./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec4_product35.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_f6313ffb-45d7-447d-852a-5fdcd7622099/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6313ffb-45d7-447d-852a-5fdcd7622099/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_f6313ffb-45d7-447d-852a-5fdcd7622099/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6313ffb-45d7-447d-852a-5fdcd7622099/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product35.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6313ffb-45d7-447d-852a-5fdcd7622099/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_f6313ffb-45d7-447d-852a-5fdcd7622099/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 0684811b66680ff9a661ea21879b3502eab6dd1ae141cb77fa167c05dd5b0ff9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:17:16,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:17:16,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:17:16,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:17:16,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:17:16,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:17:16,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:17:16,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:17:16,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:17:16,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:17:16,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:17:16,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:17:16,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:17:16,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:17:16,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:17:16,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:17:16,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:17:16,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:17:16,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:17:16,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:17:16,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:17:16,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:17:16,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:17:16,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:17:16,843 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:17:16,843 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:17:16,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:17:16,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:17:16,847 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:17:16,849 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:17:16,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:17:16,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:17:16,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:17:16,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:17:16,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:17:16,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:17:16,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:17:16,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:17:16,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:17:16,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:17:16,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:17:16,861 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6313ffb-45d7-447d-852a-5fdcd7622099/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:17:16,913 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:17:16,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:17:16,914 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:17:16,914 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:17:16,923 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:17:16,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:17:16,923 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:17:16,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:17:16,924 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:17:16,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:17:16,924 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:17:16,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:17:16,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:17:16,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:17:16,925 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:17:16,925 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:17:16,925 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:17:16,926 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:17:16,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:17:16,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:17:16,926 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:17:16,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:17:16,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:17:16,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:17:16,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:17:16,927 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:17:16,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:17:16,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:17:16,928 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:17:16,928 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:17:16,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:17:16,929 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:17:16,929 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_f6313ffb-45d7-447d-852a-5fdcd7622099/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6313ffb-45d7-447d-852a-5fdcd7622099/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0684811b66680ff9a661ea21879b3502eab6dd1ae141cb77fa167c05dd5b0ff9 [2021-11-07 08:17:17,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:17:17,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:17:17,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:17:17,217 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:17:17,218 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:17:17,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6313ffb-45d7-447d-852a-5fdcd7622099/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/product-lines/email_spec4_product35.cil.c [2021-11-07 08:17:17,317 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6313ffb-45d7-447d-852a-5fdcd7622099/bin/uautomizer-AkOaLMaTGY/data/23f012e6a/a723afed382446fc9a82e941c5e25628/FLAGef6a31e9c [2021-11-07 08:17:17,962 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:17:17,963 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6313ffb-45d7-447d-852a-5fdcd7622099/sv-benchmarks/c/product-lines/email_spec4_product35.cil.c [2021-11-07 08:17:17,997 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6313ffb-45d7-447d-852a-5fdcd7622099/bin/uautomizer-AkOaLMaTGY/data/23f012e6a/a723afed382446fc9a82e941c5e25628/FLAGef6a31e9c [2021-11-07 08:17:18,152 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6313ffb-45d7-447d-852a-5fdcd7622099/bin/uautomizer-AkOaLMaTGY/data/23f012e6a/a723afed382446fc9a82e941c5e25628 [2021-11-07 08:17:18,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:17:18,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:17:18,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:17:18,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:17:18,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:17:18,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:17:18" (1/1) ... [2021-11-07 08:17:18,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@406a4d14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:17:18, skipping insertion in model container [2021-11-07 08:17:18,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:17:18" (1/1) ... [2021-11-07 08:17:18,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:17:18,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:17:18,457 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_f6313ffb-45d7-447d-852a-5fdcd7622099/sv-benchmarks/c/product-lines/email_spec4_product35.cil.c[1542,1555] [2021-11-07 08:17:18,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:17:18,958 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:17:18,976 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_f6313ffb-45d7-447d-852a-5fdcd7622099/sv-benchmarks/c/product-lines/email_spec4_product35.cil.c[1542,1555] [2021-11-07 08:17:19,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:17:19,132 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:17:19,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:17:19 WrapperNode [2021-11-07 08:17:19,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:17:19,134 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:17:19,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:17:19,135 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:17:19,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:17:19" (1/1) ... [2021-11-07 08:17:19,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:17:19" (1/1) ... [2021-11-07 08:17:19,396 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:17:19,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:17:19,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:17:19,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:17:19,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:17:19" (1/1) ... [2021-11-07 08:17:19,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:17:19" (1/1) ... [2021-11-07 08:17:19,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:17:19" (1/1) ... [2021-11-07 08:17:19,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:17:19" (1/1) ... [2021-11-07 08:17:19,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:17:19" (1/1) ... [2021-11-07 08:17:19,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:17:19" (1/1) ... [2021-11-07 08:17:19,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:17:19" (1/1) ... [2021-11-07 08:17:19,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:17:19,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:17:19,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:17:19,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:17:19,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:17:19" (1/1) ... [2021-11-07 08:17:19,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:17:19,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6313ffb-45d7-447d-852a-5fdcd7622099/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:17:19,732 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6313ffb-45d7-447d-852a-5fdcd7622099/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:17:19,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6313ffb-45d7-447d-852a-5fdcd7622099/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:17:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 08:17:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:17:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:17:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:17:19,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:17:23,731 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:17:23,731 INFO L299 CfgBuilder]: Removed 925 assume(true) statements. [2021-11-07 08:17:23,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:17:23 BoogieIcfgContainer [2021-11-07 08:17:23,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:17:23,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:17:23,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:17:23,742 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:17:23,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:17:18" (1/3) ... [2021-11-07 08:17:23,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9defa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:17:23, skipping insertion in model container [2021-11-07 08:17:23,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:17:19" (2/3) ... [2021-11-07 08:17:23,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9defa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:17:23, skipping insertion in model container [2021-11-07 08:17:23,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:17:23" (3/3) ... [2021-11-07 08:17:23,746 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec4_product35.cil.c [2021-11-07 08:17:23,752 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:17:23,752 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 08:17:23,813 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:17:23,820 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 08:17:23,821 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 08:17:23,864 INFO L276 IsEmpty]: Start isEmpty. Operand has 1342 states, 1335 states have (on average 1.7235955056179775) internal successors, (2301), 1341 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states 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 08:17:23,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 08:17:23,878 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:23,879 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 08:17:23,880 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 08:17:23,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:23,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1869304248, now seen corresponding path program 1 times [2021-11-07 08:17:23,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:23,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524347059] [2021-11-07 08:17:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:23,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:24,342 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 08:17:24,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:24,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524347059] [2021-11-07 08:17:24,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524347059] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:24,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:24,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:17:24,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687416882] [2021-11-07 08:17:24,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:17:24,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:24,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:17:24,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:17:24,375 INFO L87 Difference]: Start difference. First operand has 1342 states, 1335 states have (on average 1.7235955056179775) internal successors, (2301), 1341 states have internal predecessors, (2301), 0 states have call successors, (0), 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 16.666666666666668) internal successors, (50), 3 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 08:17:24,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:24,672 INFO L93 Difference]: Finished difference Result 3991 states and 6845 transitions. [2021-11-07 08:17:24,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:17:24,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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 08:17:24,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:24,707 INFO L225 Difference]: With dead ends: 3991 [2021-11-07 08:17:24,707 INFO L226 Difference]: Without dead ends: 2188 [2021-11-07 08:17:24,718 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 08:17:24,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-11-07 08:17:24,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1103. [2021-11-07 08:17:24,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1097 states have (on average 1.7247037374658158) internal successors, (1892), 1102 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:17:24,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1892 transitions. [2021-11-07 08:17:24,869 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1892 transitions. Word has length 50 [2021-11-07 08:17:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:24,871 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 1892 transitions. [2021-11-07 08:17:24,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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 08:17:24,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1892 transitions. [2021-11-07 08:17:24,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:17:24,881 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:24,881 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:24,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:17:24,882 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 08:17:24,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:24,888 INFO L85 PathProgramCache]: Analyzing trace with hash -2018426343, now seen corresponding path program 1 times [2021-11-07 08:17:24,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:24,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252677282] [2021-11-07 08:17:24,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:24,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:25,090 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 08:17:25,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:25,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252677282] [2021-11-07 08:17:25,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252677282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:25,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:25,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:17:25,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672954484] [2021-11-07 08:17:25,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:17:25,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:25,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:17:25,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:25,098 INFO L87 Difference]: Start difference. First operand 1103 states and 1892 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 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 08:17:25,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:25,384 INFO L93 Difference]: Finished difference Result 3258 states and 5592 transitions. [2021-11-07 08:17:25,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:17:25,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 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 08:17:25,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:25,405 INFO L225 Difference]: With dead ends: 3258 [2021-11-07 08:17:25,405 INFO L226 Difference]: Without dead ends: 2174 [2021-11-07 08:17:25,409 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 08:17:25,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-11-07 08:17:25,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 1103. [2021-11-07 08:17:25,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1097 states have (on average 1.723792160437557) internal successors, (1891), 1102 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states 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 08:17:25,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1891 transitions. [2021-11-07 08:17:25,516 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1891 transitions. Word has length 52 [2021-11-07 08:17:25,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:25,517 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 1891 transitions. [2021-11-07 08:17:25,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 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 08:17:25,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1891 transitions. [2021-11-07 08:17:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 08:17:25,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:25,520 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:25,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:17:25,521 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 08:17:25,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:25,522 INFO L85 PathProgramCache]: Analyzing trace with hash 985399526, now seen corresponding path program 1 times [2021-11-07 08:17:25,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:25,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477644695] [2021-11-07 08:17:25,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:25,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:25,623 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 08:17:25,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:25,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477644695] [2021-11-07 08:17:25,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477644695] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:25,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:25,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:17:25,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868417420] [2021-11-07 08:17:25,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:17:25,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:25,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:17:25,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:17:25,627 INFO L87 Difference]: Start difference. First operand 1103 states and 1891 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:25,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:25,721 INFO L93 Difference]: Finished difference Result 2188 states and 3756 transitions. [2021-11-07 08:17:25,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:17:25,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 08:17:25,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:25,730 INFO L225 Difference]: With dead ends: 2188 [2021-11-07 08:17:25,730 INFO L226 Difference]: Without dead ends: 1108 [2021-11-07 08:17:25,733 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 08:17:25,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-11-07 08:17:25,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1103. [2021-11-07 08:17:25,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1097 states have (on average 1.7210574293527803) internal successors, (1888), 1102 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states 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 08:17:25,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1888 transitions. [2021-11-07 08:17:25,792 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1888 transitions. Word has length 53 [2021-11-07 08:17:25,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:25,792 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 1888 transitions. [2021-11-07 08:17:25,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:25,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1888 transitions. [2021-11-07 08:17:25,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 08:17:25,795 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:25,795 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:25,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:17:25,796 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 08:17:25,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:25,797 INFO L85 PathProgramCache]: Analyzing trace with hash 5851329, now seen corresponding path program 1 times [2021-11-07 08:17:25,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:25,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158333058] [2021-11-07 08:17:25,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:25,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:25,889 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 08:17:25,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:25,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158333058] [2021-11-07 08:17:25,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158333058] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:25,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:25,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:17:25,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221071452] [2021-11-07 08:17:25,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:17:25,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:25,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:17:25,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:25,893 INFO L87 Difference]: Start difference. First operand 1103 states and 1888 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:26,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:26,135 INFO L93 Difference]: Finished difference Result 3248 states and 5572 transitions. [2021-11-07 08:17:26,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:17:26,136 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 08:17:26,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:26,150 INFO L225 Difference]: With dead ends: 3248 [2021-11-07 08:17:26,150 INFO L226 Difference]: Without dead ends: 2172 [2021-11-07 08:17:26,153 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 08:17:26,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-11-07 08:17:26,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 1103. [2021-11-07 08:17:26,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1097 states have (on average 1.7201458523245214) internal successors, (1887), 1102 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states 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 08:17:26,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1887 transitions. [2021-11-07 08:17:26,248 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1887 transitions. Word has length 55 [2021-11-07 08:17:26,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:26,248 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 1887 transitions. [2021-11-07 08:17:26,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:26,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1887 transitions. [2021-11-07 08:17:26,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 08:17:26,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:26,250 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:26,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:17:26,251 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 08:17:26,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:26,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1815233052, now seen corresponding path program 1 times [2021-11-07 08:17:26,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:26,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360013064] [2021-11-07 08:17:26,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:26,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:26,331 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 08:17:26,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:26,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360013064] [2021-11-07 08:17:26,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360013064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:26,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:26,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:17:26,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411795124] [2021-11-07 08:17:26,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:17:26,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:26,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:17:26,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:26,334 INFO L87 Difference]: Start difference. First operand 1103 states and 1887 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:26,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:26,604 INFO L93 Difference]: Finished difference Result 3253 states and 5576 transitions. [2021-11-07 08:17:26,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:17:26,604 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 08:17:26,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:26,619 INFO L225 Difference]: With dead ends: 3253 [2021-11-07 08:17:26,619 INFO L226 Difference]: Without dead ends: 2177 [2021-11-07 08:17:26,622 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 08:17:26,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2021-11-07 08:17:26,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 1103. [2021-11-07 08:17:26,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1097 states have (on average 1.7192342752962626) internal successors, (1886), 1102 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states 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 08:17:26,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1886 transitions. [2021-11-07 08:17:26,696 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1886 transitions. Word has length 56 [2021-11-07 08:17:26,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:26,696 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 1886 transitions. [2021-11-07 08:17:26,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:26,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1886 transitions. [2021-11-07 08:17:26,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 08:17:26,699 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:26,699 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] [2021-11-07 08:17:26,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:17:26,700 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 08:17:26,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:26,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1272707332, now seen corresponding path program 1 times [2021-11-07 08:17:26,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:26,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755183474] [2021-11-07 08:17:26,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:26,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:26,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:26,829 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 08:17:26,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:26,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755183474] [2021-11-07 08:17:26,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755183474] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:26,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:26,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:17:26,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098427164] [2021-11-07 08:17:26,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:17:26,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:26,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:17:26,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:17:26,833 INFO L87 Difference]: Start difference. First operand 1103 states and 1886 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 08:17:26,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:26,909 INFO L93 Difference]: Finished difference Result 1921 states and 3259 transitions. [2021-11-07 08:17:26,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:17:26,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-11-07 08:17:26,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:26,924 INFO L225 Difference]: With dead ends: 1921 [2021-11-07 08:17:26,924 INFO L226 Difference]: Without dead ends: 1106 [2021-11-07 08:17:26,926 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 08:17:26,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-11-07 08:17:26,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1105. [2021-11-07 08:17:26,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1099 states have (on average 1.7179253867151956) internal successors, (1888), 1104 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states 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 08:17:26,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1888 transitions. [2021-11-07 08:17:26,993 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1888 transitions. Word has length 57 [2021-11-07 08:17:26,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:26,994 INFO L470 AbstractCegarLoop]: Abstraction has 1105 states and 1888 transitions. [2021-11-07 08:17:26,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 08:17:26,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1888 transitions. [2021-11-07 08:17:26,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 08:17:26,996 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:26,996 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, 1, 1, 1] [2021-11-07 08:17:26,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:17:26,997 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 08:17:26,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:26,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1727605142, now seen corresponding path program 1 times [2021-11-07 08:17:26,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:27,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709320677] [2021-11-07 08:17:27,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:27,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:27,117 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 08:17:27,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:27,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709320677] [2021-11-07 08:17:27,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709320677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:27,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:27,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:17:27,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088283807] [2021-11-07 08:17:27,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:17:27,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:27,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:17:27,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:17:27,121 INFO L87 Difference]: Start difference. First operand 1105 states and 1888 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 08:17:27,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:27,267 INFO L93 Difference]: Finished difference Result 3201 states and 5488 transitions. [2021-11-07 08:17:27,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:17:27,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-07 08:17:27,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:27,281 INFO L225 Difference]: With dead ends: 3201 [2021-11-07 08:17:27,281 INFO L226 Difference]: Without dead ends: 2127 [2021-11-07 08:17:27,284 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 08:17:27,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-11-07 08:17:27,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1312. [2021-11-07 08:17:27,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1306 states have (on average 1.7381316998468606) internal successors, (2270), 1311 states have internal predecessors, (2270), 0 states have call successors, (0), 0 states 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 08:17:27,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 2270 transitions. [2021-11-07 08:17:27,374 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 2270 transitions. Word has length 65 [2021-11-07 08:17:27,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:27,375 INFO L470 AbstractCegarLoop]: Abstraction has 1312 states and 2270 transitions. [2021-11-07 08:17:27,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 08:17:27,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 2270 transitions. [2021-11-07 08:17:27,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 08:17:27,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:27,378 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, 1, 1, 1, 1] [2021-11-07 08:17:27,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:17:27,378 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 08:17:27,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:27,379 INFO L85 PathProgramCache]: Analyzing trace with hash -2131528055, now seen corresponding path program 1 times [2021-11-07 08:17:27,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:27,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902538803] [2021-11-07 08:17:27,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:27,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:27,467 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 08:17:27,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:27,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902538803] [2021-11-07 08:17:27,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902538803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:27,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:27,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:17:27,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596563263] [2021-11-07 08:17:27,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:17:27,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:27,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:17:27,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:27,473 INFO L87 Difference]: Start difference. First operand 1312 states and 2270 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 08:17:28,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:28,348 INFO L93 Difference]: Finished difference Result 3866 states and 6716 transitions. [2021-11-07 08:17:28,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:17:28,349 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 66 [2021-11-07 08:17:28,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:28,366 INFO L225 Difference]: With dead ends: 3866 [2021-11-07 08:17:28,366 INFO L226 Difference]: Without dead ends: 2585 [2021-11-07 08:17:28,369 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 08:17:28,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2021-11-07 08:17:28,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 1312. [2021-11-07 08:17:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1306 states have (on average 1.7366003062787136) internal successors, (2268), 1311 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states 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 08:17:28,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 2268 transitions. [2021-11-07 08:17:28,472 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 2268 transitions. Word has length 66 [2021-11-07 08:17:28,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:28,473 INFO L470 AbstractCegarLoop]: Abstraction has 1312 states and 2268 transitions. [2021-11-07 08:17:28,473 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 08:17:28,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 2268 transitions. [2021-11-07 08:17:28,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 08:17:28,475 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:28,476 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, 1, 1, 1, 1, 1] [2021-11-07 08:17:28,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:17:28,476 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 08:17:28,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:28,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1936353632, now seen corresponding path program 1 times [2021-11-07 08:17:28,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:28,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106589589] [2021-11-07 08:17:28,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:28,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:28,562 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 08:17:28,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:28,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106589589] [2021-11-07 08:17:28,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106589589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:28,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:28,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:17:28,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212240821] [2021-11-07 08:17:28,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:17:28,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:28,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:17:28,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:17:28,569 INFO L87 Difference]: Start difference. First operand 1312 states and 2268 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 08:17:28,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:28,748 INFO L93 Difference]: Finished difference Result 3864 states and 6708 transitions. [2021-11-07 08:17:28,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:17:28,749 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 08:17:28,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:28,770 INFO L225 Difference]: With dead ends: 3864 [2021-11-07 08:17:28,771 INFO L226 Difference]: Without dead ends: 2583 [2021-11-07 08:17:28,774 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 08:17:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2021-11-07 08:17:28,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 1768. [2021-11-07 08:17:28,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1762 states have (on average 1.764472190692395) internal successors, (3109), 1767 states have internal predecessors, (3109), 0 states have call successors, (0), 0 states 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 08:17:28,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 3109 transitions. [2021-11-07 08:17:28,918 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 3109 transitions. Word has length 67 [2021-11-07 08:17:28,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:28,919 INFO L470 AbstractCegarLoop]: Abstraction has 1768 states and 3109 transitions. [2021-11-07 08:17:28,919 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 08:17:28,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 3109 transitions. [2021-11-07 08:17:28,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 08:17:28,927 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:28,927 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, 1, 1, 1, 1, 1] [2021-11-07 08:17:28,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:17:28,928 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 08:17:28,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:28,929 INFO L85 PathProgramCache]: Analyzing trace with hash 2067528894, now seen corresponding path program 1 times [2021-11-07 08:17:28,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:28,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886889706] [2021-11-07 08:17:28,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:28,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:29,023 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 08:17:29,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:29,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886889706] [2021-11-07 08:17:29,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886889706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:17:29,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854834596] [2021-11-07 08:17:29,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:29,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:17:29,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6313ffb-45d7-447d-852a-5fdcd7622099/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:17:29,026 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6313ffb-45d7-447d-852a-5fdcd7622099/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:17:29,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6313ffb-45d7-447d-852a-5fdcd7622099/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:17:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:29,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:17:29,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:17:29,662 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 08:17:29,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854834596] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:17:29,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:17:29,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-07 08:17:29,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480056272] [2021-11-07 08:17:29,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:17:29,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:29,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:17:29,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:29,665 INFO L87 Difference]: Start difference. First operand 1768 states and 3109 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:29,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:29,934 INFO L93 Difference]: Finished difference Result 3664 states and 6332 transitions. [2021-11-07 08:17:29,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:29,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 08:17:29,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:29,955 INFO L225 Difference]: With dead ends: 3664 [2021-11-07 08:17:29,955 INFO L226 Difference]: Without dead ends: 2849 [2021-11-07 08:17:29,958 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 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 08:17:29,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2021-11-07 08:17:30,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2031. [2021-11-07 08:17:30,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2025 states have (on average 1.7718518518518518) internal successors, (3588), 2030 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states 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 08:17:30,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 3588 transitions. [2021-11-07 08:17:30,122 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 3588 transitions. Word has length 67 [2021-11-07 08:17:30,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:30,122 INFO L470 AbstractCegarLoop]: Abstraction has 2031 states and 3588 transitions. [2021-11-07 08:17:30,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:30,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 3588 transitions. [2021-11-07 08:17:30,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 08:17:30,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:30,127 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 08:17:30,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6313ffb-45d7-447d-852a-5fdcd7622099/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:17:30,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6313ffb-45d7-447d-852a-5fdcd7622099/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 08:17:30,343 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 08:17:30,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:30,344 INFO L85 PathProgramCache]: Analyzing trace with hash -62611813, now seen corresponding path program 1 times [2021-11-07 08:17:30,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:30,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055171034] [2021-11-07 08:17:30,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:30,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:30,420 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 08:17:30,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:30,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055171034] [2021-11-07 08:17:30,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055171034] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:30,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:30,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:17:30,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949833488] [2021-11-07 08:17:30,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:17:30,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:30,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:17:30,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:17:30,423 INFO L87 Difference]: Start difference. First operand 2031 states and 3588 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 08:17:30,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:30,650 INFO L93 Difference]: Finished difference Result 5680 states and 10049 transitions. [2021-11-07 08:17:30,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:17:30,651 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 08:17:30,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:30,687 INFO L225 Difference]: With dead ends: 5680 [2021-11-07 08:17:30,696 INFO L226 Difference]: Without dead ends: 3750 [2021-11-07 08:17:30,702 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 08:17:30,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3750 states. [2021-11-07 08:17:30,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3750 to 2935. [2021-11-07 08:17:30,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2929 states have (on average 1.7920792079207921) internal successors, (5249), 2934 states have internal predecessors, (5249), 0 states have call successors, (0), 0 states 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 08:17:30,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 5249 transitions. [2021-11-07 08:17:30,943 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 5249 transitions. Word has length 71 [2021-11-07 08:17:30,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:30,943 INFO L470 AbstractCegarLoop]: Abstraction has 2935 states and 5249 transitions. [2021-11-07 08:17:30,943 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 08:17:30,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 5249 transitions. [2021-11-07 08:17:30,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 08:17:30,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:30,951 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:30,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 08:17:30,952 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 08:17:30,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:30,953 INFO L85 PathProgramCache]: Analyzing trace with hash 779017243, now seen corresponding path program 1 times [2021-11-07 08:17:30,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:30,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953518399] [2021-11-07 08:17:30,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:30,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:31,031 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 08:17:31,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:31,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953518399] [2021-11-07 08:17:31,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953518399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:31,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:31,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:17:31,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584040924] [2021-11-07 08:17:31,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:17:31,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:31,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:17:31,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:17:31,035 INFO L87 Difference]: Start difference. First operand 2935 states and 5249 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 08:17:31,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:31,364 INFO L93 Difference]: Finished difference Result 8128 states and 14551 transitions. [2021-11-07 08:17:31,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:17:31,365 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 08:17:31,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:31,381 INFO L225 Difference]: With dead ends: 8128 [2021-11-07 08:17:31,382 INFO L226 Difference]: Without dead ends: 5328 [2021-11-07 08:17:31,388 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 08:17:31,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2021-11-07 08:17:31,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 4513. [2021-11-07 08:17:31,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4513 states, 4507 states have (on average 1.8074106944752608) internal successors, (8146), 4512 states have internal predecessors, (8146), 0 states have call successors, (0), 0 states 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 08:17:31,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4513 states to 4513 states and 8146 transitions. [2021-11-07 08:17:31,745 INFO L78 Accepts]: Start accepts. Automaton has 4513 states and 8146 transitions. Word has length 72 [2021-11-07 08:17:31,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:31,746 INFO L470 AbstractCegarLoop]: Abstraction has 4513 states and 8146 transitions. [2021-11-07 08:17:31,747 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 08:17:31,747 INFO L276 IsEmpty]: Start isEmpty. Operand 4513 states and 8146 transitions. [2021-11-07 08:17:31,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 08:17:31,754 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:31,755 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:31,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 08:17:31,755 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 08:17:31,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:31,756 INFO L85 PathProgramCache]: Analyzing trace with hash 490702860, now seen corresponding path program 1 times [2021-11-07 08:17:31,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:31,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269363817] [2021-11-07 08:17:31,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:31,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:31,841 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 08:17:31,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:31,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269363817] [2021-11-07 08:17:31,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269363817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:31,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:31,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:17:31,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790267306] [2021-11-07 08:17:31,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:17:31,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:31,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:17:31,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:17:31,844 INFO L87 Difference]: Start difference. First operand 4513 states and 8146 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:32,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:32,319 INFO L93 Difference]: Finished difference Result 12578 states and 22725 transitions. [2021-11-07 08:17:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:17:32,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 08:17:32,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:32,345 INFO L225 Difference]: With dead ends: 12578 [2021-11-07 08:17:32,345 INFO L226 Difference]: Without dead ends: 8234 [2021-11-07 08:17:32,352 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 08:17:32,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8234 states. [2021-11-07 08:17:32,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8234 to 7419. [2021-11-07 08:17:32,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7419 states, 7413 states have (on average 1.817752596789424) internal successors, (13475), 7418 states have internal predecessors, (13475), 0 states have call successors, (0), 0 states 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 08:17:32,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7419 states to 7419 states and 13475 transitions. [2021-11-07 08:17:32,801 INFO L78 Accepts]: Start accepts. Automaton has 7419 states and 13475 transitions. Word has length 73 [2021-11-07 08:17:32,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:32,802 INFO L470 AbstractCegarLoop]: Abstraction has 7419 states and 13475 transitions. [2021-11-07 08:17:32,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:32,802 INFO L276 IsEmpty]: Start isEmpty. Operand 7419 states and 13475 transitions. [2021-11-07 08:17:32,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 08:17:32,810 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:32,811 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:32,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:17:32,811 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 08:17:32,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:32,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1954036844, now seen corresponding path program 1 times [2021-11-07 08:17:32,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:32,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091213617] [2021-11-07 08:17:32,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:32,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:32,943 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 08:17:32,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:32,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091213617] [2021-11-07 08:17:32,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091213617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:32,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:32,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:17:32,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117114469] [2021-11-07 08:17:32,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:17:32,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:32,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:17:32,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:17:32,947 INFO L87 Difference]: Start difference. First operand 7419 states and 13475 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 08:17:33,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:33,754 INFO L93 Difference]: Finished difference Result 21622 states and 39323 transitions. [2021-11-07 08:17:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:17:33,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-07 08:17:33,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:33,803 INFO L225 Difference]: With dead ends: 21622 [2021-11-07 08:17:33,803 INFO L226 Difference]: Without dead ends: 14380 [2021-11-07 08:17:33,819 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 08:17:33,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14380 states. [2021-11-07 08:17:34,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14380 to 13565. [2021-11-07 08:17:34,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13565 states, 13559 states have (on average 1.8246183346854488) internal successors, (24740), 13564 states have internal predecessors, (24740), 0 states have call successors, (0), 0 states 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 08:17:34,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13565 states to 13565 states and 24740 transitions. [2021-11-07 08:17:34,754 INFO L78 Accepts]: Start accepts. Automaton has 13565 states and 24740 transitions. Word has length 74 [2021-11-07 08:17:34,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:34,754 INFO L470 AbstractCegarLoop]: Abstraction has 13565 states and 24740 transitions. [2021-11-07 08:17:34,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 08:17:34,755 INFO L276 IsEmpty]: Start isEmpty. Operand 13565 states and 24740 transitions. [2021-11-07 08:17:34,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 08:17:34,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:34,767 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:34,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 08:17:34,768 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 08:17:34,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:34,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1808488517, now seen corresponding path program 1 times [2021-11-07 08:17:34,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:34,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777134887] [2021-11-07 08:17:34,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:34,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:34,839 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 08:17:34,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:34,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777134887] [2021-11-07 08:17:34,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777134887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:34,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:34,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:17:34,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915091740] [2021-11-07 08:17:34,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:17:34,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:34,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:17:34,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:17:34,843 INFO L87 Difference]: Start difference. First operand 13565 states and 24740 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:36,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:36,120 INFO L93 Difference]: Finished difference Result 39890 states and 72817 transitions. [2021-11-07 08:17:36,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:17:36,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 08:17:36,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:36,212 INFO L225 Difference]: With dead ends: 39890 [2021-11-07 08:17:36,212 INFO L226 Difference]: Without dead ends: 26510 [2021-11-07 08:17:36,237 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 08:17:36,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26510 states. [2021-11-07 08:17:37,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26510 to 25695. [2021-11-07 08:17:37,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25695 states, 25689 states have (on average 1.8275915761610029) internal successors, (46949), 25694 states have internal predecessors, (46949), 0 states have call successors, (0), 0 states 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 08:17:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25695 states to 25695 states and 46949 transitions. [2021-11-07 08:17:37,800 INFO L78 Accepts]: Start accepts. Automaton has 25695 states and 46949 transitions. Word has length 75 [2021-11-07 08:17:37,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:37,800 INFO L470 AbstractCegarLoop]: Abstraction has 25695 states and 46949 transitions. [2021-11-07 08:17:37,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:37,801 INFO L276 IsEmpty]: Start isEmpty. Operand 25695 states and 46949 transitions. [2021-11-07 08:17:37,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 08:17:37,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:37,815 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:37,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 08:17:37,816 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 08:17:37,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:37,817 INFO L85 PathProgramCache]: Analyzing trace with hash -594195845, now seen corresponding path program 1 times [2021-11-07 08:17:37,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:37,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557105149] [2021-11-07 08:17:37,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:37,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:37,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:37,896 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 08:17:37,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:37,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557105149] [2021-11-07 08:17:37,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557105149] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:37,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:37,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:17:37,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93302358] [2021-11-07 08:17:37,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:17:37,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:37,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:17:37,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:17:37,900 INFO L87 Difference]: Start difference. First operand 25695 states and 46949 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:39,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:39,488 INFO L93 Difference]: Finished difference Result 70919 states and 129180 transitions. [2021-11-07 08:17:39,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:17:39,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 08:17:39,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:39,610 INFO L225 Difference]: With dead ends: 70919 [2021-11-07 08:17:39,610 INFO L226 Difference]: Without dead ends: 45456 [2021-11-07 08:17:39,650 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 08:17:39,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45456 states. [2021-11-07 08:17:41,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45456 to 44641. [2021-11-07 08:17:41,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44641 states, 44635 states have (on average 1.81754228744259) internal successors, (81126), 44640 states have internal predecessors, (81126), 0 states have call successors, (0), 0 states 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 08:17:41,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44641 states to 44641 states and 81126 transitions. [2021-11-07 08:17:41,612 INFO L78 Accepts]: Start accepts. Automaton has 44641 states and 81126 transitions. Word has length 76 [2021-11-07 08:17:41,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:41,613 INFO L470 AbstractCegarLoop]: Abstraction has 44641 states and 81126 transitions. [2021-11-07 08:17:41,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:41,613 INFO L276 IsEmpty]: Start isEmpty. Operand 44641 states and 81126 transitions. [2021-11-07 08:17:41,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 08:17:41,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:41,631 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, 1, 1, 1] [2021-11-07 08:17:41,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 08:17:41,631 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 08:17:41,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:41,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1464779234, now seen corresponding path program 1 times [2021-11-07 08:17:41,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:41,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114301207] [2021-11-07 08:17:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:41,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:41,725 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 08:17:41,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:41,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114301207] [2021-11-07 08:17:41,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114301207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:41,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:41,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:17:41,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838864707] [2021-11-07 08:17:41,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:17:41,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:41,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:17:41,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:41,730 INFO L87 Difference]: Start difference. First operand 44641 states and 81126 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 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 08:17:46,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:46,116 INFO L93 Difference]: Finished difference Result 131532 states and 239013 transitions. [2021-11-07 08:17:46,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:17:46,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 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 77 [2021-11-07 08:17:46,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:46,336 INFO L225 Difference]: With dead ends: 131532 [2021-11-07 08:17:46,337 INFO L226 Difference]: Without dead ends: 87191 [2021-11-07 08:17:46,411 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 08:17:46,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87191 states. [2021-11-07 08:17:48,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87191 to 44641. [2021-11-07 08:17:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44641 states, 44635 states have (on average 1.811762070124342) internal successors, (80868), 44640 states have internal predecessors, (80868), 0 states have call successors, (0), 0 states 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 08:17:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44641 states to 44641 states and 80868 transitions. [2021-11-07 08:17:48,970 INFO L78 Accepts]: Start accepts. Automaton has 44641 states and 80868 transitions. Word has length 77 [2021-11-07 08:17:48,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:48,971 INFO L470 AbstractCegarLoop]: Abstraction has 44641 states and 80868 transitions. [2021-11-07 08:17:48,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 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 08:17:48,972 INFO L276 IsEmpty]: Start isEmpty. Operand 44641 states and 80868 transitions. [2021-11-07 08:17:49,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 08:17:49,000 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:49,001 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, 1, 1, 1, 1, 1] [2021-11-07 08:17:49,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 08:17:49,001 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 08:17:49,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:49,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1173694464, now seen corresponding path program 2 times [2021-11-07 08:17:49,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:49,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111399595] [2021-11-07 08:17:49,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:49,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:49,080 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 08:17:49,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:49,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111399595] [2021-11-07 08:17:49,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111399595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:49,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:49,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:17:49,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652786065] [2021-11-07 08:17:49,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:17:49,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:49,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:17:49,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:17:49,084 INFO L87 Difference]: Start difference. First operand 44641 states and 80868 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:50,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:50,996 INFO L93 Difference]: Finished difference Result 89791 states and 162582 transitions. [2021-11-07 08:17:51,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:17:51,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 08:17:51,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:51,073 INFO L225 Difference]: With dead ends: 89791 [2021-11-07 08:17:51,074 INFO L226 Difference]: Without dead ends: 45456 [2021-11-07 08:17:51,113 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 08:17:51,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45456 states. [2021-11-07 08:17:53,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45456 to 44641. [2021-11-07 08:17:53,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44641 states, 44635 states have (on average 1.8088943654083118) internal successors, (80740), 44640 states have internal predecessors, (80740), 0 states have call successors, (0), 0 states 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 08:17:53,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44641 states to 44641 states and 80740 transitions. [2021-11-07 08:17:53,451 INFO L78 Accepts]: Start accepts. Automaton has 44641 states and 80740 transitions. Word has length 77 [2021-11-07 08:17:53,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:53,452 INFO L470 AbstractCegarLoop]: Abstraction has 44641 states and 80740 transitions. [2021-11-07 08:17:53,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:53,452 INFO L276 IsEmpty]: Start isEmpty. Operand 44641 states and 80740 transitions. [2021-11-07 08:17:53,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 08:17:53,466 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:53,466 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:53,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 08:17:53,467 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 08:17:53,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:53,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1076597459, now seen corresponding path program 1 times [2021-11-07 08:17:53,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:53,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641149734] [2021-11-07 08:17:53,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:53,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:53,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:17:53,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:53,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641149734] [2021-11-07 08:17:53,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641149734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:53,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:53,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:17:53,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935759635] [2021-11-07 08:17:53,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:17:53,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:53,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:17:53,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:17:53,542 INFO L87 Difference]: Start difference. First operand 44641 states and 80740 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:56,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:56,560 INFO L93 Difference]: Finished difference Result 125417 states and 226656 transitions. [2021-11-07 08:17:56,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:17:56,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 08:17:56,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:56,889 INFO L225 Difference]: With dead ends: 125417 [2021-11-07 08:17:56,889 INFO L226 Difference]: Without dead ends: 81042 [2021-11-07 08:17:56,919 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 08:17:56,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81042 states. [2021-11-07 08:18:00,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81042 to 80227. [2021-11-07 08:18:00,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80227 states, 80221 states have (on average 1.8042781815235411) internal successors, (144741), 80226 states have internal predecessors, (144741), 0 states have call successors, (0), 0 states 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 08:18:00,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80227 states to 80227 states and 144741 transitions. [2021-11-07 08:18:00,777 INFO L78 Accepts]: Start accepts. Automaton has 80227 states and 144741 transitions. Word has length 77 [2021-11-07 08:18:00,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:18:00,777 INFO L470 AbstractCegarLoop]: Abstraction has 80227 states and 144741 transitions. [2021-11-07 08:18:00,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 80227 states and 144741 transitions. [2021-11-07 08:18:00,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 08:18:00,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:18:00,794 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, 1, 1, 1, 1] [2021-11-07 08:18:00,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 08:18:00,795 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 08:18:00,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:18:00,796 INFO L85 PathProgramCache]: Analyzing trace with hash -685581242, now seen corresponding path program 1 times [2021-11-07 08:18:00,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:18:00,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478072167] [2021-11-07 08:18:00,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:00,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:18:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:00,922 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 08:18:00,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:18:00,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478072167] [2021-11-07 08:18:00,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478072167] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:18:00,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:18:00,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:18:00,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735482570] [2021-11-07 08:18:00,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:18:00,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:18:00,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:18:00,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:18:00,926 INFO L87 Difference]: Start difference. First operand 80227 states and 144741 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 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 08:18:07,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:18:07,980 INFO L93 Difference]: Finished difference Result 163202 states and 294048 transitions. [2021-11-07 08:18:07,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:18:07,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 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 78 [2021-11-07 08:18:07,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:18:08,357 INFO L225 Difference]: With dead ends: 163202 [2021-11-07 08:18:08,357 INFO L226 Difference]: Without dead ends: 162405 [2021-11-07 08:18:08,398 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:18:08,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162405 states. [2021-11-07 08:18:15,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162405 to 160157. [2021-11-07 08:18:15,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160157 states, 160151 states have (on average 1.8044657854150146) internal successors, (288987), 160156 states have internal predecessors, (288987), 0 states have call successors, (0), 0 states 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 08:18:16,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160157 states to 160157 states and 288987 transitions. [2021-11-07 08:18:16,737 INFO L78 Accepts]: Start accepts. Automaton has 160157 states and 288987 transitions. Word has length 78 [2021-11-07 08:18:16,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:18:16,737 INFO L470 AbstractCegarLoop]: Abstraction has 160157 states and 288987 transitions. [2021-11-07 08:18:16,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 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 08:18:16,737 INFO L276 IsEmpty]: Start isEmpty. Operand 160157 states and 288987 transitions. [2021-11-07 08:18:16,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 08:18:16,764 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:18:16,764 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, 1, 1, 1, 1, 1] [2021-11-07 08:18:16,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 08:18:16,765 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 08:18:16,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:18:16,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1050595085, now seen corresponding path program 1 times [2021-11-07 08:18:16,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:18:16,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27924509] [2021-11-07 08:18:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:16,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:18:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:16,865 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 08:18:16,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:18:16,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27924509] [2021-11-07 08:18:16,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27924509] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:18:16,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:18:16,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:18:16,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972448452] [2021-11-07 08:18:16,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:18:16,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:18:16,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:18:16,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:18:16,868 INFO L87 Difference]: Start difference. First operand 160157 states and 288987 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)