./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.04.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dca3bde-59fd-43dc-9e33-f22d5ad3525e/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dca3bde-59fd-43dc-9e33-f22d5ad3525e/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dca3bde-59fd-43dc-9e33-f22d5ad3525e/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dca3bde-59fd-43dc-9e33-f22d5ad3525e/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.04.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dca3bde-59fd-43dc-9e33-f22d5ad3525e/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dca3bde-59fd-43dc-9e33-f22d5ad3525e/bin/uautomizer-wIGwrQj20G --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 d4710f8f3a918a0191222414f5c33a367ff98c09c2e8598fa3213223c4c35dba --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:48:42,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:48:42,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:48:42,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:48:42,670 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:48:42,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:48:42,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:48:42,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:48:42,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:48:42,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:48:42,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:48:42,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:48:42,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:48:42,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:48:42,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:48:42,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:48:42,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:48:42,695 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:48:42,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:48:42,701 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:48:42,704 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:48:42,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:48:42,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:48:42,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:48:42,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:48:42,715 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:48:42,716 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:48:42,717 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:48:42,718 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:48:42,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:48:42,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:48:42,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:48:42,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:48:42,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:48:42,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:48:42,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:48:42,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:48:42,728 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:48:42,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:48:42,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:48:42,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:48:42,733 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dca3bde-59fd-43dc-9e33-f22d5ad3525e/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:48:42,770 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:48:42,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:48:42,771 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:48:42,771 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:48:42,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:48:42,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:48:42,773 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:48:42,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:48:42,774 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:48:42,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:48:42,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:48:42,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:48:42,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:48:42,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:48:42,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:48:42,776 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:48:42,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:48:42,776 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:48:42,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:48:42,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:48:42,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:48:42,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:48:42,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:48:42,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:48:42,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:48:42,778 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:48:42,779 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:48:42,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:48:42,779 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:48:42,779 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:48:42,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:48:42,780 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:48:42,780 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_1dca3bde-59fd-43dc-9e33-f22d5ad3525e/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dca3bde-59fd-43dc-9e33-f22d5ad3525e/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4710f8f3a918a0191222414f5c33a367ff98c09c2e8598fa3213223c4c35dba [2021-11-23 13:48:43,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:48:43,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:48:43,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:48:43,201 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:48:43,202 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:48:43,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dca3bde-59fd-43dc-9e33-f22d5ad3525e/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/systemc/token_ring.04.cil-1.c [2021-11-23 13:48:43,298 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dca3bde-59fd-43dc-9e33-f22d5ad3525e/bin/uautomizer-wIGwrQj20G/data/7c5c9f525/8df8bd867db24003abd951bead31fde4/FLAG8d00a935b [2021-11-23 13:48:43,962 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:48:43,963 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dca3bde-59fd-43dc-9e33-f22d5ad3525e/sv-benchmarks/c/systemc/token_ring.04.cil-1.c [2021-11-23 13:48:43,982 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dca3bde-59fd-43dc-9e33-f22d5ad3525e/bin/uautomizer-wIGwrQj20G/data/7c5c9f525/8df8bd867db24003abd951bead31fde4/FLAG8d00a935b [2021-11-23 13:48:44,300 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dca3bde-59fd-43dc-9e33-f22d5ad3525e/bin/uautomizer-wIGwrQj20G/data/7c5c9f525/8df8bd867db24003abd951bead31fde4 [2021-11-23 13:48:44,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:48:44,308 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:48:44,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:48:44,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:48:44,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:48:44,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:48:44" (1/1) ... [2021-11-23 13:48:44,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f62fcb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:44, skipping insertion in model container [2021-11-23 13:48:44,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:48:44" (1/1) ... [2021-11-23 13:48:44,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:48:44,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:48:44,639 WARN L230 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_1dca3bde-59fd-43dc-9e33-f22d5ad3525e/sv-benchmarks/c/systemc/token_ring.04.cil-1.c[671,684] [2021-11-23 13:48:44,734 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:48:44,747 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:48:44,763 WARN L230 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_1dca3bde-59fd-43dc-9e33-f22d5ad3525e/sv-benchmarks/c/systemc/token_ring.04.cil-1.c[671,684] [2021-11-23 13:48:44,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:48:44,885 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:48:44,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:44 WrapperNode [2021-11-23 13:48:44,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:48:44,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:48:44,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:48:44,889 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:48:44,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:44" (1/1) ... [2021-11-23 13:48:44,928 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:44" (1/1) ... [2021-11-23 13:48:45,031 INFO L137 Inliner]: procedures = 36, calls = 43, calls flagged for inlining = 38, calls inlined = 77, statements flattened = 1112 [2021-11-23 13:48:45,031 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:48:45,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:48:45,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:48:45,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:48:45,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:44" (1/1) ... [2021-11-23 13:48:45,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:44" (1/1) ... [2021-11-23 13:48:45,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:44" (1/1) ... [2021-11-23 13:48:45,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:44" (1/1) ... [2021-11-23 13:48:45,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:44" (1/1) ... [2021-11-23 13:48:45,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:44" (1/1) ... [2021-11-23 13:48:45,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:44" (1/1) ... [2021-11-23 13:48:45,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:48:45,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:48:45,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:48:45,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:48:45,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:44" (1/1) ... [2021-11-23 13:48:45,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:48:45,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dca3bde-59fd-43dc-9e33-f22d5ad3525e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:48:45,211 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dca3bde-59fd-43dc-9e33-f22d5ad3525e/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:48:45,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dca3bde-59fd-43dc-9e33-f22d5ad3525e/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:48:45,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:48:45,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:48:45,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:48:45,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:48:45,443 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:48:45,467 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:48:46,589 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:48:46,609 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:48:46,610 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-23 13:48:46,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:48:46 BoogieIcfgContainer [2021-11-23 13:48:46,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:48:46,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:48:46,616 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:48:46,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:48:46,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:48:44" (1/3) ... [2021-11-23 13:48:46,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b24095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:48:46, skipping insertion in model container [2021-11-23 13:48:46,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:44" (2/3) ... [2021-11-23 13:48:46,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b24095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:48:46, skipping insertion in model container [2021-11-23 13:48:46,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:48:46" (3/3) ... [2021-11-23 13:48:46,625 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.04.cil-1.c [2021-11-23 13:48:46,632 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:48:46,632 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 13:48:46,724 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:48:46,732 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 [2021-11-23 13:48:46,732 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 13:48:46,765 INFO L276 IsEmpty]: Start isEmpty. Operand has 432 states, 430 states have (on average 1.5348837209302326) internal successors, (660), 431 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:46,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-23 13:48:46,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:46,779 INFO L514 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] [2021-11-23 13:48:46,780 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:46,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:46,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1721543821, now seen corresponding path program 1 times [2021-11-23 13:48:46,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:46,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485791366] [2021-11-23 13:48:46,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:46,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:47,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:47,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485791366] [2021-11-23 13:48:47,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485791366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:47,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:47,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:47,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842620987] [2021-11-23 13:48:47,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:47,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:48:47,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:47,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:48:47,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:48:47,155 INFO L87 Difference]: Start difference. First operand has 432 states, 430 states have (on average 1.5348837209302326) internal successors, (660), 431 states have internal predecessors, (660), 0 states have call successors, (0), 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 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) [2021-11-23 13:48:47,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:47,322 INFO L93 Difference]: Finished difference Result 857 states and 1311 transitions. [2021-11-23 13:48:47,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:48:47,334 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 [2021-11-23 13:48:47,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:47,363 INFO L225 Difference]: With dead ends: 857 [2021-11-23 13:48:47,363 INFO L226 Difference]: Without dead ends: 427 [2021-11-23 13:48:47,374 INFO L932 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 [2021-11-23 13:48:47,379 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 638 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:47,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [638 Valid, 642 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:48:47,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-23 13:48:47,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2021-11-23 13:48:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 1.5) internal successors, (639), 426 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:47,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 639 transitions. [2021-11-23 13:48:47,505 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 639 transitions. Word has length 76 [2021-11-23 13:48:47,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:47,506 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 639 transitions. [2021-11-23 13:48:47,506 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) [2021-11-23 13:48:47,506 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 639 transitions. [2021-11-23 13:48:47,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-23 13:48:47,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:47,511 INFO L514 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] [2021-11-23 13:48:47,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:48:47,512 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:47,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:47,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1606072821, now seen corresponding path program 1 times [2021-11-23 13:48:47,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:47,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493420512] [2021-11-23 13:48:47,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:47,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:47,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:47,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493420512] [2021-11-23 13:48:47,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493420512] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:47,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:47,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:48:47,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207312331] [2021-11-23 13:48:47,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:47,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:48:47,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:47,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:48:47,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:48:47,628 INFO L87 Difference]: Start difference. First operand 427 states and 639 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 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) [2021-11-23 13:48:47,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:47,704 INFO L93 Difference]: Finished difference Result 1166 states and 1742 transitions. [2021-11-23 13:48:47,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:48:47,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 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 [2021-11-23 13:48:47,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:47,714 INFO L225 Difference]: With dead ends: 1166 [2021-11-23 13:48:47,715 INFO L226 Difference]: Without dead ends: 750 [2021-11-23 13:48:47,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:48:47,730 INFO L933 BasicCegarLoop]: 652 mSDtfsCounter, 571 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:47,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 1178 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:48:47,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-11-23 13:48:47,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 748. [2021-11-23 13:48:47,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 1.4912985274431056) internal successors, (1114), 747 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:47,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1114 transitions. [2021-11-23 13:48:47,835 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1114 transitions. Word has length 76 [2021-11-23 13:48:47,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:47,837 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 1114 transitions. [2021-11-23 13:48:47,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 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) [2021-11-23 13:48:47,837 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1114 transitions. [2021-11-23 13:48:47,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-23 13:48:47,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:47,848 INFO L514 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] [2021-11-23 13:48:47,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:48:47,850 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:47,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:47,855 INFO L85 PathProgramCache]: Analyzing trace with hash 2097475659, now seen corresponding path program 1 times [2021-11-23 13:48:47,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:47,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177788888] [2021-11-23 13:48:47,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:47,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:47,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:47,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177788888] [2021-11-23 13:48:47,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177788888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:47,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:48,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:48,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39484571] [2021-11-23 13:48:48,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:48,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:48:48,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:48,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:48:48,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:48:48,004 INFO L87 Difference]: Start difference. First operand 748 states and 1114 transitions. Second operand has 4 states, 4 states have (on average 19.0) 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) [2021-11-23 13:48:48,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:48,187 INFO L93 Difference]: Finished difference Result 1804 states and 2683 transitions. [2021-11-23 13:48:48,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:48:48,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) 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 [2021-11-23 13:48:48,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:48,197 INFO L225 Difference]: With dead ends: 1804 [2021-11-23 13:48:48,197 INFO L226 Difference]: Without dead ends: 1069 [2021-11-23 13:48:48,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:48,209 INFO L933 BasicCegarLoop]: 1093 mSDtfsCounter, 1177 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:48,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1177 Valid, 1628 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:48:48,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-11-23 13:48:48,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 748. [2021-11-23 13:48:48,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 1.4872824631860777) internal successors, (1111), 747 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:48,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1111 transitions. [2021-11-23 13:48:48,267 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1111 transitions. Word has length 76 [2021-11-23 13:48:48,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:48,269 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 1111 transitions. [2021-11-23 13:48:48,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) 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) [2021-11-23 13:48:48,270 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1111 transitions. [2021-11-23 13:48:48,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-23 13:48:48,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:48,275 INFO L514 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] [2021-11-23 13:48:48,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 13:48:48,276 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:48,278 INFO L85 PathProgramCache]: Analyzing trace with hash 2043082761, now seen corresponding path program 1 times [2021-11-23 13:48:48,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:48,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450032521] [2021-11-23 13:48:48,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:48,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:48,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:48,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450032521] [2021-11-23 13:48:48,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450032521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:48,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:48,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:48,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949001232] [2021-11-23 13:48:48,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:48,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:48:48,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:48,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:48:48,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:48:48,390 INFO L87 Difference]: Start difference. First operand 748 states and 1111 transitions. Second operand has 4 states, 4 states have (on average 19.0) 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) [2021-11-23 13:48:48,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:48,533 INFO L93 Difference]: Finished difference Result 1802 states and 2673 transitions. [2021-11-23 13:48:48,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:48:48,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) 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 [2021-11-23 13:48:48,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:48,542 INFO L225 Difference]: With dead ends: 1802 [2021-11-23 13:48:48,546 INFO L226 Difference]: Without dead ends: 1068 [2021-11-23 13:48:48,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:48,556 INFO L933 BasicCegarLoop]: 1088 mSDtfsCounter, 1172 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 1620 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:48,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1172 Valid, 1620 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:48:48,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-11-23 13:48:48,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 748. [2021-11-23 13:48:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 1.4832663989290495) internal successors, (1108), 747 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:48,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1108 transitions. [2021-11-23 13:48:48,632 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1108 transitions. Word has length 76 [2021-11-23 13:48:48,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:48,633 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 1108 transitions. [2021-11-23 13:48:48,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) 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) [2021-11-23 13:48:48,633 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1108 transitions. [2021-11-23 13:48:48,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-23 13:48:48,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:48,635 INFO L514 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] [2021-11-23 13:48:48,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 13:48:48,636 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:48,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:48,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1625686155, now seen corresponding path program 1 times [2021-11-23 13:48:48,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:48,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125766798] [2021-11-23 13:48:48,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:48,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:48,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:48,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125766798] [2021-11-23 13:48:48,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125766798] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:48,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:48,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:48,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344130933] [2021-11-23 13:48:48,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:48,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:48:48,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:48,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:48:48,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:48:48,750 INFO L87 Difference]: Start difference. First operand 748 states and 1108 transitions. Second operand has 4 states, 4 states have (on average 19.0) 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) [2021-11-23 13:48:48,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:48,922 INFO L93 Difference]: Finished difference Result 1800 states and 2663 transitions. [2021-11-23 13:48:48,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:48:48,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) 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 [2021-11-23 13:48:48,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:48,932 INFO L225 Difference]: With dead ends: 1800 [2021-11-23 13:48:48,932 INFO L226 Difference]: Without dead ends: 1067 [2021-11-23 13:48:48,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:48,936 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 1167 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1167 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:48,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1167 Valid, 1612 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:48:48,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-11-23 13:48:48,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 748. [2021-11-23 13:48:48,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 1.4792503346720214) internal successors, (1105), 747 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:48,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1105 transitions. [2021-11-23 13:48:48,996 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1105 transitions. Word has length 76 [2021-11-23 13:48:48,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:48,997 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 1105 transitions. [2021-11-23 13:48:48,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) 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) [2021-11-23 13:48:48,998 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1105 transitions. [2021-11-23 13:48:49,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-23 13:48:49,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:49,011 INFO L514 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] [2021-11-23 13:48:49,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 13:48:49,012 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:49,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:49,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1990008887, now seen corresponding path program 1 times [2021-11-23 13:48:49,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:49,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881171979] [2021-11-23 13:48:49,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:49,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:49,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:49,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881171979] [2021-11-23 13:48:49,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881171979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:49,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:49,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:49,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774154291] [2021-11-23 13:48:49,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:49,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:48:49,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:49,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:48:49,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:48:49,090 INFO L87 Difference]: Start difference. First operand 748 states and 1105 transitions. Second operand has 4 states, 4 states have (on average 19.0) 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) [2021-11-23 13:48:49,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:49,314 INFO L93 Difference]: Finished difference Result 1762 states and 2602 transitions. [2021-11-23 13:48:49,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:48:49,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) 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 [2021-11-23 13:48:49,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:49,323 INFO L225 Difference]: With dead ends: 1762 [2021-11-23 13:48:49,324 INFO L226 Difference]: Without dead ends: 1030 [2021-11-23 13:48:49,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:49,327 INFO L933 BasicCegarLoop]: 1001 mSDtfsCounter, 1108 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:49,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1108 Valid, 1511 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:48:49,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-11-23 13:48:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 748. [2021-11-23 13:48:49,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 1.4752342704149932) internal successors, (1102), 747 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:49,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1102 transitions. [2021-11-23 13:48:49,394 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1102 transitions. Word has length 76 [2021-11-23 13:48:49,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:49,394 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 1102 transitions. [2021-11-23 13:48:49,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) 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) [2021-11-23 13:48:49,395 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1102 transitions. [2021-11-23 13:48:49,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-23 13:48:49,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:49,396 INFO L514 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] [2021-11-23 13:48:49,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 13:48:49,397 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:49,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:49,398 INFO L85 PathProgramCache]: Analyzing trace with hash -28434229, now seen corresponding path program 1 times [2021-11-23 13:48:49,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:49,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764723228] [2021-11-23 13:48:49,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:49,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:49,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:49,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764723228] [2021-11-23 13:48:49,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764723228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:49,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:49,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:49,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126018530] [2021-11-23 13:48:49,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:49,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:48:49,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:49,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:48:49,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:48:49,446 INFO L87 Difference]: Start difference. First operand 748 states and 1102 transitions. Second operand has 4 states, 4 states have (on average 19.0) 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) [2021-11-23 13:48:49,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:49,660 INFO L93 Difference]: Finished difference Result 1759 states and 2591 transitions. [2021-11-23 13:48:49,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:48:49,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) 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 [2021-11-23 13:48:49,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:49,669 INFO L225 Difference]: With dead ends: 1759 [2021-11-23 13:48:49,669 INFO L226 Difference]: Without dead ends: 1028 [2021-11-23 13:48:49,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:49,675 INFO L933 BasicCegarLoop]: 599 mSDtfsCounter, 1509 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1509 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:49,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1509 Valid, 1106 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:48:49,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-11-23 13:48:49,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 748. [2021-11-23 13:48:49,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 1.4712182061579653) internal successors, (1099), 747 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:49,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1099 transitions. [2021-11-23 13:48:49,767 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1099 transitions. Word has length 76 [2021-11-23 13:48:49,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:49,767 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 1099 transitions. [2021-11-23 13:48:49,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) 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) [2021-11-23 13:48:49,768 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1099 transitions. [2021-11-23 13:48:49,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-23 13:48:49,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:49,770 INFO L514 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] [2021-11-23 13:48:49,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 13:48:49,770 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:49,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:49,772 INFO L85 PathProgramCache]: Analyzing trace with hash 173389705, now seen corresponding path program 1 times [2021-11-23 13:48:49,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:49,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026925992] [2021-11-23 13:48:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:49,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:49,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:49,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026925992] [2021-11-23 13:48:49,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026925992] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:49,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:49,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:48:49,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209668723] [2021-11-23 13:48:49,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:49,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:48:49,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:49,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:48:49,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:48:49,846 INFO L87 Difference]: Start difference. First operand 748 states and 1099 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 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) [2021-11-23 13:48:49,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:49,953 INFO L93 Difference]: Finished difference Result 1478 states and 2174 transitions. [2021-11-23 13:48:49,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:48:49,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 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 [2021-11-23 13:48:49,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:49,960 INFO L225 Difference]: With dead ends: 1478 [2021-11-23 13:48:49,961 INFO L226 Difference]: Without dead ends: 748 [2021-11-23 13:48:49,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:48:49,967 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 546 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:49,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 651 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:48:49,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-11-23 13:48:50,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 748. [2021-11-23 13:48:50,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 1.4444444444444444) internal successors, (1079), 747 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:50,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1079 transitions. [2021-11-23 13:48:50,035 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1079 transitions. Word has length 76 [2021-11-23 13:48:50,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:50,036 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 1079 transitions. [2021-11-23 13:48:50,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 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) [2021-11-23 13:48:50,037 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1079 transitions. [2021-11-23 13:48:50,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-23 13:48:50,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:50,038 INFO L514 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] [2021-11-23 13:48:50,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 13:48:50,039 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:50,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:50,041 INFO L85 PathProgramCache]: Analyzing trace with hash 638475082, now seen corresponding path program 1 times [2021-11-23 13:48:50,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:50,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510283311] [2021-11-23 13:48:50,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:50,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:50,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:50,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510283311] [2021-11-23 13:48:50,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510283311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:50,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:50,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:50,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809491044] [2021-11-23 13:48:50,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:50,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:48:50,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:50,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:48:50,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:48:50,112 INFO L87 Difference]: Start difference. First operand 748 states and 1079 transitions. Second operand has 4 states, 4 states have (on average 19.0) 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) [2021-11-23 13:48:50,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:50,330 INFO L93 Difference]: Finished difference Result 1756 states and 2533 transitions. [2021-11-23 13:48:50,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:48:50,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) 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 [2021-11-23 13:48:50,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:50,339 INFO L225 Difference]: With dead ends: 1756 [2021-11-23 13:48:50,339 INFO L226 Difference]: Without dead ends: 1027 [2021-11-23 13:48:50,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:50,343 INFO L933 BasicCegarLoop]: 971 mSDtfsCounter, 1076 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:50,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1076 Valid, 1464 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:48:50,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2021-11-23 13:48:50,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 748. [2021-11-23 13:48:50,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 1.4404283801874163) internal successors, (1076), 747 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:50,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1076 transitions. [2021-11-23 13:48:50,412 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1076 transitions. Word has length 76 [2021-11-23 13:48:50,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:50,413 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 1076 transitions. [2021-11-23 13:48:50,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) 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) [2021-11-23 13:48:50,413 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1076 transitions. [2021-11-23 13:48:50,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-23 13:48:50,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:50,414 INFO L514 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] [2021-11-23 13:48:50,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 13:48:50,415 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:50,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:50,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1072204168, now seen corresponding path program 1 times [2021-11-23 13:48:50,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:50,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91874255] [2021-11-23 13:48:50,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:50,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:50,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:50,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:50,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91874255] [2021-11-23 13:48:50,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91874255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:50,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:50,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:48:50,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243660957] [2021-11-23 13:48:50,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:50,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:48:50,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:50,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:48:50,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:48:50,470 INFO L87 Difference]: Start difference. First operand 748 states and 1076 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 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) [2021-11-23 13:48:50,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:50,638 INFO L93 Difference]: Finished difference Result 2133 states and 3065 transitions. [2021-11-23 13:48:50,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:48:50,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 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 [2021-11-23 13:48:50,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:50,649 INFO L225 Difference]: With dead ends: 2133 [2021-11-23 13:48:50,649 INFO L226 Difference]: Without dead ends: 1407 [2021-11-23 13:48:50,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:48:50,652 INFO L933 BasicCegarLoop]: 601 mSDtfsCounter, 560 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:50,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 1100 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:48:50,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-11-23 13:48:50,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1339. [2021-11-23 13:48:50,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 1.4275037369207773) internal successors, (1910), 1338 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:50,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 1910 transitions. [2021-11-23 13:48:50,805 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 1910 transitions. Word has length 76 [2021-11-23 13:48:50,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:50,806 INFO L470 AbstractCegarLoop]: Abstraction has 1339 states and 1910 transitions. [2021-11-23 13:48:50,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 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) [2021-11-23 13:48:50,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 1910 transitions. [2021-11-23 13:48:50,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 13:48:50,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:50,810 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:50,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 13:48:50,811 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:50,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:50,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1110276243, now seen corresponding path program 1 times [2021-11-23 13:48:50,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:50,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906769165] [2021-11-23 13:48:50,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:50,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:48:50,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:50,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906769165] [2021-11-23 13:48:50,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906769165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:50,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:50,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:48:50,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611946502] [2021-11-23 13:48:50,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:50,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:48:50,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:50,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:48:50,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:50,879 INFO L87 Difference]: Start difference. First operand 1339 states and 1910 transitions. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:51,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:51,259 INFO L93 Difference]: Finished difference Result 3905 states and 5575 transitions. [2021-11-23 13:48:51,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:48:51,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 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 123 [2021-11-23 13:48:51,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:51,280 INFO L225 Difference]: With dead ends: 3905 [2021-11-23 13:48:51,280 INFO L226 Difference]: Without dead ends: 2592 [2021-11-23 13:48:51,283 INFO L932 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 [2021-11-23 13:48:51,285 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 2017 mSDsluCounter, 2449 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2017 SdHoareTripleChecker+Valid, 3034 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:51,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2017 Valid, 3034 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:48:51,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-11-23 13:48:51,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 1378. [2021-11-23 13:48:51,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 1.4066811909949164) internal successors, (1937), 1377 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 1937 transitions. [2021-11-23 13:48:51,452 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 1937 transitions. Word has length 123 [2021-11-23 13:48:51,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:51,453 INFO L470 AbstractCegarLoop]: Abstraction has 1378 states and 1937 transitions. [2021-11-23 13:48:51,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:51,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 1937 transitions. [2021-11-23 13:48:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 13:48:51,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:51,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:51,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 13:48:51,457 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:51,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:51,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1449452431, now seen corresponding path program 1 times [2021-11-23 13:48:51,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:51,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666843528] [2021-11-23 13:48:51,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:51,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:48:51,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:51,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666843528] [2021-11-23 13:48:51,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666843528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:51,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:51,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:48:51,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469577211] [2021-11-23 13:48:51,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:51,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:48:51,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:51,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:48:51,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:51,514 INFO L87 Difference]: Start difference. First operand 1378 states and 1937 transitions. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:51,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:51,839 INFO L93 Difference]: Finished difference Result 3684 states and 5167 transitions. [2021-11-23 13:48:51,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:48:51,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 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 123 [2021-11-23 13:48:51,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:51,856 INFO L225 Difference]: With dead ends: 3684 [2021-11-23 13:48:51,857 INFO L226 Difference]: Without dead ends: 2346 [2021-11-23 13:48:51,860 INFO L932 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 [2021-11-23 13:48:51,861 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 1476 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 1784 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:51,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1476 Valid, 1784 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:48:51,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-11-23 13:48:51,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1390. [2021-11-23 13:48:52,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 1.3880489560835134) internal successors, (1928), 1389 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:52,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 1928 transitions. [2021-11-23 13:48:52,009 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 1928 transitions. Word has length 123 [2021-11-23 13:48:52,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:52,010 INFO L470 AbstractCegarLoop]: Abstraction has 1390 states and 1928 transitions. [2021-11-23 13:48:52,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:52,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 1928 transitions. [2021-11-23 13:48:52,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 13:48:52,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:52,013 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:52,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 13:48:52,014 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:52,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:52,015 INFO L85 PathProgramCache]: Analyzing trace with hash -234362741, now seen corresponding path program 1 times [2021-11-23 13:48:52,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:52,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724112189] [2021-11-23 13:48:52,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:52,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:48:52,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:52,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724112189] [2021-11-23 13:48:52,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724112189] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:52,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:52,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:48:52,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509115773] [2021-11-23 13:48:52,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:52,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:48:52,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:52,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:48:52,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:52,070 INFO L87 Difference]: Start difference. First operand 1390 states and 1928 transitions. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:52,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:52,538 INFO L93 Difference]: Finished difference Result 4660 states and 6511 transitions. [2021-11-23 13:48:52,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:48:52,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 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 123 [2021-11-23 13:48:52,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:52,565 INFO L225 Difference]: With dead ends: 4660 [2021-11-23 13:48:52,565 INFO L226 Difference]: Without dead ends: 3317 [2021-11-23 13:48:52,569 INFO L932 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 [2021-11-23 13:48:52,571 INFO L933 BasicCegarLoop]: 764 mSDtfsCounter, 1461 mSDsluCounter, 2300 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1461 SdHoareTripleChecker+Valid, 3064 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:52,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1461 Valid, 3064 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:48:52,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3317 states. [2021-11-23 13:48:52,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3317 to 1465. [2021-11-23 13:48:52,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 1.3681693989071038) internal successors, (2003), 1464 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:52,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 2003 transitions. [2021-11-23 13:48:52,810 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 2003 transitions. Word has length 123 [2021-11-23 13:48:52,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:52,811 INFO L470 AbstractCegarLoop]: Abstraction has 1465 states and 2003 transitions. [2021-11-23 13:48:52,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:52,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 2003 transitions. [2021-11-23 13:48:52,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 13:48:52,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:52,815 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:52,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 13:48:52,816 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:52,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:52,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1376865207, now seen corresponding path program 1 times [2021-11-23 13:48:52,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:52,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656145081] [2021-11-23 13:48:52,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:52,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:48:52,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:52,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656145081] [2021-11-23 13:48:52,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656145081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:52,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:52,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:48:52,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995371755] [2021-11-23 13:48:52,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:52,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:48:52,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:52,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:48:52,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:48:52,886 INFO L87 Difference]: Start difference. First operand 1465 states and 2003 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:53,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:53,221 INFO L93 Difference]: Finished difference Result 4085 states and 5594 transitions. [2021-11-23 13:48:53,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:48:53,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 0 states have call successors, (0), 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 123 [2021-11-23 13:48:53,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:53,240 INFO L225 Difference]: With dead ends: 4085 [2021-11-23 13:48:53,240 INFO L226 Difference]: Without dead ends: 2672 [2021-11-23 13:48:53,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:48:53,244 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 483 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:53,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 1082 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:48:53,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-11-23 13:48:53,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2662. [2021-11-23 13:48:53,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 2661 states have (on average 1.3615182262307404) internal successors, (3623), 2661 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:53,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3623 transitions. [2021-11-23 13:48:53,580 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 3623 transitions. Word has length 123 [2021-11-23 13:48:53,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:53,581 INFO L470 AbstractCegarLoop]: Abstraction has 2662 states and 3623 transitions. [2021-11-23 13:48:53,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:53,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 3623 transitions. [2021-11-23 13:48:53,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 13:48:53,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:53,585 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:53,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 13:48:53,586 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:53,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:53,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1640949416, now seen corresponding path program 1 times [2021-11-23 13:48:53,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:53,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556034930] [2021-11-23 13:48:53,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:53,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:48:53,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:53,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556034930] [2021-11-23 13:48:53,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556034930] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:53,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:53,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:48:53,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980013136] [2021-11-23 13:48:53,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:53,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:48:53,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:53,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:48:53,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:53,673 INFO L87 Difference]: Start difference. First operand 2662 states and 3623 transitions. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:54,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:54,297 INFO L93 Difference]: Finished difference Result 7058 states and 9659 transitions. [2021-11-23 13:48:54,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:48:54,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 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 123 [2021-11-23 13:48:54,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:54,332 INFO L225 Difference]: With dead ends: 7058 [2021-11-23 13:48:54,332 INFO L226 Difference]: Without dead ends: 4452 [2021-11-23 13:48:54,338 INFO L932 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 [2021-11-23 13:48:54,339 INFO L933 BasicCegarLoop]: 574 mSDtfsCounter, 1340 mSDsluCounter, 1989 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 2563 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:54,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1340 Valid, 2563 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:48:54,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4452 states. [2021-11-23 13:48:54,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4452 to 2734. [2021-11-23 13:48:54,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2734 states, 2733 states have (on average 1.3443102817416759) internal successors, (3674), 2733 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:54,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 3674 transitions. [2021-11-23 13:48:54,825 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 3674 transitions. Word has length 123 [2021-11-23 13:48:54,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:54,825 INFO L470 AbstractCegarLoop]: Abstraction has 2734 states and 3674 transitions. [2021-11-23 13:48:54,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:54,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 3674 transitions. [2021-11-23 13:48:54,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 13:48:54,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:54,830 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:54,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 13:48:54,831 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:54,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:54,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1710523812, now seen corresponding path program 1 times [2021-11-23 13:48:54,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:54,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043791592] [2021-11-23 13:48:54,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:54,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:54,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:48:54,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:54,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043791592] [2021-11-23 13:48:54,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043791592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:54,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:54,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:54,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669159298] [2021-11-23 13:48:54,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:54,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:48:54,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:54,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:48:54,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:48:54,889 INFO L87 Difference]: Start difference. First operand 2734 states and 3674 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:55,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:55,531 INFO L93 Difference]: Finished difference Result 7083 states and 9466 transitions. [2021-11-23 13:48:55,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:48:55,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 123 [2021-11-23 13:48:55,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:55,553 INFO L225 Difference]: With dead ends: 7083 [2021-11-23 13:48:55,553 INFO L226 Difference]: Without dead ends: 4408 [2021-11-23 13:48:55,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:55,561 INFO L933 BasicCegarLoop]: 586 mSDtfsCounter, 1516 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:55,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1516 Valid, 1320 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:48:55,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4408 states. [2021-11-23 13:48:55,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4408 to 3189. [2021-11-23 13:48:55,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3189 states, 3188 states have (on average 1.3240276035131744) internal successors, (4221), 3188 states have internal predecessors, (4221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:56,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3189 states to 3189 states and 4221 transitions. [2021-11-23 13:48:56,003 INFO L78 Accepts]: Start accepts. Automaton has 3189 states and 4221 transitions. Word has length 123 [2021-11-23 13:48:56,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:56,004 INFO L470 AbstractCegarLoop]: Abstraction has 3189 states and 4221 transitions. [2021-11-23 13:48:56,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:56,004 INFO L276 IsEmpty]: Start isEmpty. Operand 3189 states and 4221 transitions. [2021-11-23 13:48:56,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 13:48:56,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:56,009 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:56,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 13:48:56,009 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:56,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:56,010 INFO L85 PathProgramCache]: Analyzing trace with hash 743173158, now seen corresponding path program 1 times [2021-11-23 13:48:56,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:56,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080367305] [2021-11-23 13:48:56,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:56,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:48:56,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:56,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080367305] [2021-11-23 13:48:56,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080367305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:56,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:56,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:56,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876790936] [2021-11-23 13:48:56,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:56,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:48:56,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:56,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:48:56,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:48:56,074 INFO L87 Difference]: Start difference. First operand 3189 states and 4221 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:56,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:56,666 INFO L93 Difference]: Finished difference Result 7685 states and 10171 transitions. [2021-11-23 13:48:56,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:48:56,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 123 [2021-11-23 13:48:56,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:56,681 INFO L225 Difference]: With dead ends: 7685 [2021-11-23 13:48:56,681 INFO L226 Difference]: Without dead ends: 4603 [2021-11-23 13:48:56,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:56,688 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 1504 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1504 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:56,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1504 Valid, 1084 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:48:56,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4603 states. [2021-11-23 13:48:57,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4603 to 3189. [2021-11-23 13:48:57,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3189 states, 3188 states have (on average 1.3186951066499373) internal successors, (4204), 3188 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:57,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3189 states to 3189 states and 4204 transitions. [2021-11-23 13:48:57,173 INFO L78 Accepts]: Start accepts. Automaton has 3189 states and 4204 transitions. Word has length 123 [2021-11-23 13:48:57,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:57,174 INFO L470 AbstractCegarLoop]: Abstraction has 3189 states and 4204 transitions. [2021-11-23 13:48:57,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:57,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3189 states and 4204 transitions. [2021-11-23 13:48:57,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 13:48:57,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:57,179 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:57,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 13:48:57,180 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:57,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:57,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1643336348, now seen corresponding path program 1 times [2021-11-23 13:48:57,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:57,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414998510] [2021-11-23 13:48:57,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:57,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:48:57,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:57,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414998510] [2021-11-23 13:48:57,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414998510] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:57,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:57,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:57,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142554717] [2021-11-23 13:48:57,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:57,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:48:57,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:57,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:48:57,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:48:57,232 INFO L87 Difference]: Start difference. First operand 3189 states and 4204 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:57,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:57,999 INFO L93 Difference]: Finished difference Result 7684 states and 10132 transitions. [2021-11-23 13:48:58,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:48:58,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 123 [2021-11-23 13:48:58,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:58,012 INFO L225 Difference]: With dead ends: 7684 [2021-11-23 13:48:58,013 INFO L226 Difference]: Without dead ends: 4603 [2021-11-23 13:48:58,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:58,019 INFO L933 BasicCegarLoop]: 582 mSDtfsCounter, 1497 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1497 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:58,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1497 Valid, 1079 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:48:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4603 states. [2021-11-23 13:48:58,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4603 to 3189. [2021-11-23 13:48:58,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3189 states, 3188 states have (on average 1.3133626097867002) internal successors, (4187), 3188 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3189 states to 3189 states and 4187 transitions. [2021-11-23 13:48:58,416 INFO L78 Accepts]: Start accepts. Automaton has 3189 states and 4187 transitions. Word has length 123 [2021-11-23 13:48:58,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:58,416 INFO L470 AbstractCegarLoop]: Abstraction has 3189 states and 4187 transitions. [2021-11-23 13:48:58,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:58,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3189 states and 4187 transitions. [2021-11-23 13:48:58,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 13:48:58,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:58,422 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:58,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 13:48:58,422 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:58,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:58,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2135962522, now seen corresponding path program 1 times [2021-11-23 13:48:58,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:58,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324567304] [2021-11-23 13:48:58,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:58,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:58,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:48:58,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:58,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324567304] [2021-11-23 13:48:58,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324567304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:58,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:58,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:58,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405261134] [2021-11-23 13:48:58,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:58,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:48:58,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:58,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:48:58,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:48:58,469 INFO L87 Difference]: Start difference. First operand 3189 states and 4187 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:59,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:59,107 INFO L93 Difference]: Finished difference Result 7683 states and 10093 transitions. [2021-11-23 13:48:59,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:48:59,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 123 [2021-11-23 13:48:59,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:59,120 INFO L225 Difference]: With dead ends: 7683 [2021-11-23 13:48:59,121 INFO L226 Difference]: Without dead ends: 4603 [2021-11-23 13:48:59,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:59,127 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 1490 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:59,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1490 Valid, 1074 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:48:59,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4603 states. [2021-11-23 13:48:59,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4603 to 3189. [2021-11-23 13:48:59,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3189 states, 3188 states have (on average 1.308030112923463) internal successors, (4170), 3188 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:59,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3189 states to 3189 states and 4170 transitions. [2021-11-23 13:48:59,519 INFO L78 Accepts]: Start accepts. Automaton has 3189 states and 4170 transitions. Word has length 123 [2021-11-23 13:48:59,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:59,519 INFO L470 AbstractCegarLoop]: Abstraction has 3189 states and 4170 transitions. [2021-11-23 13:48:59,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:59,520 INFO L276 IsEmpty]: Start isEmpty. Operand 3189 states and 4170 transitions. [2021-11-23 13:48:59,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 13:48:59,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:59,524 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:59,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 13:48:59,525 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:59,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:59,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1182022364, now seen corresponding path program 1 times [2021-11-23 13:48:59,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:59,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246210450] [2021-11-23 13:48:59,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:59,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:48:59,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:59,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246210450] [2021-11-23 13:48:59,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246210450] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:59,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:59,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:59,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949927159] [2021-11-23 13:48:59,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:59,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:48:59,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:59,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:48:59,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:48:59,571 INFO L87 Difference]: Start difference. First operand 3189 states and 4170 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:00,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:00,167 INFO L93 Difference]: Finished difference Result 7562 states and 9893 transitions. [2021-11-23 13:49:00,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:49:00,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 123 [2021-11-23 13:49:00,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:00,179 INFO L225 Difference]: With dead ends: 7562 [2021-11-23 13:49:00,180 INFO L226 Difference]: Without dead ends: 4483 [2021-11-23 13:49:00,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:49:00,186 INFO L933 BasicCegarLoop]: 602 mSDtfsCounter, 1344 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1344 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:00,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1344 Valid, 1162 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:49:00,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4483 states. [2021-11-23 13:49:00,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4483 to 3111. [2021-11-23 13:49:00,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3111 states, 3110 states have (on average 1.2935691318327975) internal successors, (4023), 3110 states have internal predecessors, (4023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 4023 transitions. [2021-11-23 13:49:00,496 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 4023 transitions. Word has length 123 [2021-11-23 13:49:00,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:00,496 INFO L470 AbstractCegarLoop]: Abstraction has 3111 states and 4023 transitions. [2021-11-23 13:49:00,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:00,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 4023 transitions. [2021-11-23 13:49:00,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 13:49:00,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:00,501 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:00,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 13:49:00,502 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:00,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:00,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1896791206, now seen corresponding path program 1 times [2021-11-23 13:49:00,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:00,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817106059] [2021-11-23 13:49:00,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:00,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:49:00,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:00,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817106059] [2021-11-23 13:49:00,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817106059] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:49:00,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:49:00,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:49:00,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75410121] [2021-11-23 13:49:00,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:49:00,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:49:00,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:00,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:49:00,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:49:00,549 INFO L87 Difference]: Start difference. First operand 3111 states and 4023 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:01,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:01,258 INFO L93 Difference]: Finished difference Result 7274 states and 9394 transitions. [2021-11-23 13:49:01,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:49:01,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 123 [2021-11-23 13:49:01,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:01,271 INFO L225 Difference]: With dead ends: 7274 [2021-11-23 13:49:01,271 INFO L226 Difference]: Without dead ends: 4245 [2021-11-23 13:49:01,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:49:01,278 INFO L933 BasicCegarLoop]: 556 mSDtfsCounter, 1277 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:01,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1277 Valid, 1072 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:49:01,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2021-11-23 13:49:01,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 2973. [2021-11-23 13:49:01,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2973 states, 2972 states have (on average 1.2705248990578735) internal successors, (3776), 2972 states have internal predecessors, (3776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:01,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 3776 transitions. [2021-11-23 13:49:01,684 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 3776 transitions. Word has length 123 [2021-11-23 13:49:01,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:01,684 INFO L470 AbstractCegarLoop]: Abstraction has 2973 states and 3776 transitions. [2021-11-23 13:49:01,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:01,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 3776 transitions. [2021-11-23 13:49:01,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 13:49:01,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:01,688 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:01,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 13:49:01,689 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:01,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:01,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1847293697, now seen corresponding path program 1 times [2021-11-23 13:49:01,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:01,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662751926] [2021-11-23 13:49:01,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:01,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:49:01,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:01,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662751926] [2021-11-23 13:49:01,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662751926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:49:01,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:49:01,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:49:01,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882409362] [2021-11-23 13:49:01,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:49:01,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:49:01,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:01,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:49:01,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:49:01,736 INFO L87 Difference]: Start difference. First operand 2973 states and 3776 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:02,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:02,394 INFO L93 Difference]: Finished difference Result 7690 states and 9731 transitions. [2021-11-23 13:49:02,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:49:02,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 123 [2021-11-23 13:49:02,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:02,408 INFO L225 Difference]: With dead ends: 7690 [2021-11-23 13:49:02,408 INFO L226 Difference]: Without dead ends: 4825 [2021-11-23 13:49:02,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:49:02,415 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 1228 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1228 SdHoareTripleChecker+Valid, 1231 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:02,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1228 Valid, 1231 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:49:02,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4825 states. [2021-11-23 13:49:02,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4825 to 3661. [2021-11-23 13:49:02,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3661 states, 3660 states have (on average 1.2448087431693988) internal successors, (4556), 3660 states have internal predecessors, (4556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:02,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3661 states to 3661 states and 4556 transitions. [2021-11-23 13:49:02,752 INFO L78 Accepts]: Start accepts. Automaton has 3661 states and 4556 transitions. Word has length 123 [2021-11-23 13:49:02,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:02,753 INFO L470 AbstractCegarLoop]: Abstraction has 3661 states and 4556 transitions. [2021-11-23 13:49:02,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:02,753 INFO L276 IsEmpty]: Start isEmpty. Operand 3661 states and 4556 transitions. [2021-11-23 13:49:02,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 13:49:02,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:02,757 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:02,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-23 13:49:02,758 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:02,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:02,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1429897091, now seen corresponding path program 1 times [2021-11-23 13:49:02,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:02,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325385716] [2021-11-23 13:49:02,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:02,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:49:02,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:02,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325385716] [2021-11-23 13:49:02,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325385716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:49:02,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:49:02,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:49:02,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461342107] [2021-11-23 13:49:02,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:49:02,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:49:02,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:02,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:49:02,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:49:02,807 INFO L87 Difference]: Start difference. First operand 3661 states and 4556 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:03,702 INFO L93 Difference]: Finished difference Result 12171 states and 15084 transitions. [2021-11-23 13:49:03,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:49:03,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2021-11-23 13:49:03,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:03,726 INFO L225 Difference]: With dead ends: 12171 [2021-11-23 13:49:03,726 INFO L226 Difference]: Without dead ends: 8570 [2021-11-23 13:49:03,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:49:03,734 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 1231 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1231 SdHoareTripleChecker+Valid, 1560 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:03,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1231 Valid, 1560 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:49:03,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8570 states. [2021-11-23 13:49:04,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8570 to 6731. [2021-11-23 13:49:04,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6731 states, 6730 states have (on average 1.2317979197622586) internal successors, (8290), 6730 states have internal predecessors, (8290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:04,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6731 states to 6731 states and 8290 transitions. [2021-11-23 13:49:04,401 INFO L78 Accepts]: Start accepts. Automaton has 6731 states and 8290 transitions. Word has length 123 [2021-11-23 13:49:04,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:04,402 INFO L470 AbstractCegarLoop]: Abstraction has 6731 states and 8290 transitions. [2021-11-23 13:49:04,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:04,402 INFO L276 IsEmpty]: Start isEmpty. Operand 6731 states and 8290 transitions. [2021-11-23 13:49:04,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 13:49:04,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:04,409 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:04,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 13:49:04,409 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:04,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:04,410 INFO L85 PathProgramCache]: Analyzing trace with hash -725617310, now seen corresponding path program 1 times [2021-11-23 13:49:04,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:04,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861344598] [2021-11-23 13:49:04,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:04,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:49:04,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:04,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861344598] [2021-11-23 13:49:04,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861344598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:49:04,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:49:04,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:49:04,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660410873] [2021-11-23 13:49:04,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:49:04,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:49:04,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:04,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:49:04,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:49:04,462 INFO L87 Difference]: Start difference. First operand 6731 states and 8290 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:05,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:05,807 INFO L93 Difference]: Finished difference Result 19264 states and 23717 transitions. [2021-11-23 13:49:05,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:49:05,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2021-11-23 13:49:05,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:05,847 INFO L225 Difference]: With dead ends: 19264 [2021-11-23 13:49:05,848 INFO L226 Difference]: Without dead ends: 12609 [2021-11-23 13:49:05,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:49:05,862 INFO L933 BasicCegarLoop]: 517 mSDtfsCounter, 1627 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1627 SdHoareTripleChecker+Valid, 2406 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:05,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1627 Valid, 2406 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:49:05,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12609 states. [2021-11-23 13:49:06,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12609 to 6935. [2021-11-23 13:49:06,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6935 states, 6934 states have (on average 1.2157484857225267) internal successors, (8430), 6934 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:06,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6935 states to 6935 states and 8430 transitions. [2021-11-23 13:49:06,819 INFO L78 Accepts]: Start accepts. Automaton has 6935 states and 8430 transitions. Word has length 123 [2021-11-23 13:49:06,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:06,820 INFO L470 AbstractCegarLoop]: Abstraction has 6935 states and 8430 transitions. [2021-11-23 13:49:06,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:06,820 INFO L276 IsEmpty]: Start isEmpty. Operand 6935 states and 8430 transitions. [2021-11-23 13:49:06,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 13:49:06,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:06,826 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:06,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-23 13:49:06,827 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:06,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:06,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1754976608, now seen corresponding path program 1 times [2021-11-23 13:49:06,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:06,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053806469] [2021-11-23 13:49:06,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:06,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:49:06,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:06,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053806469] [2021-11-23 13:49:06,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053806469] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:49:06,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:49:06,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:49:06,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964124619] [2021-11-23 13:49:06,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:49:06,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:49:06,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:06,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:49:06,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:49:06,876 INFO L87 Difference]: Start difference. First operand 6935 states and 8430 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:08,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:08,066 INFO L93 Difference]: Finished difference Result 20103 states and 24336 transitions. [2021-11-23 13:49:08,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:49:08,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2021-11-23 13:49:08,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:08,089 INFO L225 Difference]: With dead ends: 20103 [2021-11-23 13:49:08,089 INFO L226 Difference]: Without dead ends: 13353 [2021-11-23 13:49:08,103 INFO L932 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 [2021-11-23 13:49:08,104 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 385 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:08,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 1039 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:49:08,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13353 states. [2021-11-23 13:49:09,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13353 to 13131. [2021-11-23 13:49:09,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13131 states, 13130 states have (on average 1.2025894897182026) internal successors, (15790), 13130 states have internal predecessors, (15790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:09,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13131 states to 13131 states and 15790 transitions. [2021-11-23 13:49:09,395 INFO L78 Accepts]: Start accepts. Automaton has 13131 states and 15790 transitions. Word has length 123 [2021-11-23 13:49:09,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:09,396 INFO L470 AbstractCegarLoop]: Abstraction has 13131 states and 15790 transitions. [2021-11-23 13:49:09,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:09,397 INFO L276 IsEmpty]: Start isEmpty. Operand 13131 states and 15790 transitions. [2021-11-23 13:49:09,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-23 13:49:09,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:09,406 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:09,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-23 13:49:09,406 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:09,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:09,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1577472801, now seen corresponding path program 1 times [2021-11-23 13:49:09,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:09,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915730339] [2021-11-23 13:49:09,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:09,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:49:09,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:09,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915730339] [2021-11-23 13:49:09,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915730339] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:49:09,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:49:09,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:49:09,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734514084] [2021-11-23 13:49:09,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:49:09,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:49:09,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:09,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:49:09,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:49:09,487 INFO L87 Difference]: Start difference. First operand 13131 states and 15790 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:12,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:12,040 INFO L93 Difference]: Finished difference Result 37633 states and 45188 transitions. [2021-11-23 13:49:12,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:49:12,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2021-11-23 13:49:12,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:12,077 INFO L225 Difference]: With dead ends: 37633 [2021-11-23 13:49:12,077 INFO L226 Difference]: Without dead ends: 24687 [2021-11-23 13:49:12,092 INFO L932 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 [2021-11-23 13:49:12,093 INFO L933 BasicCegarLoop]: 719 mSDtfsCounter, 362 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:12,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 1239 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:49:12,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24687 states. [2021-11-23 13:49:14,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24687 to 24685. [2021-11-23 13:49:15,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24685 states, 24684 states have (on average 1.1959974072273538) internal successors, (29522), 24684 states have internal predecessors, (29522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:15,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24685 states to 24685 states and 29522 transitions. [2021-11-23 13:49:15,058 INFO L78 Accepts]: Start accepts. Automaton has 24685 states and 29522 transitions. Word has length 124 [2021-11-23 13:49:15,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:15,058 INFO L470 AbstractCegarLoop]: Abstraction has 24685 states and 29522 transitions. [2021-11-23 13:49:15,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:15,058 INFO L276 IsEmpty]: Start isEmpty. Operand 24685 states and 29522 transitions. [2021-11-23 13:49:15,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-23 13:49:15,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:15,075 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:15,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-23 13:49:15,075 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:15,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:15,076 INFO L85 PathProgramCache]: Analyzing trace with hash 875018781, now seen corresponding path program 1 times [2021-11-23 13:49:15,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:15,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522249426] [2021-11-23 13:49:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:15,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:49:15,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:15,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522249426] [2021-11-23 13:49:15,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522249426] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:49:15,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:49:15,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:49:15,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704059148] [2021-11-23 13:49:15,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:49:15,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:49:15,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:15,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:49:15,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:49:15,107 INFO L87 Difference]: Start difference. First operand 24685 states and 29522 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:17,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:17,289 INFO L93 Difference]: Finished difference Result 49007 states and 58643 transitions. [2021-11-23 13:49:17,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:49:17,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 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 124 [2021-11-23 13:49:17,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:17,325 INFO L225 Difference]: With dead ends: 49007 [2021-11-23 13:49:17,325 INFO L226 Difference]: Without dead ends: 24507 [2021-11-23 13:49:17,344 INFO L932 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 [2021-11-23 13:49:17,345 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 534 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:17,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 539 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:49:17,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24507 states. [2021-11-23 13:49:20,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24507 to 24507. [2021-11-23 13:49:20,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24507 states, 24506 states have (on average 1.1966457194156532) internal successors, (29325), 24506 states have internal predecessors, (29325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24507 states to 24507 states and 29325 transitions. [2021-11-23 13:49:20,146 INFO L78 Accepts]: Start accepts. Automaton has 24507 states and 29325 transitions. Word has length 124 [2021-11-23 13:49:20,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:20,146 INFO L470 AbstractCegarLoop]: Abstraction has 24507 states and 29325 transitions. [2021-11-23 13:49:20,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:20,147 INFO L276 IsEmpty]: Start isEmpty. Operand 24507 states and 29325 transitions. [2021-11-23 13:49:20,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 13:49:20,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:20,162 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:20,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-23 13:49:20,163 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:20,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:20,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1919986320, now seen corresponding path program 1 times [2021-11-23 13:49:20,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:20,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031345728] [2021-11-23 13:49:20,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:20,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:49:20,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:20,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031345728] [2021-11-23 13:49:20,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031345728] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:49:20,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:49:20,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:49:20,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338066308] [2021-11-23 13:49:20,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:49:20,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:49:20,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:20,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:49:20,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:49:20,222 INFO L87 Difference]: Start difference. First operand 24507 states and 29325 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:24,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:24,926 INFO L93 Difference]: Finished difference Result 70432 states and 84273 transitions. [2021-11-23 13:49:24,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:49:24,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-11-23 13:49:24,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:24,987 INFO L225 Difference]: With dead ends: 70432 [2021-11-23 13:49:24,987 INFO L226 Difference]: Without dead ends: 46110 [2021-11-23 13:49:25,007 INFO L932 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 [2021-11-23 13:49:25,008 INFO L933 BasicCegarLoop]: 688 mSDtfsCounter, 366 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:25,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 1206 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:49:25,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46110 states. [2021-11-23 13:49:30,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46110 to 46108. [2021-11-23 13:49:30,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46108 states, 46107 states have (on average 1.1937232958119157) internal successors, (55039), 46107 states have internal predecessors, (55039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:30,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46108 states to 46108 states and 55039 transitions. [2021-11-23 13:49:30,150 INFO L78 Accepts]: Start accepts. Automaton has 46108 states and 55039 transitions. Word has length 125 [2021-11-23 13:49:30,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:30,150 INFO L470 AbstractCegarLoop]: Abstraction has 46108 states and 55039 transitions. [2021-11-23 13:49:30,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:30,151 INFO L276 IsEmpty]: Start isEmpty. Operand 46108 states and 55039 transitions. [2021-11-23 13:49:30,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 13:49:30,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:30,171 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:30,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-23 13:49:30,171 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:30,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:30,172 INFO L85 PathProgramCache]: Analyzing trace with hash 532505262, now seen corresponding path program 1 times [2021-11-23 13:49:30,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:30,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663622362] [2021-11-23 13:49:30,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:30,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:49:30,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:30,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663622362] [2021-11-23 13:49:30,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663622362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:49:30,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:49:30,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:49:30,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718977895] [2021-11-23 13:49:30,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:49:30,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:49:30,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:30,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:49:30,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:49:30,201 INFO L87 Difference]: Start difference. First operand 46108 states and 55039 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:35,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:35,228 INFO L93 Difference]: Finished difference Result 91854 states and 109680 transitions. [2021-11-23 13:49:35,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:49:35,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 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 125 [2021-11-23 13:49:35,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:35,304 INFO L225 Difference]: With dead ends: 91854 [2021-11-23 13:49:35,304 INFO L226 Difference]: Without dead ends: 45931 [2021-11-23 13:49:35,336 INFO L932 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 [2021-11-23 13:49:35,337 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 532 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:35,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 538 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:49:35,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45931 states. [2021-11-23 13:49:40,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45931 to 45931. [2021-11-23 13:49:40,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45931 states, 45930 states have (on average 1.1940779446984542) internal successors, (54844), 45930 states have internal predecessors, (54844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:40,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45931 states to 45931 states and 54844 transitions. [2021-11-23 13:49:40,664 INFO L78 Accepts]: Start accepts. Automaton has 45931 states and 54844 transitions. Word has length 125 [2021-11-23 13:49:40,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:40,664 INFO L470 AbstractCegarLoop]: Abstraction has 45931 states and 54844 transitions. [2021-11-23 13:49:40,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:40,664 INFO L276 IsEmpty]: Start isEmpty. Operand 45931 states and 54844 transitions. [2021-11-23 13:49:40,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-23 13:49:40,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:40,852 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:40,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-23 13:49:40,852 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:40,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:40,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1781218801, now seen corresponding path program 1 times [2021-11-23 13:49:40,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:40,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582273824] [2021-11-23 13:49:40,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:40,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:49:40,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:40,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582273824] [2021-11-23 13:49:40,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582273824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:49:40,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:49:40,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:49:40,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027566262] [2021-11-23 13:49:40,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:49:40,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:49:40,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:40,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:49:40,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:49:40,918 INFO L87 Difference]: Start difference. First operand 45931 states and 54844 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)