./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.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_317f72a7-fc4b-467a-9ec3-cc74f7780ed8/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317f72a7-fc4b-467a-9ec3-cc74f7780ed8/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_317f72a7-fc4b-467a-9ec3-cc74f7780ed8/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317f72a7-fc4b-467a-9ec3-cc74f7780ed8/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317f72a7-fc4b-467a-9ec3-cc74f7780ed8/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_317f72a7-fc4b-467a-9ec3-cc74f7780ed8/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 8ed4163e8f042a84d9cdccd4fee3ee0ba89fdce83cd991779acec4a51d9a650c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:34:02,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:34:02,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:34:02,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:34:02,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:34:02,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:34:02,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:34:02,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:34:02,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:34:03,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:34:03,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:34:03,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:34:03,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:34:03,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:34:03,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:34:03,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:34:03,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:34:03,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:34:03,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:34:03,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:34:03,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:34:03,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:34:03,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:34:03,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:34:03,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:34:03,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:34:03,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:34:03,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:34:03,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:34:03,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:34:03,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:34:03,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:34:03,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:34:03,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:34:03,065 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:34:03,069 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:34:03,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:34:03,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:34:03,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:34:03,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:34:03,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:34:03,075 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317f72a7-fc4b-467a-9ec3-cc74f7780ed8/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:34:03,120 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:34:03,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:34:03,121 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:34:03,121 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:34:03,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:34:03,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:34:03,123 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:34:03,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:34:03,124 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:34:03,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:34:03,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:34:03,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:34:03,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:34:03,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:34:03,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:34:03,126 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:34:03,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:34:03,126 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:34:03,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:34:03,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:34:03,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:34:03,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:34:03,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:34:03,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:34:03,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:34:03,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:34:03,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:34:03,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:34:03,129 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:34:03,129 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:34:03,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:34:03,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:34:03,130 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_317f72a7-fc4b-467a-9ec3-cc74f7780ed8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317f72a7-fc4b-467a-9ec3-cc74f7780ed8/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ed4163e8f042a84d9cdccd4fee3ee0ba89fdce83cd991779acec4a51d9a650c [2021-11-07 07:34:03,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:34:03,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:34:03,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:34:03,473 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:34:03,474 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:34:03,475 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317f72a7-fc4b-467a-9ec3-cc74f7780ed8/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c [2021-11-07 07:34:03,547 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317f72a7-fc4b-467a-9ec3-cc74f7780ed8/bin/uautomizer-AkOaLMaTGY/data/21812b421/d127018f33e44eb7a52bcd37562e1197/FLAG3b9011058 [2021-11-07 07:34:04,243 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:34:04,244 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317f72a7-fc4b-467a-9ec3-cc74f7780ed8/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c [2021-11-07 07:34:04,292 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317f72a7-fc4b-467a-9ec3-cc74f7780ed8/bin/uautomizer-AkOaLMaTGY/data/21812b421/d127018f33e44eb7a52bcd37562e1197/FLAG3b9011058 [2021-11-07 07:34:04,417 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317f72a7-fc4b-467a-9ec3-cc74f7780ed8/bin/uautomizer-AkOaLMaTGY/data/21812b421/d127018f33e44eb7a52bcd37562e1197 [2021-11-07 07:34:04,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:34:04,427 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:34:04,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:34:04,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:34:04,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:34:04,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:34:04" (1/1) ... [2021-11-07 07:34:04,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12724360 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:04, skipping insertion in model container [2021-11-07 07:34:04,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:34:04" (1/1) ... [2021-11-07 07:34:04,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:34:04,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:34:05,211 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_317f72a7-fc4b-467a-9ec3-cc74f7780ed8/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2021-11-07 07:34:05,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:34:05,225 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:34:05,346 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_317f72a7-fc4b-467a-9ec3-cc74f7780ed8/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2021-11-07 07:34:05,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:34:05,375 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:34:05,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:05 WrapperNode [2021-11-07 07:34:05,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:34:05,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:34:05,378 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:34:05,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:34:05,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:05" (1/1) ... [2021-11-07 07:34:05,429 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:05" (1/1) ... [2021-11-07 07:34:05,789 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:34:05,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:34:05,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:34:05,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:34:05,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:05" (1/1) ... [2021-11-07 07:34:05,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:05" (1/1) ... [2021-11-07 07:34:05,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:05" (1/1) ... [2021-11-07 07:34:05,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:05" (1/1) ... [2021-11-07 07:34:06,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:05" (1/1) ... [2021-11-07 07:34:06,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:05" (1/1) ... [2021-11-07 07:34:06,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:05" (1/1) ... [2021-11-07 07:34:06,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:34:06,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:34:06,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:34:06,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:34:06,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:05" (1/1) ... [2021-11-07 07:34:06,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:34:06,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317f72a7-fc4b-467a-9ec3-cc74f7780ed8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:06,551 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317f72a7-fc4b-467a-9ec3-cc74f7780ed8/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:34:06,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317f72a7-fc4b-467a-9ec3-cc74f7780ed8/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:34:06,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:34:06,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:34:06,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:34:06,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:34:17,116 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:34:17,117 INFO L299 CfgBuilder]: Removed 1143 assume(true) statements. [2021-11-07 07:34:17,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:34:17 BoogieIcfgContainer [2021-11-07 07:34:17,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:34:17,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:34:17,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:34:17,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:34:17,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:34:04" (1/3) ... [2021-11-07 07:34:17,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2583d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:34:17, skipping insertion in model container [2021-11-07 07:34:17,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:05" (2/3) ... [2021-11-07 07:34:17,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2583d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:34:17, skipping insertion in model container [2021-11-07 07:34:17,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:34:17" (3/3) ... [2021-11-07 07:34:17,143 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product03.cil.c [2021-11-07 07:34:17,154 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:34:17,155 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 07:34:17,292 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:34:17,303 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 07:34:17,303 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 07:34:17,449 INFO L276 IsEmpty]: Start isEmpty. Operand has 5427 states, 5421 states have (on average 1.8989116399188342) internal successors, (10294), 5426 states have internal predecessors, (10294), 0 states have call successors, (0), 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 07:34:17,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 07:34:17,483 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:17,484 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] [2021-11-07 07:34:17,484 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 07:34:17,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:17,491 INFO L85 PathProgramCache]: Analyzing trace with hash 770856702, now seen corresponding path program 1 times [2021-11-07 07:34:17,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:17,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582703885] [2021-11-07 07:34:17,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:17,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:18,018 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 07:34:18,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:18,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582703885] [2021-11-07 07:34:18,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582703885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:18,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:18,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:34:18,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293604370] [2021-11-07 07:34:18,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:34:18,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:18,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:34:18,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:34:18,070 INFO L87 Difference]: Start difference. First operand has 5427 states, 5421 states have (on average 1.8989116399188342) internal successors, (10294), 5426 states have internal predecessors, (10294), 0 states have call successors, (0), 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 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 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 07:34:18,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:18,606 INFO L93 Difference]: Finished difference Result 13046 states and 24746 transitions. [2021-11-07 07:34:18,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:34:18,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-11-07 07:34:18,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:18,699 INFO L225 Difference]: With dead ends: 13046 [2021-11-07 07:34:18,700 INFO L226 Difference]: Without dead ends: 7623 [2021-11-07 07:34:18,721 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 07:34:18,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7623 states. [2021-11-07 07:34:18,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7623 to 5423. [2021-11-07 07:34:18,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5423 states, 5418 states have (on average 1.8962716869693614) internal successors, (10274), 5422 states have internal predecessors, (10274), 0 states have call successors, (0), 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 07:34:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5423 states to 5423 states and 10274 transitions. [2021-11-07 07:34:19,025 INFO L78 Accepts]: Start accepts. Automaton has 5423 states and 10274 transitions. Word has length 44 [2021-11-07 07:34:19,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:19,025 INFO L470 AbstractCegarLoop]: Abstraction has 5423 states and 10274 transitions. [2021-11-07 07:34:19,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 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 07:34:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand 5423 states and 10274 transitions. [2021-11-07 07:34:19,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 07:34:19,032 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:19,032 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] [2021-11-07 07:34:19,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:34:19,033 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 07:34:19,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:19,036 INFO L85 PathProgramCache]: Analyzing trace with hash 190982898, now seen corresponding path program 1 times [2021-11-07 07:34:19,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:19,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943588201] [2021-11-07 07:34:19,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:19,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:19,200 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 07:34:19,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:19,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943588201] [2021-11-07 07:34:19,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943588201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:19,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:19,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 07:34:19,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727805477] [2021-11-07 07:34:19,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:34:19,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:19,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:34:19,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:34:19,206 INFO L87 Difference]: Start difference. First operand 5423 states and 10274 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 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 07:34:20,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:20,171 INFO L93 Difference]: Finished difference Result 15156 states and 28716 transitions. [2021-11-07 07:34:20,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:34:20,172 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2021-11-07 07:34:20,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:20,246 INFO L225 Difference]: With dead ends: 15156 [2021-11-07 07:34:20,247 INFO L226 Difference]: Without dead ends: 9775 [2021-11-07 07:34:20,257 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:34:20,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9775 states. [2021-11-07 07:34:20,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9775 to 5419. [2021-11-07 07:34:20,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5419 states, 5414 states have (on average 1.8956409309198374) internal successors, (10263), 5418 states have internal predecessors, (10263), 0 states have call successors, (0), 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 07:34:20,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 10263 transitions. [2021-11-07 07:34:20,577 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 10263 transitions. Word has length 49 [2021-11-07 07:34:20,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:20,578 INFO L470 AbstractCegarLoop]: Abstraction has 5419 states and 10263 transitions. [2021-11-07 07:34:20,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 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 07:34:20,579 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 10263 transitions. [2021-11-07 07:34:20,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 07:34:20,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:20,585 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] [2021-11-07 07:34:20,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:34:20,587 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 07:34:20,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:20,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1439760622, now seen corresponding path program 1 times [2021-11-07 07:34:20,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:20,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889853002] [2021-11-07 07:34:20,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:20,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:20,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:20,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889853002] [2021-11-07 07:34:20,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889853002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:20,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:20,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:34:20,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223645904] [2021-11-07 07:34:20,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:34:20,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:20,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:34:20,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:34:20,768 INFO L87 Difference]: Start difference. First operand 5419 states and 10263 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 07:34:21,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:21,630 INFO L93 Difference]: Finished difference Result 17318 states and 32802 transitions. [2021-11-07 07:34:21,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:34:21,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-11-07 07:34:21,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:21,706 INFO L225 Difference]: With dead ends: 17318 [2021-11-07 07:34:21,706 INFO L226 Difference]: Without dead ends: 11941 [2021-11-07 07:34:21,717 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 07:34:21,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11941 states. [2021-11-07 07:34:21,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11941 to 5419. [2021-11-07 07:34:21,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5419 states, 5414 states have (on average 1.8949021056520132) internal successors, (10259), 5418 states have internal predecessors, (10259), 0 states have call successors, (0), 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 07:34:21,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 10259 transitions. [2021-11-07 07:34:21,996 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 10259 transitions. Word has length 50 [2021-11-07 07:34:21,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:21,997 INFO L470 AbstractCegarLoop]: Abstraction has 5419 states and 10259 transitions. [2021-11-07 07:34:21,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 07:34:21,998 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 10259 transitions. [2021-11-07 07:34:22,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 07:34:22,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:22,001 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] [2021-11-07 07:34:22,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:34:22,002 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 07:34:22,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:22,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1257133717, now seen corresponding path program 1 times [2021-11-07 07:34:22,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:22,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095502713] [2021-11-07 07:34:22,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:22,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:22,081 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 07:34:22,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:22,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095502713] [2021-11-07 07:34:22,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095502713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:22,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:22,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:34:22,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692632787] [2021-11-07 07:34:22,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:34:22,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:22,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:34:22,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:34:22,085 INFO L87 Difference]: Start difference. First operand 5419 states and 10259 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 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 07:34:22,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:22,734 INFO L93 Difference]: Finished difference Result 12990 states and 24606 transitions. [2021-11-07 07:34:22,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:34:22,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-11-07 07:34:22,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:22,760 INFO L225 Difference]: With dead ends: 12990 [2021-11-07 07:34:22,761 INFO L226 Difference]: Without dead ends: 7613 [2021-11-07 07:34:22,770 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 07:34:22,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7613 states. [2021-11-07 07:34:23,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7613 to 5419. [2021-11-07 07:34:23,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5419 states, 5414 states have (on average 1.893239748799409) internal successors, (10250), 5418 states have internal predecessors, (10250), 0 states have call successors, (0), 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 07:34:23,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 10250 transitions. [2021-11-07 07:34:23,075 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 10250 transitions. Word has length 51 [2021-11-07 07:34:23,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:23,076 INFO L470 AbstractCegarLoop]: Abstraction has 5419 states and 10250 transitions. [2021-11-07 07:34:23,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 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 07:34:23,077 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 10250 transitions. [2021-11-07 07:34:23,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 07:34:23,080 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:23,080 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] [2021-11-07 07:34:23,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:34:23,081 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 07:34:23,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:23,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1001017801, now seen corresponding path program 1 times [2021-11-07 07:34:23,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:23,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164310334] [2021-11-07 07:34:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:23,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:23,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:23,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164310334] [2021-11-07 07:34:23,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164310334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:23,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:23,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:34:23,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656929524] [2021-11-07 07:34:23,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:34:23,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:23,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:34:23,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:34:23,218 INFO L87 Difference]: Start difference. First operand 5419 states and 10250 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 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 07:34:23,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:23,920 INFO L93 Difference]: Finished difference Result 12990 states and 24588 transitions. [2021-11-07 07:34:23,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:34:23,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-11-07 07:34:23,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:23,948 INFO L225 Difference]: With dead ends: 12990 [2021-11-07 07:34:23,948 INFO L226 Difference]: Without dead ends: 7613 [2021-11-07 07:34:23,958 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 07:34:23,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7613 states. [2021-11-07 07:34:24,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7613 to 5419. [2021-11-07 07:34:24,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5419 states, 5414 states have (on average 1.8915773919468046) internal successors, (10241), 5418 states have internal predecessors, (10241), 0 states have call successors, (0), 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 07:34:24,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 10241 transitions. [2021-11-07 07:34:24,234 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 10241 transitions. Word has length 52 [2021-11-07 07:34:24,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:24,235 INFO L470 AbstractCegarLoop]: Abstraction has 5419 states and 10241 transitions. [2021-11-07 07:34:24,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 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 07:34:24,235 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 10241 transitions. [2021-11-07 07:34:24,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 07:34:24,239 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:24,240 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] [2021-11-07 07:34:24,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 07:34:24,241 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 07:34:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:24,241 INFO L85 PathProgramCache]: Analyzing trace with hash -909735241, now seen corresponding path program 1 times [2021-11-07 07:34:24,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:24,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345383523] [2021-11-07 07:34:24,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:24,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:24,363 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 07:34:24,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:24,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345383523] [2021-11-07 07:34:24,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345383523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:24,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:24,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:34:24,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041967165] [2021-11-07 07:34:24,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:34:24,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:24,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:34:24,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:34:24,374 INFO L87 Difference]: Start difference. First operand 5419 states and 10241 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 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 07:34:24,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:24,906 INFO L93 Difference]: Finished difference Result 15133 states and 28630 transitions. [2021-11-07 07:34:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:34:24,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-11-07 07:34:24,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:24,936 INFO L225 Difference]: With dead ends: 15133 [2021-11-07 07:34:24,936 INFO L226 Difference]: Without dead ends: 9735 [2021-11-07 07:34:24,944 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:34:24,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9735 states. [2021-11-07 07:34:25,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9735 to 5401. [2021-11-07 07:34:25,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5401 states, 5396 states have (on average 1.8921423276501113) internal successors, (10210), 5400 states have internal predecessors, (10210), 0 states have call successors, (0), 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 07:34:25,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5401 states to 5401 states and 10210 transitions. [2021-11-07 07:34:25,158 INFO L78 Accepts]: Start accepts. Automaton has 5401 states and 10210 transitions. Word has length 52 [2021-11-07 07:34:25,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:25,159 INFO L470 AbstractCegarLoop]: Abstraction has 5401 states and 10210 transitions. [2021-11-07 07:34:25,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 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 07:34:25,159 INFO L276 IsEmpty]: Start isEmpty. Operand 5401 states and 10210 transitions. [2021-11-07 07:34:25,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 07:34:25,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:25,162 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] [2021-11-07 07:34:25,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 07:34:25,162 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 07:34:25,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:25,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2048199066, now seen corresponding path program 1 times [2021-11-07 07:34:25,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:25,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193051747] [2021-11-07 07:34:25,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:25,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:25,249 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 07:34:25,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:25,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193051747] [2021-11-07 07:34:25,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193051747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:25,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:25,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:34:25,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111433211] [2021-11-07 07:34:25,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:34:25,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:25,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:34:25,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:34:25,252 INFO L87 Difference]: Start difference. First operand 5401 states and 10210 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 07:34:25,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:25,709 INFO L93 Difference]: Finished difference Result 12954 states and 24505 transitions. [2021-11-07 07:34:25,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:34:25,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-11-07 07:34:25,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:25,733 INFO L225 Difference]: With dead ends: 12954 [2021-11-07 07:34:25,733 INFO L226 Difference]: Without dead ends: 7574 [2021-11-07 07:34:25,743 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 07:34:25,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7574 states. [2021-11-07 07:34:25,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7574 to 5401. [2021-11-07 07:34:25,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5401 states, 5396 states have (on average 1.8910303928836174) internal successors, (10204), 5400 states have internal predecessors, (10204), 0 states have call successors, (0), 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 07:34:25,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5401 states to 5401 states and 10204 transitions. [2021-11-07 07:34:25,985 INFO L78 Accepts]: Start accepts. Automaton has 5401 states and 10204 transitions. Word has length 53 [2021-11-07 07:34:25,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:25,986 INFO L470 AbstractCegarLoop]: Abstraction has 5401 states and 10204 transitions. [2021-11-07 07:34:25,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 07:34:25,987 INFO L276 IsEmpty]: Start isEmpty. Operand 5401 states and 10204 transitions. [2021-11-07 07:34:25,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 07:34:25,989 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:25,989 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] [2021-11-07 07:34:25,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 07:34:25,990 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 07:34:25,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:25,991 INFO L85 PathProgramCache]: Analyzing trace with hash 2122111324, now seen corresponding path program 1 times [2021-11-07 07:34:25,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:25,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480350746] [2021-11-07 07:34:25,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:25,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:26,058 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 07:34:26,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:26,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480350746] [2021-11-07 07:34:26,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480350746] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:26,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:26,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:34:26,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184826858] [2021-11-07 07:34:26,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:34:26,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:26,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:34:26,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:34:26,061 INFO L87 Difference]: Start difference. First operand 5401 states and 10204 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 07:34:26,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:26,446 INFO L93 Difference]: Finished difference Result 12954 states and 24493 transitions. [2021-11-07 07:34:26,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:34:26,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-11-07 07:34:26,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:26,466 INFO L225 Difference]: With dead ends: 12954 [2021-11-07 07:34:26,467 INFO L226 Difference]: Without dead ends: 7574 [2021-11-07 07:34:26,477 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 07:34:26,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7574 states. [2021-11-07 07:34:26,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7574 to 5401. [2021-11-07 07:34:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5401 states, 5396 states have (on average 1.8899184581171238) internal successors, (10198), 5400 states have internal predecessors, (10198), 0 states have call successors, (0), 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 07:34:26,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5401 states to 5401 states and 10198 transitions. [2021-11-07 07:34:26,742 INFO L78 Accepts]: Start accepts. Automaton has 5401 states and 10198 transitions. Word has length 54 [2021-11-07 07:34:26,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:26,745 INFO L470 AbstractCegarLoop]: Abstraction has 5401 states and 10198 transitions. [2021-11-07 07:34:26,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 07:34:26,746 INFO L276 IsEmpty]: Start isEmpty. Operand 5401 states and 10198 transitions. [2021-11-07 07:34:26,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 07:34:26,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:26,748 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] [2021-11-07 07:34:26,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 07:34:26,749 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 07:34:26,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:26,750 INFO L85 PathProgramCache]: Analyzing trace with hash -688111583, now seen corresponding path program 1 times [2021-11-07 07:34:26,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:26,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202352478] [2021-11-07 07:34:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:26,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:26,821 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 07:34:26,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:26,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202352478] [2021-11-07 07:34:26,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202352478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:26,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:26,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:34:26,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921347390] [2021-11-07 07:34:26,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:34:26,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:26,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:34:26,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:34:26,831 INFO L87 Difference]: Start difference. First operand 5401 states and 10198 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 07:34:27,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:27,103 INFO L93 Difference]: Finished difference Result 12945 states and 24470 transitions. [2021-11-07 07:34:27,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:34:27,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-11-07 07:34:27,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:27,125 INFO L225 Difference]: With dead ends: 12945 [2021-11-07 07:34:27,125 INFO L226 Difference]: Without dead ends: 7565 [2021-11-07 07:34:27,136 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 07:34:27,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7565 states. [2021-11-07 07:34:27,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7565 to 5401. [2021-11-07 07:34:27,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5401 states, 5396 states have (on average 1.8897331356560416) internal successors, (10197), 5400 states have internal predecessors, (10197), 0 states have call successors, (0), 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 07:34:27,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5401 states to 5401 states and 10197 transitions. [2021-11-07 07:34:27,364 INFO L78 Accepts]: Start accepts. Automaton has 5401 states and 10197 transitions. Word has length 55 [2021-11-07 07:34:27,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:27,365 INFO L470 AbstractCegarLoop]: Abstraction has 5401 states and 10197 transitions. [2021-11-07 07:34:27,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 07:34:27,365 INFO L276 IsEmpty]: Start isEmpty. Operand 5401 states and 10197 transitions. [2021-11-07 07:34:27,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 07:34:27,368 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:27,368 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] [2021-11-07 07:34:27,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 07:34:27,369 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 07:34:27,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:27,370 INFO L85 PathProgramCache]: Analyzing trace with hash 155893919, now seen corresponding path program 1 times [2021-11-07 07:34:27,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:27,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53224631] [2021-11-07 07:34:27,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:27,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:27,459 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 07:34:27,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:27,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53224631] [2021-11-07 07:34:27,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53224631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:27,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:27,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 07:34:27,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205382364] [2021-11-07 07:34:27,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:34:27,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:27,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:34:27,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:34:27,463 INFO L87 Difference]: Start difference. First operand 5401 states and 10197 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 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 07:34:28,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:28,252 INFO L93 Difference]: Finished difference Result 17289 states and 32679 transitions. [2021-11-07 07:34:28,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:34:28,252 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-11-07 07:34:28,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:28,274 INFO L225 Difference]: With dead ends: 17289 [2021-11-07 07:34:28,274 INFO L226 Difference]: Without dead ends: 11915 [2021-11-07 07:34:28,284 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:34:28,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11915 states. [2021-11-07 07:34:28,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11915 to 5403. [2021-11-07 07:34:28,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5403 states, 5398 states have (on average 1.889218228973694) internal successors, (10198), 5402 states have internal predecessors, (10198), 0 states have call successors, (0), 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 07:34:28,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5403 states to 5403 states and 10198 transitions. [2021-11-07 07:34:28,527 INFO L78 Accepts]: Start accepts. Automaton has 5403 states and 10198 transitions. Word has length 55 [2021-11-07 07:34:28,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:28,527 INFO L470 AbstractCegarLoop]: Abstraction has 5403 states and 10198 transitions. [2021-11-07 07:34:28,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 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 07:34:28,528 INFO L276 IsEmpty]: Start isEmpty. Operand 5403 states and 10198 transitions. [2021-11-07 07:34:28,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 07:34:28,530 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:28,530 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] [2021-11-07 07:34:28,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 07:34:28,531 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 07:34:28,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:28,532 INFO L85 PathProgramCache]: Analyzing trace with hash -907086511, now seen corresponding path program 1 times [2021-11-07 07:34:28,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:28,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860504575] [2021-11-07 07:34:28,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:28,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:28,596 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 07:34:28,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:28,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860504575] [2021-11-07 07:34:28,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860504575] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:28,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:28,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:34:28,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458414447] [2021-11-07 07:34:28,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:34:28,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:28,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:34:28,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:34:28,599 INFO L87 Difference]: Start difference. First operand 5403 states and 10198 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 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 07:34:31,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:31,035 INFO L93 Difference]: Finished difference Result 15168 states and 28717 transitions. [2021-11-07 07:34:31,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:34:31,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-11-07 07:34:31,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:31,055 INFO L225 Difference]: With dead ends: 15168 [2021-11-07 07:34:31,055 INFO L226 Difference]: Without dead ends: 9798 [2021-11-07 07:34:31,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:34:31,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9798 states. [2021-11-07 07:34:31,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9798 to 5403. [2021-11-07 07:34:31,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5403 states, 5398 states have (on average 1.851241200444609) internal successors, (9993), 5402 states have internal predecessors, (9993), 0 states have call successors, (0), 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 07:34:31,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5403 states to 5403 states and 9993 transitions. [2021-11-07 07:34:31,382 INFO L78 Accepts]: Start accepts. Automaton has 5403 states and 9993 transitions. Word has length 56 [2021-11-07 07:34:31,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:31,383 INFO L470 AbstractCegarLoop]: Abstraction has 5403 states and 9993 transitions. [2021-11-07 07:34:31,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 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 07:34:31,383 INFO L276 IsEmpty]: Start isEmpty. Operand 5403 states and 9993 transitions. [2021-11-07 07:34:31,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 07:34:31,386 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:31,386 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 07:34:31,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 07:34:31,387 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 07:34:31,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:31,388 INFO L85 PathProgramCache]: Analyzing trace with hash -17617253, now seen corresponding path program 1 times [2021-11-07 07:34:31,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:31,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328626274] [2021-11-07 07:34:31,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:31,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:31,480 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 07:34:31,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:31,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328626274] [2021-11-07 07:34:31,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328626274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:31,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:31,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:34:31,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694248826] [2021-11-07 07:34:31,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:34:31,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:31,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:34:31,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:34:31,484 INFO L87 Difference]: Start difference. First operand 5403 states and 9993 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) 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 07:34:36,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:36,178 INFO L93 Difference]: Finished difference Result 45118 states and 84971 transitions. [2021-11-07 07:34:36,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 07:34:36,179 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) 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 07:34:36,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:36,241 INFO L225 Difference]: With dead ends: 45118 [2021-11-07 07:34:36,241 INFO L226 Difference]: Without dead ends: 39766 [2021-11-07 07:34:36,254 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:34:36,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39766 states. [2021-11-07 07:34:37,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39766 to 10684. [2021-11-07 07:34:37,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10684 states, 10679 states have (on average 1.8536379810843713) internal successors, (19795), 10683 states have internal predecessors, (19795), 0 states have call successors, (0), 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 07:34:37,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10684 states to 10684 states and 19795 transitions. [2021-11-07 07:34:37,153 INFO L78 Accepts]: Start accepts. Automaton has 10684 states and 19795 transitions. Word has length 68 [2021-11-07 07:34:37,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:37,154 INFO L470 AbstractCegarLoop]: Abstraction has 10684 states and 19795 transitions. [2021-11-07 07:34:37,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) 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 07:34:37,154 INFO L276 IsEmpty]: Start isEmpty. Operand 10684 states and 19795 transitions. [2021-11-07 07:34:37,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 07:34:37,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:37,162 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 07:34:37,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 07:34:37,162 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 07:34:37,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:37,163 INFO L85 PathProgramCache]: Analyzing trace with hash 712103995, now seen corresponding path program 1 times [2021-11-07 07:34:37,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:37,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196495113] [2021-11-07 07:34:37,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:37,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:37,246 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 07:34:37,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:37,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196495113] [2021-11-07 07:34:37,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196495113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:37,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:37,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:34:37,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901331509] [2021-11-07 07:34:37,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:34:37,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:37,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:34:37,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:34:37,250 INFO L87 Difference]: Start difference. First operand 10684 states and 19795 transitions. Second operand has 5 states, 5 states have (on average 14.0) 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 07:34:41,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:41,809 INFO L93 Difference]: Finished difference Result 54592 states and 101780 transitions. [2021-11-07 07:34:41,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:34:41,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) 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 07:34:41,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:41,888 INFO L225 Difference]: With dead ends: 54592 [2021-11-07 07:34:41,888 INFO L226 Difference]: Without dead ends: 43997 [2021-11-07 07:34:41,903 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:34:41,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43997 states. [2021-11-07 07:34:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43997 to 15000. [2021-11-07 07:34:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15000 states, 14995 states have (on average 1.8520173391130377) internal successors, (27771), 14999 states have internal predecessors, (27771), 0 states have call successors, (0), 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 07:34:43,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15000 states to 15000 states and 27771 transitions. [2021-11-07 07:34:43,158 INFO L78 Accepts]: Start accepts. Automaton has 15000 states and 27771 transitions. Word has length 70 [2021-11-07 07:34:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:43,159 INFO L470 AbstractCegarLoop]: Abstraction has 15000 states and 27771 transitions. [2021-11-07 07:34:43,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) 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 07:34:43,159 INFO L276 IsEmpty]: Start isEmpty. Operand 15000 states and 27771 transitions. [2021-11-07 07:34:43,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 07:34:43,165 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:43,165 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 07:34:43,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 07:34:43,166 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 07:34:43,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:43,166 INFO L85 PathProgramCache]: Analyzing trace with hash 372239342, now seen corresponding path program 1 times [2021-11-07 07:34:43,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:43,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800523475] [2021-11-07 07:34:43,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:43,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:43,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:43,250 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 07:34:43,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:43,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800523475] [2021-11-07 07:34:43,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800523475] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:43,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:43,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:34:43,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953619806] [2021-11-07 07:34:43,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:34:43,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:43,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:34:43,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:34:43,253 INFO L87 Difference]: Start difference. First operand 15000 states and 27771 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 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 07:34:47,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:47,810 INFO L93 Difference]: Finished difference Result 60704 states and 113519 transitions. [2021-11-07 07:34:47,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:34:47,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 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 07:34:47,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:47,884 INFO L225 Difference]: With dead ends: 60704 [2021-11-07 07:34:47,884 INFO L226 Difference]: Without dead ends: 45754 [2021-11-07 07:34:47,896 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:34:47,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45754 states. [2021-11-07 07:34:49,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45754 to 25480. [2021-11-07 07:34:49,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25480 states, 25475 states have (on average 1.8353287536800784) internal successors, (46755), 25479 states have internal predecessors, (46755), 0 states have call successors, (0), 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 07:34:49,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25480 states to 25480 states and 46755 transitions. [2021-11-07 07:34:49,190 INFO L78 Accepts]: Start accepts. Automaton has 25480 states and 46755 transitions. Word has length 71 [2021-11-07 07:34:49,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:49,190 INFO L470 AbstractCegarLoop]: Abstraction has 25480 states and 46755 transitions. [2021-11-07 07:34:49,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 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 07:34:49,190 INFO L276 IsEmpty]: Start isEmpty. Operand 25480 states and 46755 transitions. [2021-11-07 07:34:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 07:34:49,194 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:49,195 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 07:34:49,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 07:34:49,195 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 07:34:49,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:49,196 INFO L85 PathProgramCache]: Analyzing trace with hash -728367501, now seen corresponding path program 1 times [2021-11-07 07:34:49,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:49,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882223434] [2021-11-07 07:34:49,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:49,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:49,273 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 07:34:49,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:49,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882223434] [2021-11-07 07:34:49,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882223434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:49,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:49,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:34:49,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920120033] [2021-11-07 07:34:49,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:34:49,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:49,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:34:49,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:34:49,277 INFO L87 Difference]: Start difference. First operand 25480 states and 46755 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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 07:34:50,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:50,752 INFO L93 Difference]: Finished difference Result 53801 states and 98772 transitions. [2021-11-07 07:34:50,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:34:50,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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 07:34:50,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:50,794 INFO L225 Difference]: With dead ends: 53801 [2021-11-07 07:34:50,794 INFO L226 Difference]: Without dead ends: 28345 [2021-11-07 07:34:50,815 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:34:50,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28345 states. [2021-11-07 07:34:51,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28345 to 16621. [2021-11-07 07:34:51,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16621 states, 16616 states have (on average 1.835519980741454) internal successors, (30499), 16620 states have internal predecessors, (30499), 0 states have call successors, (0), 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 07:34:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16621 states to 16621 states and 30499 transitions. [2021-11-07 07:34:51,709 INFO L78 Accepts]: Start accepts. Automaton has 16621 states and 30499 transitions. Word has length 71 [2021-11-07 07:34:51,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:51,709 INFO L470 AbstractCegarLoop]: Abstraction has 16621 states and 30499 transitions. [2021-11-07 07:34:51,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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 07:34:51,709 INFO L276 IsEmpty]: Start isEmpty. Operand 16621 states and 30499 transitions. [2021-11-07 07:34:51,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 07:34:51,711 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:51,711 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 07:34:51,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 07:34:51,711 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 07:34:51,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:51,712 INFO L85 PathProgramCache]: Analyzing trace with hash 341611366, now seen corresponding path program 1 times [2021-11-07 07:34:51,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:51,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113258547] [2021-11-07 07:34:51,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:51,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:51,787 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 07:34:51,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:51,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113258547] [2021-11-07 07:34:51,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113258547] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:51,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:51,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:34:51,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085749602] [2021-11-07 07:34:51,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:34:51,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:51,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:34:51,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:34:51,791 INFO L87 Difference]: Start difference. First operand 16621 states and 30499 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 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 07:34:57,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:57,529 INFO L93 Difference]: Finished difference Result 134906 states and 248081 transitions. [2021-11-07 07:34:57,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:34:57,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 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 07:34:57,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:57,763 INFO L225 Difference]: With dead ends: 134906 [2021-11-07 07:34:57,764 INFO L226 Difference]: Without dead ends: 118328 [2021-11-07 07:34:57,795 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:34:57,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118328 states. [2021-11-07 07:34:59,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118328 to 32245. [2021-11-07 07:34:59,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32245 states, 32240 states have (on average 1.8357320099255583) internal successors, (59184), 32244 states have internal predecessors, (59184), 0 states have call successors, (0), 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 07:35:00,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32245 states to 32245 states and 59184 transitions. [2021-11-07 07:35:00,019 INFO L78 Accepts]: Start accepts. Automaton has 32245 states and 59184 transitions. Word has length 73 [2021-11-07 07:35:00,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:35:00,019 INFO L470 AbstractCegarLoop]: Abstraction has 32245 states and 59184 transitions. [2021-11-07 07:35:00,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 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 07:35:00,019 INFO L276 IsEmpty]: Start isEmpty. Operand 32245 states and 59184 transitions. [2021-11-07 07:35:00,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 07:35:00,022 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:35:00,022 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 07:35:00,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 07:35:00,022 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 07:35:00,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:35:00,023 INFO L85 PathProgramCache]: Analyzing trace with hash -502394136, now seen corresponding path program 1 times [2021-11-07 07:35:00,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:35:00,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634748452] [2021-11-07 07:35:00,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:35:00,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:35:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:35:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:35:00,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:35:00,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634748452] [2021-11-07 07:35:00,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634748452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:35:00,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:35:00,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:35:00,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750136575] [2021-11-07 07:35:00,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:35:00,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:35:00,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:35:00,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:35:00,086 INFO L87 Difference]: Start difference. First operand 32245 states and 59184 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 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 07:35:01,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:35:01,963 INFO L93 Difference]: Finished difference Result 52028 states and 94410 transitions. [2021-11-07 07:35:01,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:35:01,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 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 07:35:01,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:35:02,013 INFO L225 Difference]: With dead ends: 52028 [2021-11-07 07:35:02,014 INFO L226 Difference]: Without dead ends: 33295 [2021-11-07 07:35:02,027 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:35:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33295 states. [2021-11-07 07:35:03,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33295 to 33285. [2021-11-07 07:35:03,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33285 states, 33280 states have (on average 1.8216045673076924) internal successors, (60623), 33284 states have internal predecessors, (60623), 0 states have call successors, (0), 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 07:35:03,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33285 states to 33285 states and 60623 transitions. [2021-11-07 07:35:03,729 INFO L78 Accepts]: Start accepts. Automaton has 33285 states and 60623 transitions. Word has length 73 [2021-11-07 07:35:03,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:35:03,730 INFO L470 AbstractCegarLoop]: Abstraction has 33285 states and 60623 transitions. [2021-11-07 07:35:03,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 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 07:35:03,730 INFO L276 IsEmpty]: Start isEmpty. Operand 33285 states and 60623 transitions. [2021-11-07 07:35:03,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 07:35:03,733 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:35:03,733 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 07:35:03,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 07:35:03,734 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 07:35:03,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:35:03,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1203994010, now seen corresponding path program 1 times [2021-11-07 07:35:03,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:35:03,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011481970] [2021-11-07 07:35:03,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:35:03,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:35:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:35:03,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:35:03,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:35:03,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011481970] [2021-11-07 07:35:03,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011481970] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:35:03,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:35:03,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:35:03,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636068226] [2021-11-07 07:35:03,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:35:03,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:35:03,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:35:03,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:35:03,826 INFO L87 Difference]: Start difference. First operand 33285 states and 60623 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) 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 07:35:08,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:35:08,178 INFO L93 Difference]: Finished difference Result 81894 states and 150490 transitions. [2021-11-07 07:35:08,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 07:35:08,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) 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 07:35:08,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:35:08,279 INFO L225 Difference]: With dead ends: 81894 [2021-11-07 07:35:08,279 INFO L226 Difference]: Without dead ends: 63198 [2021-11-07 07:35:08,299 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:35:08,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63198 states. [2021-11-07 07:35:09,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63198 to 33237. [2021-11-07 07:35:09,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33237 states, 33232 states have (on average 1.8213468945594609) internal successors, (60527), 33236 states have internal predecessors, (60527), 0 states have call successors, (0), 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 07:35:09,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33237 states to 33237 states and 60527 transitions. [2021-11-07 07:35:09,972 INFO L78 Accepts]: Start accepts. Automaton has 33237 states and 60527 transitions. Word has length 73 [2021-11-07 07:35:09,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:35:09,972 INFO L470 AbstractCegarLoop]: Abstraction has 33237 states and 60527 transitions. [2021-11-07 07:35:09,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) 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 07:35:09,973 INFO L276 IsEmpty]: Start isEmpty. Operand 33237 states and 60527 transitions. [2021-11-07 07:35:09,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 07:35:09,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:35:09,974 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] [2021-11-07 07:35:09,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 07:35:09,975 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 07:35:09,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:35:09,975 INFO L85 PathProgramCache]: Analyzing trace with hash -739112864, now seen corresponding path program 1 times [2021-11-07 07:35:09,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:35:09,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753723193] [2021-11-07 07:35:09,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:35:09,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:35:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:35:10,039 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 07:35:10,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:35:10,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753723193] [2021-11-07 07:35:10,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753723193] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:35:10,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:35:10,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:35:10,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060022356] [2021-11-07 07:35:10,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:35:10,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:35:10,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:35:10,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:35:10,042 INFO L87 Difference]: Start difference. First operand 33237 states and 60527 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 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 07:35:14,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:35:14,697 INFO L93 Difference]: Finished difference Result 130171 states and 236935 transitions. [2021-11-07 07:35:14,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:35:14,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-07 07:35:14,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:35:15,010 INFO L225 Difference]: With dead ends: 130171 [2021-11-07 07:35:15,010 INFO L226 Difference]: Without dead ends: 111504 [2021-11-07 07:35:15,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:35:15,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111504 states. [2021-11-07 07:35:17,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111504 to 50533. [2021-11-07 07:35:17,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50533 states, 50528 states have (on average 1.812539582013933) internal successors, (91584), 50532 states have internal predecessors, (91584), 0 states have call successors, (0), 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 07:35:17,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50533 states to 50533 states and 91584 transitions. [2021-11-07 07:35:17,897 INFO L78 Accepts]: Start accepts. Automaton has 50533 states and 91584 transitions. Word has length 75 [2021-11-07 07:35:17,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:35:17,898 INFO L470 AbstractCegarLoop]: Abstraction has 50533 states and 91584 transitions. [2021-11-07 07:35:17,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 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 07:35:17,898 INFO L276 IsEmpty]: Start isEmpty. Operand 50533 states and 91584 transitions. [2021-11-07 07:35:17,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 07:35:17,899 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:35:17,900 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 07:35:17,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 07:35:17,900 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 07:35:17,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:35:17,900 INFO L85 PathProgramCache]: Analyzing trace with hash 2054997388, now seen corresponding path program 1 times [2021-11-07 07:35:17,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:35:17,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431939736] [2021-11-07 07:35:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:35:17,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:35:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:35:17,962 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 07:35:17,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:35:17,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431939736] [2021-11-07 07:35:17,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431939736] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:35:17,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:35:17,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:35:17,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900539210] [2021-11-07 07:35:17,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:35:17,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:35:17,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:35:17,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:35:17,965 INFO L87 Difference]: Start difference. First operand 50533 states and 91584 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)