished difference Result 287965 states and 398522 transitions. [2021-11-09 08:32:46,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:32:46,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 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 183 [2021-11-09 08:32:46,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:46,978 INFO L225 Difference]: With dead ends: 287965 [2021-11-09 08:32:46,978 INFO L226 Difference]: Without dead ends: 144591 [2021-11-09 08:32:47,034 INFO L786 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 [2021-11-09 08:32:47,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144591 states. [2021-11-09 08:32:48,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144591 to 144589. [2021-11-09 08:32:48,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144589 states, 144588 states have (on average 1.3708122389133262) internal successors, (198203), 144588 states have internal predecessors, (198203), 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) [2021-11-09 08:32:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144589 states to 144589 states and 198203 transitions. [2021-11-09 08:32:49,794 INFO L78 Accepts]: Start accepts. Automaton has 144589 states and 198203 transitions. Word has length 183 [2021-11-09 08:32:49,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:49,794 INFO L470 AbstractCegarLoop]: Abstraction has 144589 states and 198203 transitions. [2021-11-09 08:32:49,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 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) [2021-11-09 08:32:49,795 INFO L276 IsEmpty]: Start isEmpty. Operand 144589 states and 198203 transitions. [2021-11-09 08:32:49,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-09 08:32:49,997 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:49,997 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:49,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-09 08:32:49,997 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:49,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:49,998 INFO L85 PathProgramCache]: Analyzing trace with hash -572452123, now seen corresponding path program 1 times [2021-11-09 08:32:49,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:49,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16618805] [2021-11-09 08:32:49,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:49,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:50,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:50,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16618805] [2021-11-09 08:32:50,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16618805] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:50,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:50,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:32:50,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044410865] [2021-11-09 08:32:50,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:32:50,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:50,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:32:50,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:32:50,044 INFO L87 Difference]: Start difference. First operand 144589 states and 198203 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 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) [2021-11-09 08:32:50,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:50,910 INFO L93 Difference]: Finished difference Result 270770 states and 372324 transitions. [2021-11-09 08:32:50,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:32:50,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 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 183 [2021-11-09 08:32:50,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:51,074 INFO L225 Difference]: With dead ends: 270770 [2021-11-09 08:32:51,074 INFO L226 Difference]: Without dead ends: 131233 [2021-11-09 08:32:51,143 INFO L786 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 [2021-11-09 08:32:51,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131233 states. [2021-11-09 08:32:53,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131233 to 131233. [2021-11-09 08:32:53,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131233 states, 131232 states have (on average 1.3623735064618385) internal successors, (178787), 131232 states have internal predecessors, (178787), 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)