./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_product18.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_88192466-7c8b-436f-ac59-c175a1f5e4cd/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88192466-7c8b-436f-ac59-c175a1f5e4cd/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_88192466-7c8b-436f-ac59-c175a1f5e4cd/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88192466-7c8b-436f-ac59-c175a1f5e4cd/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88192466-7c8b-436f-ac59-c175a1f5e4cd/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_88192466-7c8b-436f-ac59-c175a1f5e4cd/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 58fd69d2f74506159a7a57598b08a18ff098ebf1233f7e6688a335d4e30dd566 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:38:42,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:38:42,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:38:42,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:38:42,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:38:42,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:38:42,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:38:42,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:38:42,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:38:42,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:38:42,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:38:42,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:38:42,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:38:42,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:38:42,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:38:42,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:38:42,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:38:42,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:38:42,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:38:42,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:38:42,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:38:42,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:38:42,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:38:42,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:38:42,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:38:42,267 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:38:42,268 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:38:42,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:38:42,271 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:38:42,272 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:38:42,273 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:38:42,274 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:38:42,276 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:38:42,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:38:42,280 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:38:42,280 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:38:42,281 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:38:42,281 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:38:42,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:38:42,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:38:42,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:38:42,285 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88192466-7c8b-436f-ac59-c175a1f5e4cd/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:38:42,335 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:38:42,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:38:42,336 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:38:42,336 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:38:42,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:38:42,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:38:42,338 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:38:42,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:38:42,339 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:38:42,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:38:42,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:38:42,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:38:42,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:38:42,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:38:42,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:38:42,342 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:38:42,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:38:42,342 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:38:42,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:38:42,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:38:42,343 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:38:42,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:38:42,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:38:42,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:38:42,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:38:42,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:38:42,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:38:42,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:38:42,345 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:38:42,347 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:38:42,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:38:42,347 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:38:42,348 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_88192466-7c8b-436f-ac59-c175a1f5e4cd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88192466-7c8b-436f-ac59-c175a1f5e4cd/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 58fd69d2f74506159a7a57598b08a18ff098ebf1233f7e6688a335d4e30dd566 [2021-11-07 08:38:42,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:38:42,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:38:42,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:38:42,725 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:38:42,726 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:38:42,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88192466-7c8b-436f-ac59-c175a1f5e4cd/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/product-lines/email_spec11_product18.cil.c [2021-11-07 08:38:42,797 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88192466-7c8b-436f-ac59-c175a1f5e4cd/bin/uautomizer-AkOaLMaTGY/data/fa2ab6ba6/4bafbea18b7e43fa85f88064b1f27a04/FLAG0367a13d5 [2021-11-07 08:38:43,605 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:38:43,606 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88192466-7c8b-436f-ac59-c175a1f5e4cd/sv-benchmarks/c/product-lines/email_spec11_product18.cil.c [2021-11-07 08:38:43,638 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88192466-7c8b-436f-ac59-c175a1f5e4cd/bin/uautomizer-AkOaLMaTGY/data/fa2ab6ba6/4bafbea18b7e43fa85f88064b1f27a04/FLAG0367a13d5 [2021-11-07 08:38:43,755 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88192466-7c8b-436f-ac59-c175a1f5e4cd/bin/uautomizer-AkOaLMaTGY/data/fa2ab6ba6/4bafbea18b7e43fa85f88064b1f27a04 [2021-11-07 08:38:43,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:38:43,760 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:38:43,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:38:43,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:38:43,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:38:43,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:38:43" (1/1) ... [2021-11-07 08:38:43,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ba58dd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:43, skipping insertion in model container [2021-11-07 08:38:43,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:38:43" (1/1) ... [2021-11-07 08:38:43,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:38:43,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:38:44,635 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_88192466-7c8b-436f-ac59-c175a1f5e4cd/sv-benchmarks/c/product-lines/email_spec11_product18.cil.c[57905,57918] [2021-11-07 08:38:44,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:38:44,687 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:38:44,808 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_88192466-7c8b-436f-ac59-c175a1f5e4cd/sv-benchmarks/c/product-lines/email_spec11_product18.cil.c[57905,57918] [2021-11-07 08:38:44,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:38:44,869 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:38:44,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:44 WrapperNode [2021-11-07 08:38:44,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:38:44,871 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:38:44,872 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:38:44,872 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:38:44,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:44" (1/1) ... [2021-11-07 08:38:44,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:44" (1/1) ... [2021-11-07 08:38:45,035 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:38:45,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:38:45,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:38:45,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:38:45,045 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:44" (1/1) ... [2021-11-07 08:38:45,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:44" (1/1) ... [2021-11-07 08:38:45,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:44" (1/1) ... [2021-11-07 08:38:45,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:44" (1/1) ... [2021-11-07 08:38:45,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:44" (1/1) ... [2021-11-07 08:38:45,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:44" (1/1) ... [2021-11-07 08:38:45,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:44" (1/1) ... [2021-11-07 08:38:45,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:38:45,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:38:45,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:38:45,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:38:45,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:44" (1/1) ... [2021-11-07 08:38:45,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:38:45,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88192466-7c8b-436f-ac59-c175a1f5e4cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:45,247 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88192466-7c8b-436f-ac59-c175a1f5e4cd/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:38:45,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88192466-7c8b-436f-ac59-c175a1f5e4cd/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:38:45,312 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 08:38:45,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:38:45,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:38:45,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:38:45,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:38:47,783 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:38:47,783 INFO L299 CfgBuilder]: Removed 259 assume(true) statements. [2021-11-07 08:38:47,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:38:47 BoogieIcfgContainer [2021-11-07 08:38:47,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:38:47,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:38:47,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:38:47,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:38:47,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:38:43" (1/3) ... [2021-11-07 08:38:47,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ec74dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:38:47, skipping insertion in model container [2021-11-07 08:38:47,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:44" (2/3) ... [2021-11-07 08:38:47,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ec74dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:38:47, skipping insertion in model container [2021-11-07 08:38:47,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:38:47" (3/3) ... [2021-11-07 08:38:47,798 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product18.cil.c [2021-11-07 08:38:47,806 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:38:47,806 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 08:38:47,872 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:38:47,879 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 08:38:47,880 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 08:38:47,905 INFO L276 IsEmpty]: Start isEmpty. Operand has 397 states, 394 states have (on average 1.7614213197969544) internal successors, (694), 396 states have internal predecessors, (694), 0 states have call successors, (0), 0 states 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 08:38:47,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 08:38:47,919 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:47,920 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] [2021-11-07 08:38:47,921 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:38:47,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:47,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1400822452, now seen corresponding path program 1 times [2021-11-07 08:38:47,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:47,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346983939] [2021-11-07 08:38:47,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:47,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:48,415 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 08:38:48,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:48,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346983939] [2021-11-07 08:38:48,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346983939] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:48,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:48,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:38:48,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079097094] [2021-11-07 08:38:48,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:38:48,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:48,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:38:48,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:38:48,449 INFO L87 Difference]: Start difference. First operand has 397 states, 394 states have (on average 1.7614213197969544) internal successors, (694), 396 states have internal predecessors, (694), 0 states have call successors, (0), 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 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 08:38:48,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:48,742 INFO L93 Difference]: Finished difference Result 1156 states and 2024 transitions. [2021-11-07 08:38:48,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:38:48,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-11-07 08:38:48,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:48,779 INFO L225 Difference]: With dead ends: 1156 [2021-11-07 08:38:48,780 INFO L226 Difference]: Without dead ends: 752 [2021-11-07 08:38:48,791 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 08:38:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-11-07 08:38:48,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 385. [2021-11-07 08:38:48,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 383 states have (on average 1.7441253263707572) internal successors, (668), 384 states have internal predecessors, (668), 0 states have call successors, (0), 0 states 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 08:38:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 668 transitions. [2021-11-07 08:38:48,918 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 668 transitions. Word has length 45 [2021-11-07 08:38:48,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:48,919 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 668 transitions. [2021-11-07 08:38:48,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 08:38:48,920 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 668 transitions. [2021-11-07 08:38:48,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 08:38:48,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:48,934 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] [2021-11-07 08:38:48,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:38:48,935 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:38:48,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:48,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1435806119, now seen corresponding path program 1 times [2021-11-07 08:38:48,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:48,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913142063] [2021-11-07 08:38:48,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:48,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:49,162 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 08:38:49,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:49,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913142063] [2021-11-07 08:38:49,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913142063] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:49,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:49,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:38:49,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946286374] [2021-11-07 08:38:49,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:38:49,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:49,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:38:49,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:38:49,169 INFO L87 Difference]: Start difference. First operand 385 states and 668 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 08:38:49,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:49,384 INFO L93 Difference]: Finished difference Result 1104 states and 1920 transitions. [2021-11-07 08:38:49,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:38:49,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-11-07 08:38:49,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:49,392 INFO L225 Difference]: With dead ends: 1104 [2021-11-07 08:38:49,392 INFO L226 Difference]: Without dead ends: 738 [2021-11-07 08:38:49,394 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:38:49,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-11-07 08:38:49,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 385. [2021-11-07 08:38:49,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 383 states have (on average 1.7415143603133159) internal successors, (667), 384 states have internal predecessors, (667), 0 states have call successors, (0), 0 states 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 08:38:49,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 667 transitions. [2021-11-07 08:38:49,430 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 667 transitions. Word has length 47 [2021-11-07 08:38:49,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:49,431 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 667 transitions. [2021-11-07 08:38:49,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 08:38:49,431 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 667 transitions. [2021-11-07 08:38:49,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 08:38:49,435 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:49,435 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] [2021-11-07 08:38:49,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:38:49,437 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:38:49,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:49,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1947061100, now seen corresponding path program 1 times [2021-11-07 08:38:49,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:49,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954351645] [2021-11-07 08:38:49,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:49,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:49,603 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 08:38:49,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:49,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954351645] [2021-11-07 08:38:49,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954351645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:49,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:49,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:38:49,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825844960] [2021-11-07 08:38:49,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:38:49,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:49,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:38:49,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:38:49,608 INFO L87 Difference]: Start difference. First operand 385 states and 667 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 08:38:49,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:49,653 INFO L93 Difference]: Finished difference Result 752 states and 1308 transitions. [2021-11-07 08:38:49,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:38:49,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-11-07 08:38:49,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:49,657 INFO L225 Difference]: With dead ends: 752 [2021-11-07 08:38:49,658 INFO L226 Difference]: Without dead ends: 390 [2021-11-07 08:38:49,659 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 08:38:49,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-07 08:38:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 385. [2021-11-07 08:38:49,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 383 states have (on average 1.7389033942558747) internal successors, (666), 384 states have internal predecessors, (666), 0 states have call successors, (0), 0 states 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 08:38:49,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 666 transitions. [2021-11-07 08:38:49,681 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 666 transitions. Word has length 48 [2021-11-07 08:38:49,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:49,682 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 666 transitions. [2021-11-07 08:38:49,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 08:38:49,682 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 666 transitions. [2021-11-07 08:38:49,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 08:38:49,685 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:49,685 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:49,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:38:49,686 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:38:49,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:49,687 INFO L85 PathProgramCache]: Analyzing trace with hash 140592614, now seen corresponding path program 1 times [2021-11-07 08:38:49,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:49,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269932667] [2021-11-07 08:38:49,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:49,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:49,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:49,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:49,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269932667] [2021-11-07 08:38:49,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269932667] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:49,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:49,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:38:49,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166151543] [2021-11-07 08:38:49,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:38:49,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:49,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:38:49,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:38:49,833 INFO L87 Difference]: Start difference. First operand 385 states and 666 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:49,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:49,896 INFO L93 Difference]: Finished difference Result 762 states and 1321 transitions. [2021-11-07 08:38:49,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:38:49,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 08:38:49,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:49,904 INFO L225 Difference]: With dead ends: 762 [2021-11-07 08:38:49,904 INFO L226 Difference]: Without dead ends: 385 [2021-11-07 08:38:49,906 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 08:38:49,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-07 08:38:49,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2021-11-07 08:38:49,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 383 states have (on average 1.7336814621409922) internal successors, (664), 384 states have internal predecessors, (664), 0 states have call successors, (0), 0 states 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 08:38:49,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 664 transitions. [2021-11-07 08:38:49,927 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 664 transitions. Word has length 49 [2021-11-07 08:38:49,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:49,928 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 664 transitions. [2021-11-07 08:38:49,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:49,929 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 664 transitions. [2021-11-07 08:38:49,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 08:38:49,931 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:49,931 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:49,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:38:49,932 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:38:49,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:49,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1941161649, now seen corresponding path program 1 times [2021-11-07 08:38:49,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:49,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667802562] [2021-11-07 08:38:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:49,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:50,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:50,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667802562] [2021-11-07 08:38:50,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667802562] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:50,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:50,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:38:50,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834645765] [2021-11-07 08:38:50,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:38:50,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:50,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:38:50,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:38:50,086 INFO L87 Difference]: Start difference. First operand 385 states and 664 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:50,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:50,270 INFO L93 Difference]: Finished difference Result 1094 states and 1900 transitions. [2021-11-07 08:38:50,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:38:50,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 08:38:50,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:50,278 INFO L225 Difference]: With dead ends: 1094 [2021-11-07 08:38:50,278 INFO L226 Difference]: Without dead ends: 736 [2021-11-07 08:38:50,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:38:50,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-11-07 08:38:50,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 385. [2021-11-07 08:38:50,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 383 states have (on average 1.731070496083551) internal successors, (663), 384 states have internal predecessors, (663), 0 states have call successors, (0), 0 states 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 08:38:50,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 663 transitions. [2021-11-07 08:38:50,306 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 663 transitions. Word has length 50 [2021-11-07 08:38:50,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:50,307 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 663 transitions. [2021-11-07 08:38:50,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:50,308 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 663 transitions. [2021-11-07 08:38:50,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 08:38:50,311 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:50,311 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:50,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:38:50,312 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:38:50,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:50,313 INFO L85 PathProgramCache]: Analyzing trace with hash -50501714, now seen corresponding path program 1 times [2021-11-07 08:38:50,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:50,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967863836] [2021-11-07 08:38:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:50,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:50,468 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 08:38:50,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:50,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967863836] [2021-11-07 08:38:50,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967863836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:50,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:50,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:38:50,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108154546] [2021-11-07 08:38:50,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:38:50,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:50,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:38:50,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:38:50,478 INFO L87 Difference]: Start difference. First operand 385 states and 663 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:50,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:50,671 INFO L93 Difference]: Finished difference Result 1099 states and 1905 transitions. [2021-11-07 08:38:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:38:50,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 08:38:50,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:50,678 INFO L225 Difference]: With dead ends: 1099 [2021-11-07 08:38:50,679 INFO L226 Difference]: Without dead ends: 741 [2021-11-07 08:38:50,680 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 08:38:50,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-11-07 08:38:50,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 385. [2021-11-07 08:38:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 383 states have (on average 1.7284595300261096) internal successors, (662), 384 states have internal predecessors, (662), 0 states have call successors, (0), 0 states 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 08:38:50,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 662 transitions. [2021-11-07 08:38:50,713 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 662 transitions. Word has length 51 [2021-11-07 08:38:50,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:50,714 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 662 transitions. [2021-11-07 08:38:50,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:50,715 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 662 transitions. [2021-11-07 08:38:50,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:38:50,716 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:50,716 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:50,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:38:50,717 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:38:50,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:50,718 INFO L85 PathProgramCache]: Analyzing trace with hash 91475862, now seen corresponding path program 1 times [2021-11-07 08:38:50,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:50,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174895956] [2021-11-07 08:38:50,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:50,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:50,786 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 08:38:50,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:50,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174895956] [2021-11-07 08:38:50,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174895956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:50,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:50,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:38:50,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493858882] [2021-11-07 08:38:50,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:38:50,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:50,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:38:50,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:38:50,790 INFO L87 Difference]: Start difference. First operand 385 states and 662 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:50,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:50,824 INFO L93 Difference]: Finished difference Result 532 states and 900 transitions. [2021-11-07 08:38:50,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:38:50,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 08:38:50,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:50,829 INFO L225 Difference]: With dead ends: 532 [2021-11-07 08:38:50,829 INFO L226 Difference]: Without dead ends: 388 [2021-11-07 08:38:50,830 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 08:38:50,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-07 08:38:50,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 387. [2021-11-07 08:38:50,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 385 states have (on average 1.7246753246753246) internal successors, (664), 386 states have internal predecessors, (664), 0 states have call successors, (0), 0 states 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 08:38:50,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 664 transitions. [2021-11-07 08:38:50,860 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 664 transitions. Word has length 52 [2021-11-07 08:38:50,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:50,860 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 664 transitions. [2021-11-07 08:38:50,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:50,861 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 664 transitions. [2021-11-07 08:38:50,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 08:38:50,862 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:50,863 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:50,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:38:50,863 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:38:50,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:50,864 INFO L85 PathProgramCache]: Analyzing trace with hash -219376792, now seen corresponding path program 1 times [2021-11-07 08:38:50,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:50,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706164386] [2021-11-07 08:38:50,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:50,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:50,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:50,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706164386] [2021-11-07 08:38:50,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706164386] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:50,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:50,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:38:50,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674285280] [2021-11-07 08:38:50,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:38:50,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:50,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:38:50,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:38:50,968 INFO L87 Difference]: Start difference. First operand 387 states and 664 transitions. Second operand has 3 states, 3 states have (on average 20.0) 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 08:38:51,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:51,030 INFO L93 Difference]: Finished difference Result 1047 states and 1816 transitions. [2021-11-07 08:38:51,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:38:51,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) 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 08:38:51,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:51,037 INFO L225 Difference]: With dead ends: 1047 [2021-11-07 08:38:51,038 INFO L226 Difference]: Without dead ends: 691 [2021-11-07 08:38:51,039 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 08:38:51,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-11-07 08:38:51,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 547. [2021-11-07 08:38:51,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 545 states have (on average 1.7559633027522936) internal successors, (957), 546 states have internal predecessors, (957), 0 states have call successors, (0), 0 states 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 08:38:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 957 transitions. [2021-11-07 08:38:51,087 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 957 transitions. Word has length 60 [2021-11-07 08:38:51,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:51,088 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 957 transitions. [2021-11-07 08:38:51,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) 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 08:38:51,088 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 957 transitions. [2021-11-07 08:38:51,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 08:38:51,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:51,090 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:51,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:38:51,091 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:38:51,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:51,092 INFO L85 PathProgramCache]: Analyzing trace with hash 601234409, now seen corresponding path program 1 times [2021-11-07 08:38:51,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:51,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135705020] [2021-11-07 08:38:51,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:51,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:51,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:51,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135705020] [2021-11-07 08:38:51,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135705020] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:51,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:51,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:38:51,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876070187] [2021-11-07 08:38:51,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:38:51,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:51,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:38:51,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:38:51,180 INFO L87 Difference]: Start difference. First operand 547 states and 957 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 08:38:51,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:51,617 INFO L93 Difference]: Finished difference Result 1571 states and 2777 transitions. [2021-11-07 08:38:51,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:38:51,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-11-07 08:38:51,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:51,627 INFO L225 Difference]: With dead ends: 1571 [2021-11-07 08:38:51,628 INFO L226 Difference]: Without dead ends: 1055 [2021-11-07 08:38:51,629 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:38:51,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-11-07 08:38:51,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 547. [2021-11-07 08:38:51,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 545 states have (on average 1.7522935779816513) internal successors, (955), 546 states have internal predecessors, (955), 0 states have call successors, (0), 0 states 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 08:38:51,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 955 transitions. [2021-11-07 08:38:51,725 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 955 transitions. Word has length 61 [2021-11-07 08:38:51,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:51,726 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 955 transitions. [2021-11-07 08:38:51,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 08:38:51,726 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 955 transitions. [2021-11-07 08:38:51,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 08:38:51,728 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:51,729 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:51,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:38:51,729 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:38:51,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:51,730 INFO L85 PathProgramCache]: Analyzing trace with hash 422054258, now seen corresponding path program 1 times [2021-11-07 08:38:51,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:51,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751219908] [2021-11-07 08:38:51,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:51,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:51,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:51,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751219908] [2021-11-07 08:38:51,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751219908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:51,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:51,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:38:51,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768833821] [2021-11-07 08:38:51,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:38:51,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:51,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:38:51,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:38:51,821 INFO L87 Difference]: Start difference. First operand 547 states and 955 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:51,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:51,925 INFO L93 Difference]: Finished difference Result 1569 states and 2769 transitions. [2021-11-07 08:38:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:38:51,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 08:38:51,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:51,935 INFO L225 Difference]: With dead ends: 1569 [2021-11-07 08:38:51,935 INFO L226 Difference]: Without dead ends: 1053 [2021-11-07 08:38:51,937 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 08:38:51,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-11-07 08:38:52,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 909. [2021-11-07 08:38:52,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 907 states have (on average 1.7839029768467476) internal successors, (1618), 908 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states 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 08:38:52,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1618 transitions. [2021-11-07 08:38:52,017 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1618 transitions. Word has length 62 [2021-11-07 08:38:52,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:52,018 INFO L470 AbstractCegarLoop]: Abstraction has 909 states and 1618 transitions. [2021-11-07 08:38:52,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1618 transitions. [2021-11-07 08:38:52,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 08:38:52,021 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:52,021 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:52,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:38:52,022 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:38:52,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:52,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1136277356, now seen corresponding path program 1 times [2021-11-07 08:38:52,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:52,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345844166] [2021-11-07 08:38:52,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:52,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:52,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:52,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345844166] [2021-11-07 08:38:52,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345844166] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:52,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114413328] [2021-11-07 08:38:52,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:52,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:52,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88192466-7c8b-436f-ac59-c175a1f5e4cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:52,137 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88192466-7c8b-436f-ac59-c175a1f5e4cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:52,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88192466-7c8b-436f-ac59-c175a1f5e4cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:38:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:52,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:38:52,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:52,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114413328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:52,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:52,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-07 08:38:52,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658149618] [2021-11-07 08:38:52,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:38:52,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:52,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:38:52,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:38:52,758 INFO L87 Difference]: Start difference. First operand 909 states and 1618 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:52,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:52,870 INFO L93 Difference]: Finished difference Result 1416 states and 2482 transitions. [2021-11-07 08:38:52,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:38:52,871 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 08:38:52,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:52,881 INFO L225 Difference]: With dead ends: 1416 [2021-11-07 08:38:52,881 INFO L226 Difference]: Without dead ends: 1272 [2021-11-07 08:38:52,882 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:38:52,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-11-07 08:38:52,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1125. [2021-11-07 08:38:52,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1123 states have (on average 1.7880676758682101) internal successors, (2008), 1124 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 08:38:52,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 2008 transitions. [2021-11-07 08:38:52,982 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 2008 transitions. Word has length 62 [2021-11-07 08:38:52,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:52,982 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 2008 transitions. [2021-11-07 08:38:52,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:52,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 2008 transitions. [2021-11-07 08:38:52,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 08:38:52,991 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:52,991 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:53,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88192466-7c8b-436f-ac59-c175a1f5e4cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:53,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88192466-7c8b-436f-ac59-c175a1f5e4cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:53,217 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:38:53,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:53,218 INFO L85 PathProgramCache]: Analyzing trace with hash 390986551, now seen corresponding path program 1 times [2021-11-07 08:38:53,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:53,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409119536] [2021-11-07 08:38:53,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:53,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:53,299 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 08:38:53,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:53,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409119536] [2021-11-07 08:38:53,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409119536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:53,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:53,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:38:53,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007671265] [2021-11-07 08:38:53,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:38:53,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:53,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:38:53,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:38:53,303 INFO L87 Difference]: Start difference. First operand 1125 states and 2008 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:53,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:53,467 INFO L93 Difference]: Finished difference Result 3009 states and 5398 transitions. [2021-11-07 08:38:53,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:38:53,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 08:38:53,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:53,482 INFO L225 Difference]: With dead ends: 3009 [2021-11-07 08:38:53,483 INFO L226 Difference]: Without dead ends: 1985 [2021-11-07 08:38:53,487 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 08:38:53,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-11-07 08:38:53,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1841. [2021-11-07 08:38:53,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1839 states have (on average 1.8015225666122894) internal successors, (3313), 1840 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states 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 08:38:53,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 3313 transitions. [2021-11-07 08:38:53,634 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 3313 transitions. Word has length 66 [2021-11-07 08:38:53,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:53,635 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 3313 transitions. [2021-11-07 08:38:53,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:53,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 3313 transitions. [2021-11-07 08:38:53,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 08:38:53,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:53,640 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] [2021-11-07 08:38:53,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 08:38:53,641 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:38:53,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:53,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1611877815, now seen corresponding path program 1 times [2021-11-07 08:38:53,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:53,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165584236] [2021-11-07 08:38:53,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:53,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:53,733 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 08:38:53,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:53,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165584236] [2021-11-07 08:38:53,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165584236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:53,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:53,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:38:53,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314581678] [2021-11-07 08:38:53,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:38:53,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:53,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:38:53,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:38:53,737 INFO L87 Difference]: Start difference. First operand 1841 states and 3313 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:53,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:53,976 INFO L93 Difference]: Finished difference Result 4893 states and 8832 transitions. [2021-11-07 08:38:53,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:38:53,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 08:38:53,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:54,002 INFO L225 Difference]: With dead ends: 4893 [2021-11-07 08:38:54,002 INFO L226 Difference]: Without dead ends: 3187 [2021-11-07 08:38:54,006 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 08:38:54,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-11-07 08:38:54,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 3043. [2021-11-07 08:38:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 3041 states have (on average 1.807957908582703) internal successors, (5498), 3042 states have internal predecessors, (5498), 0 states have call successors, (0), 0 states 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 08:38:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 5498 transitions. [2021-11-07 08:38:54,319 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 5498 transitions. Word has length 67 [2021-11-07 08:38:54,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:54,320 INFO L470 AbstractCegarLoop]: Abstraction has 3043 states and 5498 transitions. [2021-11-07 08:38:54,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 5498 transitions. [2021-11-07 08:38:54,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 08:38:54,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:54,326 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 08:38:54,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:38:54,327 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:38:54,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:54,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1959710938, now seen corresponding path program 1 times [2021-11-07 08:38:54,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:54,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696579290] [2021-11-07 08:38:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:54,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:54,409 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 08:38:54,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:54,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696579290] [2021-11-07 08:38:54,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696579290] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:54,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:54,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:38:54,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479303366] [2021-11-07 08:38:54,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:38:54,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:54,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:38:54,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:38:54,414 INFO L87 Difference]: Start difference. First operand 3043 states and 5498 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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 08:38:54,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:54,771 INFO L93 Difference]: Finished difference Result 8215 states and 14870 transitions. [2021-11-07 08:38:54,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:38:54,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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 08:38:54,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:54,813 INFO L225 Difference]: With dead ends: 8215 [2021-11-07 08:38:54,813 INFO L226 Difference]: Without dead ends: 5341 [2021-11-07 08:38:54,818 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 08:38:54,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5341 states. [2021-11-07 08:38:55,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5341 to 5197. [2021-11-07 08:38:55,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5197 states, 5195 states have (on average 1.810009624639076) internal successors, (9403), 5196 states have internal predecessors, (9403), 0 states have call successors, (0), 0 states 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 08:38:55,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5197 states to 5197 states and 9403 transitions. [2021-11-07 08:38:55,242 INFO L78 Accepts]: Start accepts. Automaton has 5197 states and 9403 transitions. Word has length 68 [2021-11-07 08:38:55,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:55,242 INFO L470 AbstractCegarLoop]: Abstraction has 5197 states and 9403 transitions. [2021-11-07 08:38:55,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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 08:38:55,243 INFO L276 IsEmpty]: Start isEmpty. Operand 5197 states and 9403 transitions. [2021-11-07 08:38:55,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 08:38:55,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:55,251 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:55,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 08:38:55,252 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:38:55,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:55,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1840332486, now seen corresponding path program 1 times [2021-11-07 08:38:55,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:55,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221148968] [2021-11-07 08:38:55,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:55,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:55,323 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 08:38:55,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:55,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221148968] [2021-11-07 08:38:55,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221148968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:55,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:55,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:38:55,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248047995] [2021-11-07 08:38:55,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:38:55,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:55,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:38:55,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:38:55,331 INFO L87 Difference]: Start difference. First operand 5197 states and 9403 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:56,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:56,015 INFO L93 Difference]: Finished difference Result 15135 states and 27427 transitions. [2021-11-07 08:38:56,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:38:56,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 08:38:56,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:56,087 INFO L225 Difference]: With dead ends: 15135 [2021-11-07 08:38:56,088 INFO L226 Difference]: Without dead ends: 10111 [2021-11-07 08:38:56,099 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 08:38:56,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10111 states. [2021-11-07 08:38:56,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10111 to 9967. [2021-11-07 08:38:56,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9967 states, 9965 states have (on average 1.810737581535374) internal successors, (18044), 9966 states have internal predecessors, (18044), 0 states have call successors, (0), 0 states 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 08:38:57,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9967 states to 9967 states and 18044 transitions. [2021-11-07 08:38:57,016 INFO L78 Accepts]: Start accepts. Automaton has 9967 states and 18044 transitions. Word has length 69 [2021-11-07 08:38:57,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:57,017 INFO L470 AbstractCegarLoop]: Abstraction has 9967 states and 18044 transitions. [2021-11-07 08:38:57,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:57,018 INFO L276 IsEmpty]: Start isEmpty. Operand 9967 states and 18044 transitions. [2021-11-07 08:38:57,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 08:38:57,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:57,026 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:57,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 08:38:57,027 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:38:57,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:57,028 INFO L85 PathProgramCache]: Analyzing trace with hash 998555159, now seen corresponding path program 1 times [2021-11-07 08:38:57,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:57,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424848962] [2021-11-07 08:38:57,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:57,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:57,100 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 08:38:57,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:57,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424848962] [2021-11-07 08:38:57,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424848962] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:57,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:57,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:38:57,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624992510] [2021-11-07 08:38:57,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:38:57,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:57,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:38:57,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:38:57,104 INFO L87 Difference]: Start difference. First operand 9967 states and 18044 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:58,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:58,372 INFO L93 Difference]: Finished difference Result 29147 states and 52825 transitions. [2021-11-07 08:38:58,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:38:58,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 08:38:58,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:58,442 INFO L225 Difference]: With dead ends: 29147 [2021-11-07 08:38:58,443 INFO L226 Difference]: Without dead ends: 19361 [2021-11-07 08:38:58,460 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 08:38:58,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19361 states. [2021-11-07 08:39:00,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19361 to 19217. [2021-11-07 08:39:00,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19217 states, 19215 states have (on average 1.810096278948738) internal successors, (34781), 19216 states have internal predecessors, (34781), 0 states have call successors, (0), 0 states 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 08:39:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19217 states to 19217 states and 34781 transitions. [2021-11-07 08:39:00,298 INFO L78 Accepts]: Start accepts. Automaton has 19217 states and 34781 transitions. Word has length 70 [2021-11-07 08:39:00,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:00,298 INFO L470 AbstractCegarLoop]: Abstraction has 19217 states and 34781 transitions. [2021-11-07 08:39:00,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:00,299 INFO L276 IsEmpty]: Start isEmpty. Operand 19217 states and 34781 transitions. [2021-11-07 08:39:00,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 08:39:00,309 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:00,310 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 08:39:00,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 08:39:00,310 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:39:00,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:00,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1854509244, now seen corresponding path program 1 times [2021-11-07 08:39:00,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:00,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604313169] [2021-11-07 08:39:00,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:00,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:00,384 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 08:39:00,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:00,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604313169] [2021-11-07 08:39:00,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604313169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:39:00,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:39:00,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:39:00,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387659881] [2021-11-07 08:39:00,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:39:00,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:00,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:39:00,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:39:00,388 INFO L87 Difference]: Start difference. First operand 19217 states and 34781 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:02,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:02,398 INFO L93 Difference]: Finished difference Result 57083 states and 103350 transitions. [2021-11-07 08:39:02,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:39:02,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 08:39:02,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:02,529 INFO L225 Difference]: With dead ends: 57083 [2021-11-07 08:39:02,530 INFO L226 Difference]: Without dead ends: 38051 [2021-11-07 08:39:02,568 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 08:39:02,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38051 states. [2021-11-07 08:39:05,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38051 to 37907. [2021-11-07 08:39:05,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37907 states, 37905 states have (on average 1.8074132700171481) internal successors, (68510), 37906 states have internal predecessors, (68510), 0 states have call successors, (0), 0 states 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 08:39:05,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37907 states to 37907 states and 68510 transitions. [2021-11-07 08:39:05,160 INFO L78 Accepts]: Start accepts. Automaton has 37907 states and 68510 transitions. Word has length 71 [2021-11-07 08:39:05,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:05,160 INFO L470 AbstractCegarLoop]: Abstraction has 37907 states and 68510 transitions. [2021-11-07 08:39:05,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:05,160 INFO L276 IsEmpty]: Start isEmpty. Operand 37907 states and 68510 transitions. [2021-11-07 08:39:05,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 08:39:05,172 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:05,172 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:05,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 08:39:05,173 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:39:05,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:05,174 INFO L85 PathProgramCache]: Analyzing trace with hash -2033361680, now seen corresponding path program 1 times [2021-11-07 08:39:05,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:05,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613261715] [2021-11-07 08:39:05,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:05,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:39:05,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:05,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613261715] [2021-11-07 08:39:05,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613261715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:39:05,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:39:05,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:39:05,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167659554] [2021-11-07 08:39:05,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:39:05,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:05,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:39:05,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:39:05,272 INFO L87 Difference]: Start difference. First operand 37907 states and 68510 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:08,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:08,481 INFO L93 Difference]: Finished difference Result 111424 states and 201343 transitions. [2021-11-07 08:39:08,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:39:08,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 08:39:08,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:08,704 INFO L225 Difference]: With dead ends: 111424 [2021-11-07 08:39:08,704 INFO L226 Difference]: Without dead ends: 73770 [2021-11-07 08:39:08,760 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:39:08,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73770 states. [2021-11-07 08:39:11,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73770 to 37907. [2021-11-07 08:39:11,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37907 states, 37905 states have (on average 1.800606780108165) internal successors, (68252), 37906 states have internal predecessors, (68252), 0 states have call successors, (0), 0 states 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 08:39:11,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37907 states to 37907 states and 68252 transitions. [2021-11-07 08:39:11,600 INFO L78 Accepts]: Start accepts. Automaton has 37907 states and 68252 transitions. Word has length 72 [2021-11-07 08:39:11,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:11,600 INFO L470 AbstractCegarLoop]: Abstraction has 37907 states and 68252 transitions. [2021-11-07 08:39:11,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:11,601 INFO L276 IsEmpty]: Start isEmpty. Operand 37907 states and 68252 transitions. [2021-11-07 08:39:11,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 08:39:11,620 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:11,620 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:11,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 08:39:11,621 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:39:11,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:11,622 INFO L85 PathProgramCache]: Analyzing trace with hash 703274002, now seen corresponding path program 2 times [2021-11-07 08:39:11,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:11,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895506326] [2021-11-07 08:39:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:11,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:11,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:11,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:11,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895506326] [2021-11-07 08:39:11,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895506326] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:39:11,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:39:11,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:39:11,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698544329] [2021-11-07 08:39:11,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:39:11,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:11,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:39:11,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:39:11,691 INFO L87 Difference]: Start difference. First operand 37907 states and 68252 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:13,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:13,443 INFO L93 Difference]: Finished difference Result 75699 states and 136304 transitions. [2021-11-07 08:39:13,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:39:13,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 08:39:13,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:13,539 INFO L225 Difference]: With dead ends: 75699 [2021-11-07 08:39:13,539 INFO L226 Difference]: Without dead ends: 38051 [2021-11-07 08:39:13,582 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 08:39:13,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38051 states. [2021-11-07 08:39:15,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38051 to 37907. [2021-11-07 08:39:15,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37907 states, 37905 states have (on average 1.797229916897507) internal successors, (68124), 37906 states have internal predecessors, (68124), 0 states have call successors, (0), 0 states 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 08:39:15,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37907 states to 37907 states and 68124 transitions. [2021-11-07 08:39:15,500 INFO L78 Accepts]: Start accepts. Automaton has 37907 states and 68124 transitions. Word has length 72 [2021-11-07 08:39:15,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:15,501 INFO L470 AbstractCegarLoop]: Abstraction has 37907 states and 68124 transitions. [2021-11-07 08:39:15,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:15,501 INFO L276 IsEmpty]: Start isEmpty. Operand 37907 states and 68124 transitions. [2021-11-07 08:39:15,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 08:39:15,513 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:15,513 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] [2021-11-07 08:39:15,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 08:39:15,514 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:39:15,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:15,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1868125957, now seen corresponding path program 1 times [2021-11-07 08:39:15,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:15,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161154022] [2021-11-07 08:39:15,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:15,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:15,591 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 08:39:15,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:15,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161154022] [2021-11-07 08:39:15,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161154022] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:39:15,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:39:15,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:39:15,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146601394] [2021-11-07 08:39:15,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:39:15,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:15,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:39:15,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:39:15,594 INFO L87 Difference]: Start difference. First operand 37907 states and 68124 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:18,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:18,363 INFO L93 Difference]: Finished difference Result 105309 states and 188986 transitions. [2021-11-07 08:39:18,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:39:18,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 08:39:18,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:18,655 INFO L225 Difference]: With dead ends: 105309 [2021-11-07 08:39:18,657 INFO L226 Difference]: Without dead ends: 67621 [2021-11-07 08:39:18,686 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 08:39:18,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67621 states. [2021-11-07 08:39:21,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67621 to 67477. [2021-11-07 08:39:21,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67477 states, 67475 states have (on average 1.7892997406446831) internal successors, (120733), 67476 states have internal predecessors, (120733), 0 states have call successors, (0), 0 states 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 08:39:22,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67477 states to 67477 states and 120733 transitions. [2021-11-07 08:39:22,362 INFO L78 Accepts]: Start accepts. Automaton has 67477 states and 120733 transitions. Word has length 72 [2021-11-07 08:39:22,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:22,363 INFO L470 AbstractCegarLoop]: Abstraction has 67477 states and 120733 transitions. [2021-11-07 08:39:22,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:22,363 INFO L276 IsEmpty]: Start isEmpty. Operand 67477 states and 120733 transitions. [2021-11-07 08:39:22,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 08:39:22,397 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:22,397 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:22,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 08:39:22,398 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:39:22,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:22,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1193061364, now seen corresponding path program 1 times [2021-11-07 08:39:22,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:22,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298076246] [2021-11-07 08:39:22,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:22,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 08:39:22,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:22,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298076246] [2021-11-07 08:39:22,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298076246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:39:22,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:39:22,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:39:22,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362561306] [2021-11-07 08:39:22,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:39:22,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:22,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:39:22,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:39:22,517 INFO L87 Difference]: Start difference. First operand 67477 states and 120733 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:28,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:28,930 INFO L93 Difference]: Finished difference Result 135198 states and 241863 transitions. [2021-11-07 08:39:28,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:39:28,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 08:39:28,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:29,233 INFO L225 Difference]: With dead ends: 135198 [2021-11-07 08:39:29,233 INFO L226 Difference]: Without dead ends: 135072 [2021-11-07 08:39:29,264 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:39:29,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135072 states. [2021-11-07 08:39:35,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135072 to 134883. [2021-11-07 08:39:35,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134883 states, 134881 states have (on average 1.7893698890132783) internal successors, (241352), 134882 states have internal predecessors, (241352), 0 states have call successors, (0), 0 states 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 08:39:36,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134883 states to 134883 states and 241352 transitions. [2021-11-07 08:39:36,471 INFO L78 Accepts]: Start accepts. Automaton has 134883 states and 241352 transitions. Word has length 73 [2021-11-07 08:39:36,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:36,471 INFO L470 AbstractCegarLoop]: Abstraction has 134883 states and 241352 transitions. [2021-11-07 08:39:36,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:36,472 INFO L276 IsEmpty]: Start isEmpty. Operand 134883 states and 241352 transitions. [2021-11-07 08:39:36,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 08:39:36,487 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:36,487 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:36,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 08:39:36,488 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:39:36,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:36,488 INFO L85 PathProgramCache]: Analyzing trace with hash 487788281, now seen corresponding path program 1 times [2021-11-07 08:39:36,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:36,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985496459] [2021-11-07 08:39:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:36,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:36,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 08:39:36,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:36,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985496459] [2021-11-07 08:39:36,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985496459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:39:36,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:39:36,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:39:36,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716429728] [2021-11-07 08:39:36,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:39:36,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:36,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:39:36,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:39:36,576 INFO L87 Difference]: Start difference. First operand 134883 states and 241352 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)