./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3985cf9-5d77-4033-8a96-4c23aad207a4/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3985cf9-5d77-4033-8a96-4c23aad207a4/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3985cf9-5d77-4033-8a96-4c23aad207a4/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3985cf9-5d77-4033-8a96-4c23aad207a4/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3985cf9-5d77-4033-8a96-4c23aad207a4/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3985cf9-5d77-4033-8a96-4c23aad207a4/bin/uautomizer-AkOaLMaTGY --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 6fd1b86eb4bd4da10127873e4ddea09cb0ce3be9adebe9545b8e8b0c5a6a02d7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:51:53,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:51:53,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:51:53,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:51:53,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:51:53,062 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:51:53,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:51:53,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:51:53,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:51:53,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:51:53,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:51:53,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:51:53,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:51:53,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:51:53,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:51:53,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:51:53,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:51:53,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:51:53,097 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:51:53,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:51:53,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:51:53,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:51:53,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:51:53,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:51:53,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:51:53,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:51:53,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:51:53,126 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:51:53,127 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:51:53,128 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:51:53,130 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:51:53,131 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:51:53,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:51:53,134 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:51:53,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:51:53,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:51:53,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:51:53,137 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:51:53,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:51:53,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:51:53,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:51:53,140 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3985cf9-5d77-4033-8a96-4c23aad207a4/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:51:53,186 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:51:53,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:51:53,187 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:51:53,194 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:51:53,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:51:53,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:51:53,196 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:51:53,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:51:53,196 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:51:53,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:51:53,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:51:53,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:51:53,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:51:53,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:51:53,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:51:53,199 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:51:53,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:51:53,199 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:51:53,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:51:53,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:51:53,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:51:53,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:51:53,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:51:53,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:51:53,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:51:53,201 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:51:53,201 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:51:53,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:51:53,202 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:51:53,204 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:51:53,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:51:53,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:51:53,204 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_c3985cf9-5d77-4033-8a96-4c23aad207a4/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3985cf9-5d77-4033-8a96-4c23aad207a4/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6fd1b86eb4bd4da10127873e4ddea09cb0ce3be9adebe9545b8e8b0c5a6a02d7 [2021-11-07 07:51:53,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:51:53,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:51:53,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:51:53,546 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:51:53,547 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:51:53,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3985cf9-5d77-4033-8a96-4c23aad207a4/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-11-07 07:51:53,624 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3985cf9-5d77-4033-8a96-4c23aad207a4/bin/uautomizer-AkOaLMaTGY/data/b4362d354/c68773a8560d49dbadc43584f9e4b1de/FLAG972f2410b [2021-11-07 07:51:54,237 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:51:54,237 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3985cf9-5d77-4033-8a96-4c23aad207a4/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-11-07 07:51:54,250 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3985cf9-5d77-4033-8a96-4c23aad207a4/bin/uautomizer-AkOaLMaTGY/data/b4362d354/c68773a8560d49dbadc43584f9e4b1de/FLAG972f2410b [2021-11-07 07:51:54,533 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3985cf9-5d77-4033-8a96-4c23aad207a4/bin/uautomizer-AkOaLMaTGY/data/b4362d354/c68773a8560d49dbadc43584f9e4b1de [2021-11-07 07:51:54,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:51:54,537 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:51:54,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:51:54,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:51:54,549 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:51:54,550 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:51:54" (1/1) ... [2021-11-07 07:51:54,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12a171f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:54, skipping insertion in model container [2021-11-07 07:51:54,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:51:54" (1/1) ... [2021-11-07 07:51:54,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:51:54,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:51:54,896 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_c3985cf9-5d77-4033-8a96-4c23aad207a4/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7806,7819] [2021-11-07 07:51:54,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:51:54,952 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:51:55,014 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_c3985cf9-5d77-4033-8a96-4c23aad207a4/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7806,7819] [2021-11-07 07:51:55,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:51:55,064 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:51:55,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:55 WrapperNode [2021-11-07 07:51:55,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:51:55,066 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:51:55,068 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:51:55,068 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:51:55,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:55" (1/1) ... [2021-11-07 07:51:55,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:55" (1/1) ... [2021-11-07 07:51:55,142 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:51:55,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:51:55,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:51:55,144 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:51:55,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:55" (1/1) ... [2021-11-07 07:51:55,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:55" (1/1) ... [2021-11-07 07:51:55,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:55" (1/1) ... [2021-11-07 07:51:55,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:55" (1/1) ... [2021-11-07 07:51:55,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:55" (1/1) ... [2021-11-07 07:51:55,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:55" (1/1) ... [2021-11-07 07:51:55,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:55" (1/1) ... [2021-11-07 07:51:55,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:51:55,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:51:55,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:51:55,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:51:55,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:55" (1/1) ... [2021-11-07 07:51:55,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:51:55,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3985cf9-5d77-4033-8a96-4c23aad207a4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:55,241 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3985cf9-5d77-4033-8a96-4c23aad207a4/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:51:55,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3985cf9-5d77-4033-8a96-4c23aad207a4/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:51:55,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:51:55,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:51:55,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:51:55,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:51:56,114 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:51:56,125 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 07:51:56,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:51:56 BoogieIcfgContainer [2021-11-07 07:51:56,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:51:56,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:51:56,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:51:56,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:51:56,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:51:54" (1/3) ... [2021-11-07 07:51:56,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f45808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:51:56, skipping insertion in model container [2021-11-07 07:51:56,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:55" (2/3) ... [2021-11-07 07:51:56,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f45808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:51:56, skipping insertion in model container [2021-11-07 07:51:56,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:51:56" (3/3) ... [2021-11-07 07:51:56,142 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-11-07 07:51:56,148 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:51:56,148 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:51:56,202 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:51:56,209 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 [2021-11-07 07:51:56,210 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 07:51:56,233 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 147 states have (on average 1.7619047619047619) internal successors, (259), 148 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:56,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 07:51:56,244 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:56,245 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] [2021-11-07 07:51:56,246 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:56,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:56,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1468963440, now seen corresponding path program 1 times [2021-11-07 07:51:56,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:56,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568925526] [2021-11-07 07:51:56,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:56,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:56,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:56,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:56,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568925526] [2021-11-07 07:51:56,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568925526] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:56,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:56,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:51:56,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410347598] [2021-11-07 07:51:56,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:56,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:56,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:56,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:56,701 INFO L87 Difference]: Start difference. First operand has 149 states, 147 states have (on average 1.7619047619047619) internal successors, (259), 148 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:56,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:56,836 INFO L93 Difference]: Finished difference Result 311 states and 527 transitions. [2021-11-07 07:51:56,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:51:56,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-11-07 07:51:56,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:56,851 INFO L225 Difference]: With dead ends: 311 [2021-11-07 07:51:56,852 INFO L226 Difference]: Without dead ends: 213 [2021-11-07 07:51:56,855 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 [2021-11-07 07:51:56,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-07 07:51:56,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 211. [2021-11-07 07:51:56,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.5666666666666667) internal successors, (329), 210 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:56,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 329 transitions. [2021-11-07 07:51:56,916 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 329 transitions. Word has length 62 [2021-11-07 07:51:56,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:56,917 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 329 transitions. [2021-11-07 07:51:56,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:56,918 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 329 transitions. [2021-11-07 07:51:56,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 07:51:56,922 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:56,922 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] [2021-11-07 07:51:56,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:51:56,923 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:56,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:56,924 INFO L85 PathProgramCache]: Analyzing trace with hash -240910223, now seen corresponding path program 1 times [2021-11-07 07:51:56,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:56,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764837190] [2021-11-07 07:51:56,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:56,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:57,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:57,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764837190] [2021-11-07 07:51:57,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764837190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:57,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:57,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:51:57,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561765078] [2021-11-07 07:51:57,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:57,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:57,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:57,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:57,048 INFO L87 Difference]: Start difference. First operand 211 states and 329 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:57,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:57,093 INFO L93 Difference]: Finished difference Result 503 states and 809 transitions. [2021-11-07 07:51:57,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:51:57,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 07:51:57,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:57,098 INFO L225 Difference]: With dead ends: 503 [2021-11-07 07:51:57,098 INFO L226 Difference]: Without dead ends: 349 [2021-11-07 07:51:57,100 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 [2021-11-07 07:51:57,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-11-07 07:51:57,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 347. [2021-11-07 07:51:57,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.5953757225433527) internal successors, (552), 346 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:57,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 552 transitions. [2021-11-07 07:51:57,153 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 552 transitions. Word has length 64 [2021-11-07 07:51:57,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:57,154 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 552 transitions. [2021-11-07 07:51:57,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:57,155 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 552 transitions. [2021-11-07 07:51:57,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 07:51:57,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:57,159 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] [2021-11-07 07:51:57,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:51:57,159 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:57,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:57,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1851209774, now seen corresponding path program 1 times [2021-11-07 07:51:57,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:57,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109272172] [2021-11-07 07:51:57,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:57,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:57,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:57,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109272172] [2021-11-07 07:51:57,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109272172] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:57,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:57,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:51:57,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078565929] [2021-11-07 07:51:57,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:57,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:57,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:57,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:57,333 INFO L87 Difference]: Start difference. First operand 347 states and 552 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:57,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:57,393 INFO L93 Difference]: Finished difference Result 895 states and 1450 transitions. [2021-11-07 07:51:57,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:51:57,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 07:51:57,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:57,399 INFO L225 Difference]: With dead ends: 895 [2021-11-07 07:51:57,399 INFO L226 Difference]: Without dead ends: 605 [2021-11-07 07:51:57,401 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:57,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-11-07 07:51:57,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 603. [2021-11-07 07:51:57,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 1.6079734219269104) internal successors, (968), 602 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:57,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 968 transitions. [2021-11-07 07:51:57,458 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 968 transitions. Word has length 66 [2021-11-07 07:51:57,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:57,458 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 968 transitions. [2021-11-07 07:51:57,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:57,459 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 968 transitions. [2021-11-07 07:51:57,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 07:51:57,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:57,463 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] [2021-11-07 07:51:57,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:51:57,463 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:57,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:57,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1666116403, now seen corresponding path program 1 times [2021-11-07 07:51:57,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:57,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524921668] [2021-11-07 07:51:57,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:57,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:57,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:57,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524921668] [2021-11-07 07:51:57,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524921668] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:57,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:57,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:51:57,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090832903] [2021-11-07 07:51:57,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:51:57,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:57,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:51:57,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:51:57,618 INFO L87 Difference]: Start difference. First operand 603 states and 968 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:57,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:57,953 INFO L93 Difference]: Finished difference Result 3079 states and 5038 transitions. [2021-11-07 07:51:57,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:51:57,954 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 07:51:57,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:57,976 INFO L225 Difference]: With dead ends: 3079 [2021-11-07 07:51:57,976 INFO L226 Difference]: Without dead ends: 2533 [2021-11-07 07:51:57,984 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:51:57,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-11-07 07:51:58,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 1131. [2021-11-07 07:51:58,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 1.6176991150442477) internal successors, (1828), 1130 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:58,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1828 transitions. [2021-11-07 07:51:58,079 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1828 transitions. Word has length 68 [2021-11-07 07:51:58,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:58,080 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 1828 transitions. [2021-11-07 07:51:58,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:58,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1828 transitions. [2021-11-07 07:51:58,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 07:51:58,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:58,091 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] [2021-11-07 07:51:58,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:51:58,091 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:58,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:58,093 INFO L85 PathProgramCache]: Analyzing trace with hash 47496755, now seen corresponding path program 1 times [2021-11-07 07:51:58,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:58,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323843521] [2021-11-07 07:51:58,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:58,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:58,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:58,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323843521] [2021-11-07 07:51:58,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323843521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:58,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:58,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:51:58,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303733395] [2021-11-07 07:51:58,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:51:58,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:58,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:51:58,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:51:58,219 INFO L87 Difference]: Start difference. First operand 1131 states and 1828 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:58,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:58,464 INFO L93 Difference]: Finished difference Result 4121 states and 6711 transitions. [2021-11-07 07:51:58,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:51:58,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 07:51:58,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:58,488 INFO L225 Difference]: With dead ends: 4121 [2021-11-07 07:51:58,488 INFO L226 Difference]: Without dead ends: 3047 [2021-11-07 07:51:58,491 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 [2021-11-07 07:51:58,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3047 states. [2021-11-07 07:51:58,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3047 to 2080. [2021-11-07 07:51:58,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 1.618085618085618) internal successors, (3364), 2079 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:58,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 3364 transitions. [2021-11-07 07:51:58,658 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 3364 transitions. Word has length 69 [2021-11-07 07:51:58,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:58,659 INFO L470 AbstractCegarLoop]: Abstraction has 2080 states and 3364 transitions. [2021-11-07 07:51:58,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:58,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 3364 transitions. [2021-11-07 07:51:58,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 07:51:58,663 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:58,664 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] [2021-11-07 07:51:58,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 07:51:58,664 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:58,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:58,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1156873170, now seen corresponding path program 1 times [2021-11-07 07:51:58,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:58,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807946101] [2021-11-07 07:51:58,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:58,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:58,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:58,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807946101] [2021-11-07 07:51:58,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807946101] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:58,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:58,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:51:58,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142570514] [2021-11-07 07:51:58,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:58,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:58,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:58,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:58,809 INFO L87 Difference]: Start difference. First operand 2080 states and 3364 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:58,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:58,999 INFO L93 Difference]: Finished difference Result 4970 states and 8089 transitions. [2021-11-07 07:51:59,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:51:59,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 07:51:59,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:59,025 INFO L225 Difference]: With dead ends: 4970 [2021-11-07 07:51:59,025 INFO L226 Difference]: Without dead ends: 2947 [2021-11-07 07:51:59,029 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 [2021-11-07 07:51:59,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2021-11-07 07:51:59,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2945. [2021-11-07 07:51:59,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2945 states, 2944 states have (on average 1.6246603260869565) internal successors, (4783), 2944 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:59,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2945 states to 2945 states and 4783 transitions. [2021-11-07 07:51:59,236 INFO L78 Accepts]: Start accepts. Automaton has 2945 states and 4783 transitions. Word has length 70 [2021-11-07 07:51:59,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:59,237 INFO L470 AbstractCegarLoop]: Abstraction has 2945 states and 4783 transitions. [2021-11-07 07:51:59,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:59,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2945 states and 4783 transitions. [2021-11-07 07:51:59,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 07:51:59,239 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:59,239 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] [2021-11-07 07:51:59,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 07:51:59,240 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:59,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:59,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1843763252, now seen corresponding path program 1 times [2021-11-07 07:51:59,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:59,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043478358] [2021-11-07 07:51:59,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:59,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:59,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:59,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043478358] [2021-11-07 07:51:59,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043478358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:59,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:59,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:51:59,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224116750] [2021-11-07 07:51:59,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:59,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:59,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:59,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:59,308 INFO L87 Difference]: Start difference. First operand 2945 states and 4783 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:59,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:59,534 INFO L93 Difference]: Finished difference Result 5677 states and 9250 transitions. [2021-11-07 07:51:59,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:51:59,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 07:51:59,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:59,559 INFO L225 Difference]: With dead ends: 5677 [2021-11-07 07:51:59,559 INFO L226 Difference]: Without dead ends: 4055 [2021-11-07 07:51:59,562 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 [2021-11-07 07:51:59,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4055 states. [2021-11-07 07:51:59,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4055 to 4053. [2021-11-07 07:51:59,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4053 states, 4052 states have (on average 1.6187068114511352) internal successors, (6559), 4052 states have internal predecessors, (6559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:59,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 6559 transitions. [2021-11-07 07:51:59,793 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 6559 transitions. Word has length 70 [2021-11-07 07:51:59,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:59,793 INFO L470 AbstractCegarLoop]: Abstraction has 4053 states and 6559 transitions. [2021-11-07 07:51:59,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:59,794 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 6559 transitions. [2021-11-07 07:51:59,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 07:51:59,800 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:59,801 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] [2021-11-07 07:51:59,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 07:51:59,801 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:59,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:59,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1414453242, now seen corresponding path program 1 times [2021-11-07 07:51:59,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:59,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772343685] [2021-11-07 07:51:59,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:59,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:59,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:59,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772343685] [2021-11-07 07:51:59,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772343685] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:59,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:59,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:51:59,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671940979] [2021-11-07 07:51:59,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:51:59,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:59,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:51:59,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:51:59,912 INFO L87 Difference]: Start difference. First operand 4053 states and 6559 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:00,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:00,440 INFO L93 Difference]: Finished difference Result 12839 states and 20847 transitions. [2021-11-07 07:52:00,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:52:00,441 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 07:52:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:00,495 INFO L225 Difference]: With dead ends: 12839 [2021-11-07 07:52:00,495 INFO L226 Difference]: Without dead ends: 8861 [2021-11-07 07:52:00,503 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 [2021-11-07 07:52:00,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8861 states. [2021-11-07 07:52:00,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8861 to 6434. [2021-11-07 07:52:00,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6434 states, 6433 states have (on average 1.61168972485621) internal successors, (10368), 6433 states have internal predecessors, (10368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:00,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6434 states to 6434 states and 10368 transitions. [2021-11-07 07:52:00,952 INFO L78 Accepts]: Start accepts. Automaton has 6434 states and 10368 transitions. Word has length 70 [2021-11-07 07:52:00,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:00,953 INFO L470 AbstractCegarLoop]: Abstraction has 6434 states and 10368 transitions. [2021-11-07 07:52:00,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:00,953 INFO L276 IsEmpty]: Start isEmpty. Operand 6434 states and 10368 transitions. [2021-11-07 07:52:00,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 07:52:00,954 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:00,955 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] [2021-11-07 07:52:00,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 07:52:00,955 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:00,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:00,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1510229994, now seen corresponding path program 1 times [2021-11-07 07:52:00,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:00,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222331850] [2021-11-07 07:52:00,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:00,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:01,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:01,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222331850] [2021-11-07 07:52:01,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222331850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:01,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:01,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:52:01,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677048044] [2021-11-07 07:52:01,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:52:01,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:01,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:52:01,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:52:01,013 INFO L87 Difference]: Start difference. First operand 6434 states and 10368 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:01,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:01,526 INFO L93 Difference]: Finished difference Result 12442 states and 20091 transitions. [2021-11-07 07:52:01,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:52:01,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 07:52:01,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:01,576 INFO L225 Difference]: With dead ends: 12442 [2021-11-07 07:52:01,576 INFO L226 Difference]: Without dead ends: 8786 [2021-11-07 07:52:01,583 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 [2021-11-07 07:52:01,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8786 states. [2021-11-07 07:52:02,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8786 to 8784. [2021-11-07 07:52:02,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8784 states, 8783 states have (on average 1.6019583285893202) internal successors, (14070), 8783 states have internal predecessors, (14070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:02,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8784 states to 8784 states and 14070 transitions. [2021-11-07 07:52:02,244 INFO L78 Accepts]: Start accepts. Automaton has 8784 states and 14070 transitions. Word has length 70 [2021-11-07 07:52:02,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:02,244 INFO L470 AbstractCegarLoop]: Abstraction has 8784 states and 14070 transitions. [2021-11-07 07:52:02,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 8784 states and 14070 transitions. [2021-11-07 07:52:02,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 07:52:02,247 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:02,247 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] [2021-11-07 07:52:02,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 07:52:02,247 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:02,248 INFO L85 PathProgramCache]: Analyzing trace with hash 844989402, now seen corresponding path program 1 times [2021-11-07 07:52:02,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:02,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483065573] [2021-11-07 07:52:02,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:02,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:02,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:02,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483065573] [2021-11-07 07:52:02,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483065573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:02,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:02,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:52:02,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297996589] [2021-11-07 07:52:02,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:52:02,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:02,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:52:02,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:52:02,324 INFO L87 Difference]: Start difference. First operand 8784 states and 14070 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:03,309 INFO L93 Difference]: Finished difference Result 27681 states and 44433 transitions. [2021-11-07 07:52:03,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:52:03,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 07:52:03,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:03,382 INFO L225 Difference]: With dead ends: 27681 [2021-11-07 07:52:03,382 INFO L226 Difference]: Without dead ends: 18988 [2021-11-07 07:52:03,402 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 [2021-11-07 07:52:03,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18988 states. [2021-11-07 07:52:04,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18988 to 13833. [2021-11-07 07:52:04,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13833 states, 13832 states have (on average 1.5921775592828225) internal successors, (22023), 13832 states have internal predecessors, (22023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:04,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13833 states to 13833 states and 22023 transitions. [2021-11-07 07:52:04,375 INFO L78 Accepts]: Start accepts. Automaton has 13833 states and 22023 transitions. Word has length 71 [2021-11-07 07:52:04,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:04,376 INFO L470 AbstractCegarLoop]: Abstraction has 13833 states and 22023 transitions. [2021-11-07 07:52:04,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:04,376 INFO L276 IsEmpty]: Start isEmpty. Operand 13833 states and 22023 transitions. [2021-11-07 07:52:04,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 07:52:04,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:04,378 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] [2021-11-07 07:52:04,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 07:52:04,379 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:04,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:04,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1231314837, now seen corresponding path program 1 times [2021-11-07 07:52:04,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:04,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054947928] [2021-11-07 07:52:04,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:04,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:04,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:04,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054947928] [2021-11-07 07:52:04,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054947928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:04,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:04,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:52:04,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270073241] [2021-11-07 07:52:04,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:52:04,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:04,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:52:04,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:52:04,544 INFO L87 Difference]: Start difference. First operand 13833 states and 22023 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:05,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:05,465 INFO L93 Difference]: Finished difference Result 27577 states and 43922 transitions. [2021-11-07 07:52:05,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:52:05,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-07 07:52:05,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:05,510 INFO L225 Difference]: With dead ends: 27577 [2021-11-07 07:52:05,510 INFO L226 Difference]: Without dead ends: 13835 [2021-11-07 07:52:05,531 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:52:05,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13835 states. [2021-11-07 07:52:06,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13835 to 13833. [2021-11-07 07:52:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13833 states, 13832 states have (on average 1.5813331405436668) internal successors, (21873), 13832 states have internal predecessors, (21873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13833 states to 13833 states and 21873 transitions. [2021-11-07 07:52:06,223 INFO L78 Accepts]: Start accepts. Automaton has 13833 states and 21873 transitions. Word has length 73 [2021-11-07 07:52:06,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:06,224 INFO L470 AbstractCegarLoop]: Abstraction has 13833 states and 21873 transitions. [2021-11-07 07:52:06,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:06,224 INFO L276 IsEmpty]: Start isEmpty. Operand 13833 states and 21873 transitions. [2021-11-07 07:52:06,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 07:52:06,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:06,225 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] [2021-11-07 07:52:06,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 07:52:06,226 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:06,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:06,227 INFO L85 PathProgramCache]: Analyzing trace with hash -833180180, now seen corresponding path program 1 times [2021-11-07 07:52:06,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:06,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300960777] [2021-11-07 07:52:06,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:06,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:06,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:06,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300960777] [2021-11-07 07:52:06,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300960777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:06,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:06,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:52:06,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544066296] [2021-11-07 07:52:06,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:52:06,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:06,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:52:06,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:52:06,337 INFO L87 Difference]: Start difference. First operand 13833 states and 21873 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:07,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:07,552 INFO L93 Difference]: Finished difference Result 39890 states and 63222 transitions. [2021-11-07 07:52:07,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:52:07,553 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-11-07 07:52:07,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:07,636 INFO L225 Difference]: With dead ends: 39890 [2021-11-07 07:52:07,636 INFO L226 Difference]: Without dead ends: 26148 [2021-11-07 07:52:07,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:52:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26148 states. [2021-11-07 07:52:09,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26148 to 26146. [2021-11-07 07:52:09,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26146 states, 26145 states have (on average 1.5704341174220693) internal successors, (41059), 26145 states have internal predecessors, (41059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:09,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26146 states to 26146 states and 41059 transitions. [2021-11-07 07:52:09,426 INFO L78 Accepts]: Start accepts. Automaton has 26146 states and 41059 transitions. Word has length 76 [2021-11-07 07:52:09,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:09,427 INFO L470 AbstractCegarLoop]: Abstraction has 26146 states and 41059 transitions. [2021-11-07 07:52:09,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:09,427 INFO L276 IsEmpty]: Start isEmpty. Operand 26146 states and 41059 transitions. [2021-11-07 07:52:09,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 07:52:09,428 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:09,429 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] [2021-11-07 07:52:09,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 07:52:09,430 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:09,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:09,431 INFO L85 PathProgramCache]: Analyzing trace with hash -60691096, now seen corresponding path program 1 times [2021-11-07 07:52:09,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:09,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157585784] [2021-11-07 07:52:09,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:09,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:09,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:09,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157585784] [2021-11-07 07:52:09,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157585784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:09,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:09,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:52:09,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086145336] [2021-11-07 07:52:09,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:52:09,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:09,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:52:09,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:52:09,562 INFO L87 Difference]: Start difference. First operand 26146 states and 41059 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:11,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:11,608 INFO L93 Difference]: Finished difference Result 52447 states and 81975 transitions. [2021-11-07 07:52:11,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:52:11,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 07:52:11,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:11,748 INFO L225 Difference]: With dead ends: 52447 [2021-11-07 07:52:11,748 INFO L226 Difference]: Without dead ends: 52445 [2021-11-07 07:52:11,769 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:52:11,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52445 states. [2021-11-07 07:52:14,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52445 to 26920. [2021-11-07 07:52:14,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26920 states, 26919 states have (on average 1.553698131431331) internal successors, (41824), 26919 states have internal predecessors, (41824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:14,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26920 states to 26920 states and 41824 transitions. [2021-11-07 07:52:14,114 INFO L78 Accepts]: Start accepts. Automaton has 26920 states and 41824 transitions. Word has length 77 [2021-11-07 07:52:14,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:14,115 INFO L470 AbstractCegarLoop]: Abstraction has 26920 states and 41824 transitions. [2021-11-07 07:52:14,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:14,115 INFO L276 IsEmpty]: Start isEmpty. Operand 26920 states and 41824 transitions. [2021-11-07 07:52:14,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 07:52:14,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:14,118 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:14,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 07:52:14,119 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:14,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:14,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1256747651, now seen corresponding path program 1 times [2021-11-07 07:52:14,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:14,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705682398] [2021-11-07 07:52:14,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:14,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:52:14,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:14,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705682398] [2021-11-07 07:52:14,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705682398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:14,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:14,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:52:14,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391366883] [2021-11-07 07:52:14,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:52:14,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:14,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:52:14,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:52:14,203 INFO L87 Difference]: Start difference. First operand 26920 states and 41824 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:17,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:17,650 INFO L93 Difference]: Finished difference Result 70172 states and 109184 transitions. [2021-11-07 07:52:17,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:52:17,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 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 101 [2021-11-07 07:52:17,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:17,766 INFO L225 Difference]: With dead ends: 70172 [2021-11-07 07:52:17,766 INFO L226 Difference]: Without dead ends: 54605 [2021-11-07 07:52:17,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:52:17,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54605 states. [2021-11-07 07:52:20,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54605 to 41816. [2021-11-07 07:52:20,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41816 states, 41815 states have (on average 1.5512615090278608) internal successors, (64866), 41815 states have internal predecessors, (64866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:20,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41816 states to 41816 states and 64866 transitions. [2021-11-07 07:52:20,762 INFO L78 Accepts]: Start accepts. Automaton has 41816 states and 64866 transitions. Word has length 101 [2021-11-07 07:52:20,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:20,762 INFO L470 AbstractCegarLoop]: Abstraction has 41816 states and 64866 transitions. [2021-11-07 07:52:20,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:20,763 INFO L276 IsEmpty]: Start isEmpty. Operand 41816 states and 64866 transitions. [2021-11-07 07:52:20,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 07:52:20,766 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:20,766 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:20,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 07:52:20,767 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:20,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:20,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1943637733, now seen corresponding path program 1 times [2021-11-07 07:52:20,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:20,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623818863] [2021-11-07 07:52:20,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:20,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 07:52:20,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:20,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623818863] [2021-11-07 07:52:20,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623818863] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:20,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:20,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:52:20,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473236921] [2021-11-07 07:52:20,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:52:20,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:20,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:52:20,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:52:20,842 INFO L87 Difference]: Start difference. First operand 41816 states and 64866 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:24,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:24,450 INFO L93 Difference]: Finished difference Result 76827 states and 119616 transitions. [2021-11-07 07:52:24,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:52:24,450 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 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 101 [2021-11-07 07:52:24,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:24,562 INFO L225 Difference]: With dead ends: 76827 [2021-11-07 07:52:24,562 INFO L226 Difference]: Without dead ends: 64509 [2021-11-07 07:52:24,580 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:52:24,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64509 states. [2021-11-07 07:52:28,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64509 to 58325. [2021-11-07 07:52:28,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58325 states, 58324 states have (on average 1.5503737740895687) internal successors, (90424), 58324 states have internal predecessors, (90424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:28,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58325 states to 58325 states and 90424 transitions. [2021-11-07 07:52:28,516 INFO L78 Accepts]: Start accepts. Automaton has 58325 states and 90424 transitions. Word has length 101 [2021-11-07 07:52:28,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:28,517 INFO L470 AbstractCegarLoop]: Abstraction has 58325 states and 90424 transitions. [2021-11-07 07:52:28,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:28,517 INFO L276 IsEmpty]: Start isEmpty. Operand 58325 states and 90424 transitions. [2021-11-07 07:52:28,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 07:52:28,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:28,520 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:28,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 07:52:28,520 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:28,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:28,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1410355513, now seen corresponding path program 1 times [2021-11-07 07:52:28,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:28,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044413550] [2021-11-07 07:52:28,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:28,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 07:52:28,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:28,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044413550] [2021-11-07 07:52:28,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044413550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:28,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:28,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:52:28,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416054717] [2021-11-07 07:52:28,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:52:28,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:28,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:52:28,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:52:28,596 INFO L87 Difference]: Start difference. First operand 58325 states and 90424 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:32,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:32,742 INFO L93 Difference]: Finished difference Result 81715 states and 127240 transitions. [2021-11-07 07:52:32,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:52:32,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-07 07:52:32,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:32,872 INFO L225 Difference]: With dead ends: 81715 [2021-11-07 07:52:32,872 INFO L226 Difference]: Without dead ends: 69397 [2021-11-07 07:52:32,895 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:52:32,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69397 states. [2021-11-07 07:52:37,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69397 to 66939. [2021-11-07 07:52:37,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66939 states, 66938 states have (on average 1.5520631031700978) internal successors, (103892), 66938 states have internal predecessors, (103892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:37,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66939 states to 66939 states and 103892 transitions. [2021-11-07 07:52:37,383 INFO L78 Accepts]: Start accepts. Automaton has 66939 states and 103892 transitions. Word has length 101 [2021-11-07 07:52:37,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:37,383 INFO L470 AbstractCegarLoop]: Abstraction has 66939 states and 103892 transitions. [2021-11-07 07:52:37,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:37,384 INFO L276 IsEmpty]: Start isEmpty. Operand 66939 states and 103892 transitions. [2021-11-07 07:52:37,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 07:52:37,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:37,388 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:37,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 07:52:37,389 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:37,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:37,389 INFO L85 PathProgramCache]: Analyzing trace with hash -366975703, now seen corresponding path program 1 times [2021-11-07 07:52:37,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:37,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262913544] [2021-11-07 07:52:37,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:37,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:52:37,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:37,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262913544] [2021-11-07 07:52:37,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262913544] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:37,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:37,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:52:37,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271987042] [2021-11-07 07:52:37,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:52:37,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:37,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:52:37,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:52:37,456 INFO L87 Difference]: Start difference. First operand 66939 states and 103892 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)