./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product32.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_f9e95a1d-d137-45cf-ae90-2f201e905c4b/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9e95a1d-d137-45cf-ae90-2f201e905c4b/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_f9e95a1d-d137-45cf-ae90-2f201e905c4b/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9e95a1d-d137-45cf-ae90-2f201e905c4b/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9e95a1d-d137-45cf-ae90-2f201e905c4b/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_f9e95a1d-d137-45cf-ae90-2f201e905c4b/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 6f20249a191004f50add5285446ee5ffba043f1ff9b40e0e115c641082e595e2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:08:48,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:08:48,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:08:48,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:08:48,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:08:48,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:08:48,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:08:48,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:08:48,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:08:48,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:08:48,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:08:48,962 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:08:48,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:08:48,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:08:48,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:08:48,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:08:48,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:08:48,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:08:48,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:08:48,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:08:49,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:08:49,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:08:49,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:08:49,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:08:49,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:08:49,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:08:49,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:08:49,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:08:49,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:08:49,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:08:49,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:08:49,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:08:49,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:08:49,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:08:49,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:08:49,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:08:49,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:08:49,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:08:49,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:08:49,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:08:49,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:08:49,037 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9e95a1d-d137-45cf-ae90-2f201e905c4b/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:08:49,091 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:08:49,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:08:49,092 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:08:49,092 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:08:49,094 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:08:49,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:08:49,095 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:08:49,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:08:49,095 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:08:49,096 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:08:49,096 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:08:49,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:08:49,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:08:49,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:08:49,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:08:49,097 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:08:49,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:08:49,098 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:08:49,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:08:49,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:08:49,099 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:08:49,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:08:49,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:08:49,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:08:49,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:08:49,101 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:08:49,101 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:08:49,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:08:49,101 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:08:49,102 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:08:49,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:08:49,102 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:08:49,103 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_f9e95a1d-d137-45cf-ae90-2f201e905c4b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9e95a1d-d137-45cf-ae90-2f201e905c4b/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f20249a191004f50add5285446ee5ffba043f1ff9b40e0e115c641082e595e2 [2021-11-07 08:08:49,480 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:08:49,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:08:49,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:08:49,513 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:08:49,514 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:08:49,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9e95a1d-d137-45cf-ae90-2f201e905c4b/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c [2021-11-07 08:08:49,608 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9e95a1d-d137-45cf-ae90-2f201e905c4b/bin/uautomizer-AkOaLMaTGY/data/96d0c2ddf/37725dfdf7f04d7f9b7ddea2063971c3/FLAG31c538d9c [2021-11-07 08:08:50,527 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:08:50,530 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9e95a1d-d137-45cf-ae90-2f201e905c4b/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c [2021-11-07 08:08:50,560 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9e95a1d-d137-45cf-ae90-2f201e905c4b/bin/uautomizer-AkOaLMaTGY/data/96d0c2ddf/37725dfdf7f04d7f9b7ddea2063971c3/FLAG31c538d9c [2021-11-07 08:08:50,646 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9e95a1d-d137-45cf-ae90-2f201e905c4b/bin/uautomizer-AkOaLMaTGY/data/96d0c2ddf/37725dfdf7f04d7f9b7ddea2063971c3 [2021-11-07 08:08:50,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:08:50,651 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:08:50,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:08:50,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:08:50,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:08:50,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:08:50" (1/1) ... [2021-11-07 08:08:50,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ce3b4f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:50, skipping insertion in model container [2021-11-07 08:08:50,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:08:50" (1/1) ... [2021-11-07 08:08:50,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:08:50,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:08:51,004 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_f9e95a1d-d137-45cf-ae90-2f201e905c4b/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c[17414,17427] [2021-11-07 08:08:51,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:08:51,309 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:08:51,348 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_f9e95a1d-d137-45cf-ae90-2f201e905c4b/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c[17414,17427] [2021-11-07 08:08:51,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:08:51,490 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:08:51,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:51 WrapperNode [2021-11-07 08:08:51,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:08:51,492 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:08:51,492 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:08:51,492 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:08:51,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:51" (1/1) ... [2021-11-07 08:08:51,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:51" (1/1) ... [2021-11-07 08:08:52,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:08:52,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:08:52,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:08:52,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:08:52,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:51" (1/1) ... [2021-11-07 08:08:52,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:51" (1/1) ... [2021-11-07 08:08:52,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:51" (1/1) ... [2021-11-07 08:08:52,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:51" (1/1) ... [2021-11-07 08:08:52,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:51" (1/1) ... [2021-11-07 08:08:52,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:51" (1/1) ... [2021-11-07 08:08:52,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:51" (1/1) ... [2021-11-07 08:08:52,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:08:52,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:08:52,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:08:52,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:08:52,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:51" (1/1) ... [2021-11-07 08:08:52,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:08:53,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9e95a1d-d137-45cf-ae90-2f201e905c4b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:53,058 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9e95a1d-d137-45cf-ae90-2f201e905c4b/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:08:53,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9e95a1d-d137-45cf-ae90-2f201e905c4b/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:08:53,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:08:53,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:08:53,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:08:53,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:09:07,882 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:09:07,883 INFO L299 CfgBuilder]: Removed 1697 assume(true) statements. [2021-11-07 08:09:07,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:09:07 BoogieIcfgContainer [2021-11-07 08:09:07,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:09:07,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:09:07,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:09:07,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:09:07,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:08:50" (1/3) ... [2021-11-07 08:09:07,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da25a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:09:07, skipping insertion in model container [2021-11-07 08:09:07,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:51" (2/3) ... [2021-11-07 08:09:07,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da25a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:09:07, skipping insertion in model container [2021-11-07 08:09:07,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:09:07" (3/3) ... [2021-11-07 08:09:07,914 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product32.cil.c [2021-11-07 08:09:07,922 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:09:07,922 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 08:09:08,029 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:09:08,035 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 08:09:08,036 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 08:09:08,217 INFO L276 IsEmpty]: Start isEmpty. Operand has 7188 states, 7182 states have (on average 1.8884711779448622) internal successors, (13563), 7187 states have internal predecessors, (13563), 0 states have call successors, (0), 0 states 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 08:09:08,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 08:09:08,234 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:08,235 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] [2021-11-07 08:09:08,236 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 08:09:08,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:08,252 INFO L85 PathProgramCache]: Analyzing trace with hash -983298927, now seen corresponding path program 1 times [2021-11-07 08:09:08,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:08,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862831218] [2021-11-07 08:09:08,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:08,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:08,766 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 08:09:08,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:08,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862831218] [2021-11-07 08:09:08,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862831218] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:08,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:08,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:09:08,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245862385] [2021-11-07 08:09:08,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:09:08,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:08,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:09:08,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:09:08,831 INFO L87 Difference]: Start difference. First operand has 7188 states, 7182 states have (on average 1.8884711779448622) internal successors, (13563), 7187 states have internal predecessors, (13563), 0 states have call successors, (0), 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 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states 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 08:09:09,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:09,382 INFO L93 Difference]: Finished difference Result 14367 states and 27109 transitions. [2021-11-07 08:09:09,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:09:09,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-11-07 08:09:09,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:09,482 INFO L225 Difference]: With dead ends: 14367 [2021-11-07 08:09:09,483 INFO L226 Difference]: Without dead ends: 7184 [2021-11-07 08:09:09,509 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 08:09:09,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7184 states. [2021-11-07 08:09:10,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7184 to 7184. [2021-11-07 08:09:10,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7184 states, 7179 states have (on average 1.8867530296698705) internal successors, (13545), 7183 states have internal predecessors, (13545), 0 states have call successors, (0), 0 states 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 08:09:10,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7184 states to 7184 states and 13545 transitions. [2021-11-07 08:09:10,101 INFO L78 Accepts]: Start accepts. Automaton has 7184 states and 13545 transitions. Word has length 26 [2021-11-07 08:09:10,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:10,102 INFO L470 AbstractCegarLoop]: Abstraction has 7184 states and 13545 transitions. [2021-11-07 08:09:10,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states 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 08:09:10,102 INFO L276 IsEmpty]: Start isEmpty. Operand 7184 states and 13545 transitions. [2021-11-07 08:09:10,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 08:09:10,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:10,106 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] [2021-11-07 08:09:10,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:09:10,107 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 08:09:10,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:10,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1491748970, now seen corresponding path program 1 times [2021-11-07 08:09:10,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:10,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084441949] [2021-11-07 08:09:10,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:10,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:10,509 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 08:09:10,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:10,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084441949] [2021-11-07 08:09:10,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084441949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:10,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:10,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:09:10,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89416864] [2021-11-07 08:09:10,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:09:10,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:10,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:09:10,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:09:10,515 INFO L87 Difference]: Start difference. First operand 7184 states and 13545 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states 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 08:09:11,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:11,331 INFO L93 Difference]: Finished difference Result 14319 states and 27006 transitions. [2021-11-07 08:09:11,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:09:11,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-11-07 08:09:11,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:11,392 INFO L225 Difference]: With dead ends: 14319 [2021-11-07 08:09:11,392 INFO L226 Difference]: Without dead ends: 7178 [2021-11-07 08:09:11,404 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:09:11,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7178 states. [2021-11-07 08:09:11,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7178 to 7178. [2021-11-07 08:09:11,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7178 states, 7173 states have (on average 1.8865188902830057) internal successors, (13532), 7177 states have internal predecessors, (13532), 0 states have call successors, (0), 0 states 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 08:09:11,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7178 states to 7178 states and 13532 transitions. [2021-11-07 08:09:11,857 INFO L78 Accepts]: Start accepts. Automaton has 7178 states and 13532 transitions. Word has length 33 [2021-11-07 08:09:11,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:11,858 INFO L470 AbstractCegarLoop]: Abstraction has 7178 states and 13532 transitions. [2021-11-07 08:09:11,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states 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 08:09:11,859 INFO L276 IsEmpty]: Start isEmpty. Operand 7178 states and 13532 transitions. [2021-11-07 08:09:11,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 08:09:11,866 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:11,867 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:11,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:09:11,868 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 08:09:11,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:11,871 INFO L85 PathProgramCache]: Analyzing trace with hash 2079513228, now seen corresponding path program 1 times [2021-11-07 08:09:11,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:11,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215945809] [2021-11-07 08:09:11,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:11,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:12,036 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 08:09:12,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:12,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215945809] [2021-11-07 08:09:12,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215945809] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:12,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:12,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:09:12,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788688520] [2021-11-07 08:09:12,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:09:12,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:12,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:09:12,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:09:12,050 INFO L87 Difference]: Start difference. First operand 7178 states and 13532 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 08:09:12,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:12,811 INFO L93 Difference]: Finished difference Result 14313 states and 26993 transitions. [2021-11-07 08:09:12,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:09:12,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-11-07 08:09:12,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:12,892 INFO L225 Difference]: With dead ends: 14313 [2021-11-07 08:09:12,892 INFO L226 Difference]: Without dead ends: 7178 [2021-11-07 08:09:12,902 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 08:09:12,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7178 states. [2021-11-07 08:09:13,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7178 to 7178. [2021-11-07 08:09:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7178 states, 7173 states have (on average 1.8859612435522097) internal successors, (13528), 7177 states have internal predecessors, (13528), 0 states have call successors, (0), 0 states 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 08:09:13,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7178 states to 7178 states and 13528 transitions. [2021-11-07 08:09:13,241 INFO L78 Accepts]: Start accepts. Automaton has 7178 states and 13528 transitions. Word has length 34 [2021-11-07 08:09:13,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:13,242 INFO L470 AbstractCegarLoop]: Abstraction has 7178 states and 13528 transitions. [2021-11-07 08:09:13,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 08:09:13,242 INFO L276 IsEmpty]: Start isEmpty. Operand 7178 states and 13528 transitions. [2021-11-07 08:09:13,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 08:09:13,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:13,245 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:13,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:09:13,246 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 08:09:13,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:13,247 INFO L85 PathProgramCache]: Analyzing trace with hash -849903961, now seen corresponding path program 1 times [2021-11-07 08:09:13,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:13,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335372629] [2021-11-07 08:09:13,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:13,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:13,368 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 08:09:13,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:13,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335372629] [2021-11-07 08:09:13,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335372629] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:13,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:13,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:09:13,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116026656] [2021-11-07 08:09:13,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:09:13,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:13,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:09:13,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:09:13,379 INFO L87 Difference]: Start difference. First operand 7178 states and 13528 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 08:09:13,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:13,923 INFO L93 Difference]: Finished difference Result 14313 states and 26989 transitions. [2021-11-07 08:09:13,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:09:13,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-11-07 08:09:13,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:13,950 INFO L225 Difference]: With dead ends: 14313 [2021-11-07 08:09:13,951 INFO L226 Difference]: Without dead ends: 7178 [2021-11-07 08:09:13,965 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 08:09:13,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7178 states. [2021-11-07 08:09:14,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7178 to 7178. [2021-11-07 08:09:14,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7178 states, 7173 states have (on average 1.8854035968214136) internal successors, (13524), 7177 states have internal predecessors, (13524), 0 states have call successors, (0), 0 states 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 08:09:14,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7178 states to 7178 states and 13524 transitions. [2021-11-07 08:09:14,416 INFO L78 Accepts]: Start accepts. Automaton has 7178 states and 13524 transitions. Word has length 35 [2021-11-07 08:09:14,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:14,417 INFO L470 AbstractCegarLoop]: Abstraction has 7178 states and 13524 transitions. [2021-11-07 08:09:14,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 08:09:14,418 INFO L276 IsEmpty]: Start isEmpty. Operand 7178 states and 13524 transitions. [2021-11-07 08:09:14,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 08:09:14,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:14,419 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] [2021-11-07 08:09:14,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:09:14,420 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 08:09:14,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:14,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2137049223, now seen corresponding path program 1 times [2021-11-07 08:09:14,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:14,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033748509] [2021-11-07 08:09:14,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:14,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:14,547 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 08:09:14,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:14,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033748509] [2021-11-07 08:09:14,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033748509] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:14,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:14,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:09:14,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080861978] [2021-11-07 08:09:14,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:09:14,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:14,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:09:14,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:09:14,551 INFO L87 Difference]: Start difference. First operand 7178 states and 13524 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 08:09:15,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:15,141 INFO L93 Difference]: Finished difference Result 14313 states and 26985 transitions. [2021-11-07 08:09:15,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:09:15,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-07 08:09:15,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:15,176 INFO L225 Difference]: With dead ends: 14313 [2021-11-07 08:09:15,176 INFO L226 Difference]: Without dead ends: 7178 [2021-11-07 08:09:15,191 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 08:09:15,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7178 states. [2021-11-07 08:09:15,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7178 to 7178. [2021-11-07 08:09:15,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7178 states, 7173 states have (on average 1.8848459500906176) internal successors, (13520), 7177 states have internal predecessors, (13520), 0 states have call successors, (0), 0 states 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 08:09:15,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7178 states to 7178 states and 13520 transitions. [2021-11-07 08:09:15,596 INFO L78 Accepts]: Start accepts. Automaton has 7178 states and 13520 transitions. Word has length 36 [2021-11-07 08:09:15,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:15,596 INFO L470 AbstractCegarLoop]: Abstraction has 7178 states and 13520 transitions. [2021-11-07 08:09:15,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 08:09:15,597 INFO L276 IsEmpty]: Start isEmpty. Operand 7178 states and 13520 transitions. [2021-11-07 08:09:15,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 08:09:15,599 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:15,599 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] [2021-11-07 08:09:15,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:09:15,600 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 08:09:15,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:15,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1564910585, now seen corresponding path program 1 times [2021-11-07 08:09:15,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:15,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544274107] [2021-11-07 08:09:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:15,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:15,730 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 08:09:15,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:15,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544274107] [2021-11-07 08:09:15,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544274107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:15,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:15,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:09:15,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445801903] [2021-11-07 08:09:15,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:09:15,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:15,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:09:15,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:09:15,742 INFO L87 Difference]: Start difference. First operand 7178 states and 13520 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 08:09:16,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:16,188 INFO L93 Difference]: Finished difference Result 14313 states and 26981 transitions. [2021-11-07 08:09:16,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:09:16,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-07 08:09:16,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:16,210 INFO L225 Difference]: With dead ends: 14313 [2021-11-07 08:09:16,210 INFO L226 Difference]: Without dead ends: 7157 [2021-11-07 08:09:16,221 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 08:09:16,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7157 states. [2021-11-07 08:09:16,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7157 to 7157. [2021-11-07 08:09:16,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7157 states, 7152 states have (on average 1.8856263982102908) internal successors, (13486), 7156 states have internal predecessors, (13486), 0 states have call successors, (0), 0 states 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 08:09:16,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7157 states to 7157 states and 13486 transitions. [2021-11-07 08:09:16,590 INFO L78 Accepts]: Start accepts. Automaton has 7157 states and 13486 transitions. Word has length 36 [2021-11-07 08:09:16,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:16,591 INFO L470 AbstractCegarLoop]: Abstraction has 7157 states and 13486 transitions. [2021-11-07 08:09:16,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 08:09:16,591 INFO L276 IsEmpty]: Start isEmpty. Operand 7157 states and 13486 transitions. [2021-11-07 08:09:16,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 08:09:16,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:16,593 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:16,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:09:16,593 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 08:09:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:16,594 INFO L85 PathProgramCache]: Analyzing trace with hash -447077054, now seen corresponding path program 1 times [2021-11-07 08:09:16,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:16,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728840233] [2021-11-07 08:09:16,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:16,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:16,669 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 08:09:16,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:16,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728840233] [2021-11-07 08:09:16,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728840233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:16,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:16,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:09:16,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720077655] [2021-11-07 08:09:16,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:09:16,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:16,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:09:16,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:09:16,673 INFO L87 Difference]: Start difference. First operand 7157 states and 13486 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:17,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:17,052 INFO L93 Difference]: Finished difference Result 14292 states and 26947 transitions. [2021-11-07 08:09:17,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:09:17,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-07 08:09:17,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:17,080 INFO L225 Difference]: With dead ends: 14292 [2021-11-07 08:09:17,080 INFO L226 Difference]: Without dead ends: 7157 [2021-11-07 08:09:17,094 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 08:09:17,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7157 states. [2021-11-07 08:09:17,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7157 to 7157. [2021-11-07 08:09:17,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7157 states, 7152 states have (on average 1.8854865771812082) internal successors, (13485), 7156 states have internal predecessors, (13485), 0 states have call successors, (0), 0 states 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 08:09:17,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7157 states to 7157 states and 13485 transitions. [2021-11-07 08:09:17,516 INFO L78 Accepts]: Start accepts. Automaton has 7157 states and 13485 transitions. Word has length 37 [2021-11-07 08:09:17,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:17,517 INFO L470 AbstractCegarLoop]: Abstraction has 7157 states and 13485 transitions. [2021-11-07 08:09:17,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:17,518 INFO L276 IsEmpty]: Start isEmpty. Operand 7157 states and 13485 transitions. [2021-11-07 08:09:17,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 08:09:17,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:17,521 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] [2021-11-07 08:09:17,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:09:17,522 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 08:09:17,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:17,522 INFO L85 PathProgramCache]: Analyzing trace with hash 358992514, now seen corresponding path program 1 times [2021-11-07 08:09:17,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:17,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395085868] [2021-11-07 08:09:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:17,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:17,667 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 08:09:17,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:17,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395085868] [2021-11-07 08:09:17,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395085868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:17,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:17,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:09:17,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944263138] [2021-11-07 08:09:17,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:09:17,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:17,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:09:17,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:09:17,671 INFO L87 Difference]: Start difference. First operand 7157 states and 13485 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 08:09:18,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:18,138 INFO L93 Difference]: Finished difference Result 14292 states and 26946 transitions. [2021-11-07 08:09:18,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:09:18,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-11-07 08:09:18,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:18,166 INFO L225 Difference]: With dead ends: 14292 [2021-11-07 08:09:18,167 INFO L226 Difference]: Without dead ends: 7157 [2021-11-07 08:09:18,179 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 08:09:18,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7157 states. [2021-11-07 08:09:18,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7157 to 7157. [2021-11-07 08:09:18,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7157 states, 7152 states have (on average 1.8853467561521253) internal successors, (13484), 7156 states have internal predecessors, (13484), 0 states have call successors, (0), 0 states 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 08:09:18,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7157 states to 7157 states and 13484 transitions. [2021-11-07 08:09:18,504 INFO L78 Accepts]: Start accepts. Automaton has 7157 states and 13484 transitions. Word has length 38 [2021-11-07 08:09:18,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:18,505 INFO L470 AbstractCegarLoop]: Abstraction has 7157 states and 13484 transitions. [2021-11-07 08:09:18,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 08:09:18,506 INFO L276 IsEmpty]: Start isEmpty. Operand 7157 states and 13484 transitions. [2021-11-07 08:09:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 08:09:18,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:18,507 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:18,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:09:18,507 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 08:09:18,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:18,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1113049123, now seen corresponding path program 1 times [2021-11-07 08:09:18,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:18,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815166185] [2021-11-07 08:09:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:18,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:18,620 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 08:09:18,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:18,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815166185] [2021-11-07 08:09:18,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815166185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:18,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:18,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 08:09:18,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144204849] [2021-11-07 08:09:18,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:09:18,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:18,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:09:18,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:09:18,626 INFO L87 Difference]: Start difference. First operand 7157 states and 13484 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 08:09:19,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:19,111 INFO L93 Difference]: Finished difference Result 14286 states and 26934 transitions. [2021-11-07 08:09:19,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:09:19,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-11-07 08:09:19,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:19,136 INFO L225 Difference]: With dead ends: 14286 [2021-11-07 08:09:19,136 INFO L226 Difference]: Without dead ends: 7157 [2021-11-07 08:09:19,147 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:09:19,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7157 states. [2021-11-07 08:09:19,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7157 to 7157. [2021-11-07 08:09:19,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7157 states, 7152 states have (on average 1.8852069351230425) internal successors, (13483), 7156 states have internal predecessors, (13483), 0 states have call successors, (0), 0 states 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 08:09:19,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7157 states to 7157 states and 13483 transitions. [2021-11-07 08:09:19,554 INFO L78 Accepts]: Start accepts. Automaton has 7157 states and 13483 transitions. Word has length 39 [2021-11-07 08:09:19,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:19,557 INFO L470 AbstractCegarLoop]: Abstraction has 7157 states and 13483 transitions. [2021-11-07 08:09:19,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 08:09:19,557 INFO L276 IsEmpty]: Start isEmpty. Operand 7157 states and 13483 transitions. [2021-11-07 08:09:19,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 08:09:19,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:19,559 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] [2021-11-07 08:09:19,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:09:19,559 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 08:09:19,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:19,560 INFO L85 PathProgramCache]: Analyzing trace with hash -888016467, now seen corresponding path program 1 times [2021-11-07 08:09:19,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:19,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151348204] [2021-11-07 08:09:19,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:19,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:19,664 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 08:09:19,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:19,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151348204] [2021-11-07 08:09:19,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151348204] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:19,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:19,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:09:19,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417513408] [2021-11-07 08:09:19,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:09:19,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:19,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:09:19,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:09:19,667 INFO L87 Difference]: Start difference. First operand 7157 states and 13483 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 08:09:20,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:20,532 INFO L93 Difference]: Finished difference Result 15897 states and 30001 transitions. [2021-11-07 08:09:20,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:09:20,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-11-07 08:09:20,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:20,563 INFO L225 Difference]: With dead ends: 15897 [2021-11-07 08:09:20,563 INFO L226 Difference]: Without dead ends: 12278 [2021-11-07 08:09:20,675 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 08:09:20,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12278 states. [2021-11-07 08:09:21,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12278 to 10179. [2021-11-07 08:09:21,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10179 states, 10174 states have (on average 1.8860821702378612) internal successors, (19189), 10178 states have internal predecessors, (19189), 0 states have call successors, (0), 0 states 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 08:09:21,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10179 states to 10179 states and 19189 transitions. [2021-11-07 08:09:21,130 INFO L78 Accepts]: Start accepts. Automaton has 10179 states and 19189 transitions. Word has length 40 [2021-11-07 08:09:21,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:21,130 INFO L470 AbstractCegarLoop]: Abstraction has 10179 states and 19189 transitions. [2021-11-07 08:09:21,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 08:09:21,131 INFO L276 IsEmpty]: Start isEmpty. Operand 10179 states and 19189 transitions. [2021-11-07 08:09:21,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 08:09:21,146 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:21,146 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] [2021-11-07 08:09:21,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:09:21,147 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 08:09:21,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:21,148 INFO L85 PathProgramCache]: Analyzing trace with hash -608244677, now seen corresponding path program 1 times [2021-11-07 08:09:21,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:21,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305765936] [2021-11-07 08:09:21,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:21,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:21,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:21,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:21,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305765936] [2021-11-07 08:09:21,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305765936] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:21,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:21,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:09:21,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108183626] [2021-11-07 08:09:21,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:09:21,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:21,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:09:21,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:09:21,257 INFO L87 Difference]: Start difference. First operand 10179 states and 19189 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 08:09:22,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:22,106 INFO L93 Difference]: Finished difference Result 20709 states and 38893 transitions. [2021-11-07 08:09:22,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:09:22,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-11-07 08:09:22,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:22,137 INFO L225 Difference]: With dead ends: 20709 [2021-11-07 08:09:22,137 INFO L226 Difference]: Without dead ends: 11796 [2021-11-07 08:09:22,149 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 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 08:09:22,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11796 states. [2021-11-07 08:09:22,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11796 to 8430. [2021-11-07 08:09:22,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8430 states, 8425 states have (on average 1.8789317507418397) internal successors, (15830), 8429 states have internal predecessors, (15830), 0 states have call successors, (0), 0 states 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 08:09:22,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8430 states to 8430 states and 15830 transitions. [2021-11-07 08:09:22,766 INFO L78 Accepts]: Start accepts. Automaton has 8430 states and 15830 transitions. Word has length 59 [2021-11-07 08:09:22,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:22,766 INFO L470 AbstractCegarLoop]: Abstraction has 8430 states and 15830 transitions. [2021-11-07 08:09:22,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 08:09:22,767 INFO L276 IsEmpty]: Start isEmpty. Operand 8430 states and 15830 transitions. [2021-11-07 08:09:22,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 08:09:22,771 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:22,772 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] [2021-11-07 08:09:22,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 08:09:22,772 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 08:09:22,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:22,773 INFO L85 PathProgramCache]: Analyzing trace with hash 2125982373, now seen corresponding path program 1 times [2021-11-07 08:09:22,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:22,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877019634] [2021-11-07 08:09:22,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:22,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:22,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:22,860 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 08:09:22,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:22,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877019634] [2021-11-07 08:09:22,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877019634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:22,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:22,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:09:22,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068785716] [2021-11-07 08:09:22,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:09:22,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:22,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:09:22,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:09:22,864 INFO L87 Difference]: Start difference. First operand 8430 states and 15830 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 08:09:26,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:26,331 INFO L93 Difference]: Finished difference Result 22827 states and 42801 transitions. [2021-11-07 08:09:26,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:09:26,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-11-07 08:09:26,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:26,365 INFO L225 Difference]: With dead ends: 22827 [2021-11-07 08:09:26,365 INFO L226 Difference]: Without dead ends: 14434 [2021-11-07 08:09:26,377 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 08:09:26,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14434 states. [2021-11-07 08:09:26,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14434 to 8430. [2021-11-07 08:09:26,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8430 states, 8425 states have (on average 1.8308605341246291) internal successors, (15425), 8429 states have internal predecessors, (15425), 0 states have call successors, (0), 0 states 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 08:09:26,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8430 states to 8430 states and 15425 transitions. [2021-11-07 08:09:26,973 INFO L78 Accepts]: Start accepts. Automaton has 8430 states and 15425 transitions. Word has length 60 [2021-11-07 08:09:26,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:26,974 INFO L470 AbstractCegarLoop]: Abstraction has 8430 states and 15425 transitions. [2021-11-07 08:09:26,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 08:09:26,974 INFO L276 IsEmpty]: Start isEmpty. Operand 8430 states and 15425 transitions. [2021-11-07 08:09:26,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 08:09:26,978 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:26,978 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 08:09:26,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 08:09:26,979 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 08:09:26,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:26,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1379453895, now seen corresponding path program 1 times [2021-11-07 08:09:26,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:26,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232461645] [2021-11-07 08:09:26,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:26,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:27,111 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 08:09:27,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:27,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232461645] [2021-11-07 08:09:27,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232461645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:27,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:27,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:09:27,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808918889] [2021-11-07 08:09:27,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:09:27,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:27,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:09:27,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:09:27,116 INFO L87 Difference]: Start difference. First operand 8430 states and 15425 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 08:09:33,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:33,848 INFO L93 Difference]: Finished difference Result 58913 states and 109085 transitions. [2021-11-07 08:09:33,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:09:33,849 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 08:09:33,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:33,952 INFO L225 Difference]: With dead ends: 58913 [2021-11-07 08:09:33,953 INFO L226 Difference]: Without dead ends: 50547 [2021-11-07 08:09:33,976 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:09:34,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50547 states. [2021-11-07 08:09:35,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50547 to 16635. [2021-11-07 08:09:35,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16635 states, 16630 states have (on average 1.832892363199038) internal successors, (30481), 16634 states have internal predecessors, (30481), 0 states have call successors, (0), 0 states 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 08:09:35,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16635 states to 16635 states and 30481 transitions. [2021-11-07 08:09:35,554 INFO L78 Accepts]: Start accepts. Automaton has 16635 states and 30481 transitions. Word has length 68 [2021-11-07 08:09:35,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:35,556 INFO L470 AbstractCegarLoop]: Abstraction has 16635 states and 30481 transitions. [2021-11-07 08:09:35,557 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 08:09:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand 16635 states and 30481 transitions. [2021-11-07 08:09:35,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 08:09:35,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:35,564 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 08:09:35,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:09:35,565 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 08:09:35,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:35,565 INFO L85 PathProgramCache]: Analyzing trace with hash 862258006, now seen corresponding path program 1 times [2021-11-07 08:09:35,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:35,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505607925] [2021-11-07 08:09:35,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:35,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:35,711 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 08:09:35,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:35,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505607925] [2021-11-07 08:09:35,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505607925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:35,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:35,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:09:35,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747916213] [2021-11-07 08:09:35,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:09:35,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:35,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:09:35,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:09:35,715 INFO L87 Difference]: Start difference. First operand 16635 states and 30481 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) 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 08:09:40,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:40,987 INFO L93 Difference]: Finished difference Result 50559 states and 93531 transitions. [2021-11-07 08:09:40,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 08:09:40,987 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) 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 08:09:40,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:41,048 INFO L225 Difference]: With dead ends: 50559 [2021-11-07 08:09:41,049 INFO L226 Difference]: Without dead ends: 43990 [2021-11-07 08:09:41,065 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:09:41,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43990 states. [2021-11-07 08:09:41,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43990 to 16625. [2021-11-07 08:09:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16625 states, 16620 states have (on average 1.8327918170878459) internal successors, (30461), 16624 states have internal predecessors, (30461), 0 states have call successors, (0), 0 states 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 08:09:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16625 states to 16625 states and 30461 transitions. [2021-11-07 08:09:41,988 INFO L78 Accepts]: Start accepts. Automaton has 16625 states and 30461 transitions. Word has length 71 [2021-11-07 08:09:41,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:41,988 INFO L470 AbstractCegarLoop]: Abstraction has 16625 states and 30461 transitions. [2021-11-07 08:09:41,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) 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 08:09:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 16625 states and 30461 transitions. [2021-11-07 08:09:41,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 08:09:41,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:41,995 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 08:09:41,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 08:09:41,995 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 08:09:41,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:41,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1058852895, now seen corresponding path program 1 times [2021-11-07 08:09:41,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:41,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828585413] [2021-11-07 08:09:41,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:41,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:42,053 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 08:09:42,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:42,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828585413] [2021-11-07 08:09:42,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828585413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:42,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:42,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:09:42,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702587534] [2021-11-07 08:09:42,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:09:42,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:42,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:09:42,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:09:42,056 INFO L87 Difference]: Start difference. First operand 16625 states and 30461 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 08:09:42,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:42,614 INFO L93 Difference]: Finished difference Result 24835 states and 45511 transitions. [2021-11-07 08:09:42,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:09:42,614 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 08:09:42,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:42,625 INFO L225 Difference]: With dead ends: 24835 [2021-11-07 08:09:42,625 INFO L226 Difference]: Without dead ends: 8235 [2021-11-07 08:09:42,636 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:09:42,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8235 states. [2021-11-07 08:09:42,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8235 to 8235. [2021-11-07 08:09:42,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8235 states, 8230 states have (on average 1.8318347509113002) internal successors, (15076), 8234 states have internal predecessors, (15076), 0 states have call successors, (0), 0 states 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 08:09:42,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8235 states to 8235 states and 15076 transitions. [2021-11-07 08:09:42,997 INFO L78 Accepts]: Start accepts. Automaton has 8235 states and 15076 transitions. Word has length 71 [2021-11-07 08:09:42,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:42,997 INFO L470 AbstractCegarLoop]: Abstraction has 8235 states and 15076 transitions. [2021-11-07 08:09:42,997 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 08:09:42,997 INFO L276 IsEmpty]: Start isEmpty. Operand 8235 states and 15076 transitions. [2021-11-07 08:09:43,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 08:09:43,002 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:43,002 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 08:09:43,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 08:09:43,003 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 08:09:43,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:43,003 INFO L85 PathProgramCache]: Analyzing trace with hash 333616612, now seen corresponding path program 1 times [2021-11-07 08:09:43,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:43,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046919334] [2021-11-07 08:09:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:43,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:43,079 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 08:09:43,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:43,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046919334] [2021-11-07 08:09:43,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046919334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:43,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:43,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:09:43,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791411968] [2021-11-07 08:09:43,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:09:43,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:43,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:09:43,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:09:43,085 INFO L87 Difference]: Start difference. First operand 8235 states and 15076 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:44,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:44,035 INFO L93 Difference]: Finished difference Result 19358 states and 35466 transitions. [2021-11-07 08:09:44,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:09:44,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 08:09:44,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:44,056 INFO L225 Difference]: With dead ends: 19358 [2021-11-07 08:09:44,057 INFO L226 Difference]: Without dead ends: 12420 [2021-11-07 08:09:44,069 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 08:09:44,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12420 states. [2021-11-07 08:09:44,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12420 to 12405. [2021-11-07 08:09:44,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12405 states, 12400 states have (on average 1.8324193548387098) internal successors, (22722), 12404 states have internal predecessors, (22722), 0 states have call successors, (0), 0 states 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 08:09:44,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12405 states to 12405 states and 22722 transitions. [2021-11-07 08:09:44,877 INFO L78 Accepts]: Start accepts. Automaton has 12405 states and 22722 transitions. Word has length 77 [2021-11-07 08:09:44,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:44,877 INFO L470 AbstractCegarLoop]: Abstraction has 12405 states and 22722 transitions. [2021-11-07 08:09:44,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:44,878 INFO L276 IsEmpty]: Start isEmpty. Operand 12405 states and 22722 transitions. [2021-11-07 08:09:44,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 08:09:44,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:44,883 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:44,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 08:09:44,884 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 08:09:44,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:44,884 INFO L85 PathProgramCache]: Analyzing trace with hash 867066484, now seen corresponding path program 1 times [2021-11-07 08:09:44,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:44,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025256827] [2021-11-07 08:09:44,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:44,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:44,962 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 08:09:44,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:44,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025256827] [2021-11-07 08:09:44,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025256827] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:44,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:44,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:09:44,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498678571] [2021-11-07 08:09:44,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:09:44,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:44,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:09:44,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:09:44,966 INFO L87 Difference]: Start difference. First operand 12405 states and 22722 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:46,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:46,106 INFO L93 Difference]: Finished difference Result 31160 states and 57095 transitions. [2021-11-07 08:09:46,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:09:46,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 08:09:46,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:46,136 INFO L225 Difference]: With dead ends: 31160 [2021-11-07 08:09:46,137 INFO L226 Difference]: Without dead ends: 20667 [2021-11-07 08:09:46,146 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 08:09:46,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20667 states. [2021-11-07 08:09:47,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20667 to 20652. [2021-11-07 08:09:47,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20652 states, 20647 states have (on average 1.8334382719039086) internal successors, (37855), 20651 states have internal predecessors, (37855), 0 states have call successors, (0), 0 states 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 08:09:47,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20652 states to 20652 states and 37855 transitions. [2021-11-07 08:09:47,174 INFO L78 Accepts]: Start accepts. Automaton has 20652 states and 37855 transitions. Word has length 78 [2021-11-07 08:09:47,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:47,174 INFO L470 AbstractCegarLoop]: Abstraction has 20652 states and 37855 transitions. [2021-11-07 08:09:47,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:47,174 INFO L276 IsEmpty]: Start isEmpty. Operand 20652 states and 37855 transitions. [2021-11-07 08:09:47,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 08:09:47,179 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:47,179 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:47,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 08:09:47,180 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 08:09:47,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:47,181 INFO L85 PathProgramCache]: Analyzing trace with hash -2141968855, now seen corresponding path program 1 times [2021-11-07 08:09:47,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:47,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64003222] [2021-11-07 08:09:47,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:47,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:47,255 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 08:09:47,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:47,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64003222] [2021-11-07 08:09:47,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64003222] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:47,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:47,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:09:47,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485777362] [2021-11-07 08:09:47,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:09:47,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:47,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:09:47,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:09:47,259 INFO L87 Difference]: Start difference. First operand 20652 states and 37855 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:49,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:49,217 INFO L93 Difference]: Finished difference Result 54578 states and 100010 transitions. [2021-11-07 08:09:49,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:09:49,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 08:09:49,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:49,324 INFO L225 Difference]: With dead ends: 54578 [2021-11-07 08:09:49,325 INFO L226 Difference]: Without dead ends: 36955 [2021-11-07 08:09:49,349 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 08:09:49,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36955 states. [2021-11-07 08:09:51,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36955 to 36940. [2021-11-07 08:09:51,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36940 states, 36935 states have (on average 1.8335183430350617) internal successors, (67721), 36939 states have internal predecessors, (67721), 0 states have call successors, (0), 0 states 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 08:09:51,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36940 states to 36940 states and 67721 transitions. [2021-11-07 08:09:51,266 INFO L78 Accepts]: Start accepts. Automaton has 36940 states and 67721 transitions. Word has length 79 [2021-11-07 08:09:51,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:51,266 INFO L470 AbstractCegarLoop]: Abstraction has 36940 states and 67721 transitions. [2021-11-07 08:09:51,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:51,266 INFO L276 IsEmpty]: Start isEmpty. Operand 36940 states and 67721 transitions. [2021-11-07 08:09:51,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 08:09:51,272 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:51,272 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:51,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 08:09:51,273 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 08:09:51,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:51,273 INFO L85 PathProgramCache]: Analyzing trace with hash 996071257, now seen corresponding path program 1 times [2021-11-07 08:09:51,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:51,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563690129] [2021-11-07 08:09:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:51,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:51,343 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 08:09:51,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:51,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563690129] [2021-11-07 08:09:51,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563690129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:51,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:51,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:09:51,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914670155] [2021-11-07 08:09:51,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:09:51,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:51,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:09:51,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:09:51,346 INFO L87 Difference]: Start difference. First operand 36940 states and 67721 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 08:09:54,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:54,659 INFO L93 Difference]: Finished difference Result 101002 states and 184991 transitions. [2021-11-07 08:09:54,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:09:54,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-11-07 08:09:54,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:54,777 INFO L225 Difference]: With dead ends: 101002 [2021-11-07 08:09:54,777 INFO L226 Difference]: Without dead ends: 69099 [2021-11-07 08:09:54,805 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 08:09:54,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69099 states. [2021-11-07 08:09:58,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69099 to 69084. [2021-11-07 08:09:58,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69084 states, 69079 states have (on average 1.8322645087508505) internal successors, (126571), 69083 states have internal predecessors, (126571), 0 states have call successors, (0), 0 states 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 08:09:58,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69084 states to 69084 states and 126571 transitions. [2021-11-07 08:09:58,689 INFO L78 Accepts]: Start accepts. Automaton has 69084 states and 126571 transitions. Word has length 80 [2021-11-07 08:09:58,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:58,689 INFO L470 AbstractCegarLoop]: Abstraction has 69084 states and 126571 transitions. [2021-11-07 08:09:58,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 08:09:58,689 INFO L276 IsEmpty]: Start isEmpty. Operand 69084 states and 126571 transitions. [2021-11-07 08:09:58,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 08:09:58,693 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:58,693 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:58,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 08:09:58,693 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 08:09:58,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:58,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1419922030, now seen corresponding path program 1 times [2021-11-07 08:09:58,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:58,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733522124] [2021-11-07 08:09:58,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:58,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:58,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:58,767 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 08:09:58,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:58,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733522124] [2021-11-07 08:09:58,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733522124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:58,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:58,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:09:58,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017950241] [2021-11-07 08:09:58,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:09:58,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:58,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:09:58,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:09:58,770 INFO L87 Difference]: Start difference. First operand 69084 states and 126571 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 08:10:04,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:04,904 INFO L93 Difference]: Finished difference Result 192986 states and 353082 transitions. [2021-11-07 08:10:04,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:10:04,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-07 08:10:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:05,408 INFO L225 Difference]: With dead ends: 192986 [2021-11-07 08:10:05,408 INFO L226 Difference]: Without dead ends: 132503 [2021-11-07 08:10:05,463 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 08:10:05,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132503 states.