./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_srvr_12.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_7f70ac21-5d83-47f6-9f63-b16ec0ebba51/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_7f70ac21-5d83-47f6-9f63-b16ec0ebba51/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7f70ac21-5d83-47f6-9f63-b16ec0ebba51/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7f70ac21-5d83-47f6-9f63-b16ec0ebba51/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_srvr_12.cil.c -s /tmp/vcloud-vcloud-master/worker/run_dir_7f70ac21-5d83-47f6-9f63-b16ec0ebba51/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7f70ac21-5d83-47f6-9f63-b16ec0ebba51/bin/uautomizer --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 8822f5291178e45ba1da62c4d4636880280d6cc4 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 02:59:05,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:59:05,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:59:05,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:59:05,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:59:05,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:59:05,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:59:05,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:59:05,636 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:59:05,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:59:05,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:59:05,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:59:05,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:59:05,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:59:05,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:59:05,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:59:05,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:59:05,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:59:05,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:59:05,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:59:05,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:59:05,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:59:05,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:59:05,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:59:05,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:59:05,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:59:05,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:59:05,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:59:05,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:59:05,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:59:05,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:59:05,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:59:05,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:59:05,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:59:05,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:59:05,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:59:05,673 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:59:05,673 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:59:05,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:59:05,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:59:05,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:59:05,676 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7f70ac21-5d83-47f6-9f63-b16ec0ebba51/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 02:59:05,701 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:59:05,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:59:05,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:59:05,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:59:05,703 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:59:05,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:59:05,704 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 02:59:05,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:59:05,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 02:59:05,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:59:05,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 02:59:05,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 02:59:05,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 02:59:05,705 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 02:59:05,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 02:59:05,706 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:59:05,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 02:59:05,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:59:05,706 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:59:05,706 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 02:59:05,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 02:59:05,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:59:05,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:59:05,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 02:59:05,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 02:59:05,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:59:05,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 02:59:05,708 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 02:59:05,708 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:59:05,709 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-vcloud-master/worker/run_dir_7f70ac21-5d83-47f6-9f63-b16ec0ebba51/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_7f70ac21-5d83-47f6-9f63-b16ec0ebba51/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8822f5291178e45ba1da62c4d4636880280d6cc4 [2020-11-28 02:59:06,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:59:06,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:59:06,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:59:06,056 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:59:06,058 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:59:06,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7f70ac21-5d83-47f6-9f63-b16ec0ebba51/bin/uautomizer/../../sv-benchmarks/c/openssl-simplified/s3_srvr_12.cil.c [2020-11-28 02:59:06,141 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7f70ac21-5d83-47f6-9f63-b16ec0ebba51/bin/uautomizer/data/fc52ecb7f/c068e3fa15cd461e8fca45c240779ec5/FLAG194bc6be5 [2020-11-28 02:59:06,722 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:59:06,723 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7f70ac21-5d83-47f6-9f63-b16ec0ebba51/sv-benchmarks/c/openssl-simplified/s3_srvr_12.cil.c [2020-11-28 02:59:06,741 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7f70ac21-5d83-47f6-9f63-b16ec0ebba51/bin/uautomizer/data/fc52ecb7f/c068e3fa15cd461e8fca45c240779ec5/FLAG194bc6be5 [2020-11-28 02:59:07,031 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7f70ac21-5d83-47f6-9f63-b16ec0ebba51/bin/uautomizer/data/fc52ecb7f/c068e3fa15cd461e8fca45c240779ec5 [2020-11-28 02:59:07,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:59:07,035 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 02:59:07,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:59:07,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:59:07,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:59:07,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:59:07" (1/1) ... [2020-11-28 02:59:07,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1667619c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:07, skipping insertion in model container [2020-11-28 02:59:07,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:59:07" (1/1) ... [2020-11-28 02:59:07,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:59:07,136 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:59:07,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:59:07,511 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:59:07,599 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:59:07,617 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:59:07,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:07 WrapperNode [2020-11-28 02:59:07,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:59:07,619 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 02:59:07,619 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 02:59:07,619 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 02:59:07,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:07" (1/1) ... [2020-11-28 02:59:07,658 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:07" (1/1) ... [2020-11-28 02:59:07,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 02:59:07,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:59:07,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:59:07,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:59:07,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:07" (1/1) ... [2020-11-28 02:59:07,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:07" (1/1) ... [2020-11-28 02:59:07,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:07" (1/1) ... [2020-11-28 02:59:07,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:07" (1/1) ... [2020-11-28 02:59:07,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:07" (1/1) ... [2020-11-28 02:59:07,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:07" (1/1) ... [2020-11-28 02:59:07,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:07" (1/1) ... [2020-11-28 02:59:07,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:59:07,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:59:07,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:59:07,844 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:59:07,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7f70ac21-5d83-47f6-9f63-b16ec0ebba51/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:59:07,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 02:59:07,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 02:59:07,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:59:07,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:59:08,140 WARN L798 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-11-28 02:59:09,231 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-11-28 02:59:09,231 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-11-28 02:59:09,243 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:59:09,244 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 02:59:09,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:59:09 BoogieIcfgContainer [2020-11-28 02:59:09,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:59:09,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 02:59:09,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 02:59:09,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 02:59:09,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:59:07" (1/3) ... [2020-11-28 02:59:09,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d87a716 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:59:09, skipping insertion in model container [2020-11-28 02:59:09,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:07" (2/3) ... [2020-11-28 02:59:09,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d87a716 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:59:09, skipping insertion in model container [2020-11-28 02:59:09,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:59:09" (3/3) ... [2020-11-28 02:59:09,257 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_12.cil.c [2020-11-28 02:59:09,270 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 02:59:09,283 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 02:59:09,301 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 02:59:09,340 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 02:59:09,341 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 02:59:09,341 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 02:59:09,341 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:59:09,341 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:59:09,341 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 02:59:09,342 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:59:09,342 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 02:59:09,363 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states. [2020-11-28 02:59:09,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-28 02:59:09,370 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:09,371 INFO L422 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] [2020-11-28 02:59:09,371 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:09,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:09,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1659372905, now seen corresponding path program 1 times [2020-11-28 02:59:09,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:09,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075014502] [2020-11-28 02:59:09,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:59:09,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075014502] [2020-11-28 02:59:09,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:09,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:09,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945660129] [2020-11-28 02:59:09,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:09,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:09,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:09,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:09,674 INFO L87 Difference]: Start difference. First operand 168 states. Second operand 3 states. [2020-11-28 02:59:10,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:10,213 INFO L93 Difference]: Finished difference Result 354 states and 614 transitions. [2020-11-28 02:59:10,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:10,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-11-28 02:59:10,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:10,226 INFO L225 Difference]: With dead ends: 354 [2020-11-28 02:59:10,227 INFO L226 Difference]: Without dead ends: 174 [2020-11-28 02:59:10,230 INFO L677 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 [2020-11-28 02:59:10,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-11-28 02:59:10,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2020-11-28 02:59:10,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-11-28 02:59:10,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 277 transitions. [2020-11-28 02:59:10,290 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 277 transitions. Word has length 28 [2020-11-28 02:59:10,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:10,291 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 277 transitions. [2020-11-28 02:59:10,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:10,291 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 277 transitions. [2020-11-28 02:59:10,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-28 02:59:10,293 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:10,294 INFO L422 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] [2020-11-28 02:59:10,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 02:59:10,294 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:10,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:10,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1067837001, now seen corresponding path program 1 times [2020-11-28 02:59:10,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:10,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275518685] [2020-11-28 02:59:10,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:59:10,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275518685] [2020-11-28 02:59:10,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:10,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:10,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104224909] [2020-11-28 02:59:10,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:10,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:10,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:10,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:10,377 INFO L87 Difference]: Start difference. First operand 172 states and 277 transitions. Second operand 3 states. [2020-11-28 02:59:10,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:10,619 INFO L93 Difference]: Finished difference Result 358 states and 575 transitions. [2020-11-28 02:59:10,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:10,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-11-28 02:59:10,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:10,624 INFO L225 Difference]: With dead ends: 358 [2020-11-28 02:59:10,624 INFO L226 Difference]: Without dead ends: 194 [2020-11-28 02:59:10,626 INFO L677 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 [2020-11-28 02:59:10,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-11-28 02:59:10,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2020-11-28 02:59:10,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-11-28 02:59:10,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 307 transitions. [2020-11-28 02:59:10,670 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 307 transitions. Word has length 29 [2020-11-28 02:59:10,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:10,672 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 307 transitions. [2020-11-28 02:59:10,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:10,672 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 307 transitions. [2020-11-28 02:59:10,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-28 02:59:10,678 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:10,679 INFO L422 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] [2020-11-28 02:59:10,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 02:59:10,680 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:10,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:10,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1369735938, now seen corresponding path program 1 times [2020-11-28 02:59:10,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:10,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56240160] [2020-11-28 02:59:10,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:59:10,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56240160] [2020-11-28 02:59:10,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:10,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:10,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711650891] [2020-11-28 02:59:10,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:10,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:10,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:10,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:10,825 INFO L87 Difference]: Start difference. First operand 194 states and 307 transitions. Second operand 3 states. [2020-11-28 02:59:11,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:11,067 INFO L93 Difference]: Finished difference Result 388 states and 616 transitions. [2020-11-28 02:59:11,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:11,068 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-11-28 02:59:11,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:11,071 INFO L225 Difference]: With dead ends: 388 [2020-11-28 02:59:11,071 INFO L226 Difference]: Without dead ends: 202 [2020-11-28 02:59:11,072 INFO L677 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 [2020-11-28 02:59:11,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-11-28 02:59:11,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2020-11-28 02:59:11,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-11-28 02:59:11,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 318 transitions. [2020-11-28 02:59:11,108 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 318 transitions. Word has length 29 [2020-11-28 02:59:11,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:11,108 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 318 transitions. [2020-11-28 02:59:11,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:11,110 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 318 transitions. [2020-11-28 02:59:11,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-28 02:59:11,113 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:11,114 INFO L422 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] [2020-11-28 02:59:11,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 02:59:11,114 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:11,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:11,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1614302654, now seen corresponding path program 1 times [2020-11-28 02:59:11,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:11,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866207902] [2020-11-28 02:59:11,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:59:11,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866207902] [2020-11-28 02:59:11,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:11,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:11,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116335814] [2020-11-28 02:59:11,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:11,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:11,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:11,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:11,234 INFO L87 Difference]: Start difference. First operand 200 states and 318 transitions. Second operand 3 states. [2020-11-28 02:59:11,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:11,469 INFO L93 Difference]: Finished difference Result 393 states and 626 transitions. [2020-11-28 02:59:11,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:11,470 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-11-28 02:59:11,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:11,472 INFO L225 Difference]: With dead ends: 393 [2020-11-28 02:59:11,473 INFO L226 Difference]: Without dead ends: 201 [2020-11-28 02:59:11,474 INFO L677 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 [2020-11-28 02:59:11,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-11-28 02:59:11,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2020-11-28 02:59:11,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-11-28 02:59:11,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 319 transitions. [2020-11-28 02:59:11,506 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 319 transitions. Word has length 29 [2020-11-28 02:59:11,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:11,507 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 319 transitions. [2020-11-28 02:59:11,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:11,507 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 319 transitions. [2020-11-28 02:59:11,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-28 02:59:11,508 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:11,508 INFO L422 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] [2020-11-28 02:59:11,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 02:59:11,509 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:11,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:11,510 INFO L82 PathProgramCache]: Analyzing trace with hash -210698213, now seen corresponding path program 1 times [2020-11-28 02:59:11,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:11,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102666309] [2020-11-28 02:59:11,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:59:11,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102666309] [2020-11-28 02:59:11,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:11,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:11,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100632246] [2020-11-28 02:59:11,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:11,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:11,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:11,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:11,578 INFO L87 Difference]: Start difference. First operand 201 states and 319 transitions. Second operand 3 states. [2020-11-28 02:59:11,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:11,769 INFO L93 Difference]: Finished difference Result 404 states and 638 transitions. [2020-11-28 02:59:11,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:11,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-11-28 02:59:11,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:11,772 INFO L225 Difference]: With dead ends: 404 [2020-11-28 02:59:11,773 INFO L226 Difference]: Without dead ends: 211 [2020-11-28 02:59:11,774 INFO L677 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 [2020-11-28 02:59:11,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-11-28 02:59:11,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 201. [2020-11-28 02:59:11,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-11-28 02:59:11,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 317 transitions. [2020-11-28 02:59:11,790 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 317 transitions. Word has length 30 [2020-11-28 02:59:11,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:11,790 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 317 transitions. [2020-11-28 02:59:11,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:11,791 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 317 transitions. [2020-11-28 02:59:11,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 02:59:11,792 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:11,792 INFO L422 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] [2020-11-28 02:59:11,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 02:59:11,793 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:11,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:11,794 INFO L82 PathProgramCache]: Analyzing trace with hash -852120702, now seen corresponding path program 1 times [2020-11-28 02:59:11,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:11,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075038716] [2020-11-28 02:59:11,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:59:11,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075038716] [2020-11-28 02:59:11,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:11,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:11,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651801393] [2020-11-28 02:59:11,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:11,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:11,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:11,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:11,865 INFO L87 Difference]: Start difference. First operand 201 states and 317 transitions. Second operand 3 states. [2020-11-28 02:59:12,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:12,074 INFO L93 Difference]: Finished difference Result 404 states and 634 transitions. [2020-11-28 02:59:12,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:12,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-11-28 02:59:12,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:12,077 INFO L225 Difference]: With dead ends: 404 [2020-11-28 02:59:12,077 INFO L226 Difference]: Without dead ends: 211 [2020-11-28 02:59:12,078 INFO L677 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 [2020-11-28 02:59:12,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-11-28 02:59:12,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 201. [2020-11-28 02:59:12,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-11-28 02:59:12,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 315 transitions. [2020-11-28 02:59:12,099 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 315 transitions. Word has length 31 [2020-11-28 02:59:12,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:12,099 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 315 transitions. [2020-11-28 02:59:12,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:12,100 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 315 transitions. [2020-11-28 02:59:12,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-28 02:59:12,105 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:12,106 INFO L422 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] [2020-11-28 02:59:12,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 02:59:12,107 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:12,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:12,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1795373184, now seen corresponding path program 1 times [2020-11-28 02:59:12,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:12,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083338945] [2020-11-28 02:59:12,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:59:12,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083338945] [2020-11-28 02:59:12,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:12,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:12,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602536179] [2020-11-28 02:59:12,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:12,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:12,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:12,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:12,193 INFO L87 Difference]: Start difference. First operand 201 states and 315 transitions. Second operand 3 states. [2020-11-28 02:59:12,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:12,385 INFO L93 Difference]: Finished difference Result 404 states and 630 transitions. [2020-11-28 02:59:12,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:12,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-11-28 02:59:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:12,387 INFO L225 Difference]: With dead ends: 404 [2020-11-28 02:59:12,387 INFO L226 Difference]: Without dead ends: 211 [2020-11-28 02:59:12,388 INFO L677 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 [2020-11-28 02:59:12,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-11-28 02:59:12,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 201. [2020-11-28 02:59:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-11-28 02:59:12,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 313 transitions. [2020-11-28 02:59:12,397 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 313 transitions. Word has length 32 [2020-11-28 02:59:12,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:12,398 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 313 transitions. [2020-11-28 02:59:12,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:12,398 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 313 transitions. [2020-11-28 02:59:12,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-28 02:59:12,399 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:12,399 INFO L422 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] [2020-11-28 02:59:12,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 02:59:12,399 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:12,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:12,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1439838815, now seen corresponding path program 1 times [2020-11-28 02:59:12,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:12,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707062291] [2020-11-28 02:59:12,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:59:12,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707062291] [2020-11-28 02:59:12,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:12,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:59:12,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630435395] [2020-11-28 02:59:12,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:59:12,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:12,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:59:12,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:59:12,481 INFO L87 Difference]: Start difference. First operand 201 states and 313 transitions. Second operand 4 states. [2020-11-28 02:59:12,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:12,850 INFO L93 Difference]: Finished difference Result 600 states and 930 transitions. [2020-11-28 02:59:12,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:59:12,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-11-28 02:59:12,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:12,854 INFO L225 Difference]: With dead ends: 600 [2020-11-28 02:59:12,854 INFO L226 Difference]: Without dead ends: 407 [2020-11-28 02:59:12,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:59:12,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-11-28 02:59:12,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 383. [2020-11-28 02:59:12,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-11-28 02:59:12,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 595 transitions. [2020-11-28 02:59:12,879 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 595 transitions. Word has length 32 [2020-11-28 02:59:12,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:12,880 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 595 transitions. [2020-11-28 02:59:12,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:59:12,880 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 595 transitions. [2020-11-28 02:59:12,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-28 02:59:12,881 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:12,881 INFO L422 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] [2020-11-28 02:59:12,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 02:59:12,882 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:12,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:12,882 INFO L82 PathProgramCache]: Analyzing trace with hash -443745160, now seen corresponding path program 1 times [2020-11-28 02:59:12,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:12,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808631776] [2020-11-28 02:59:12,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:59:12,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808631776] [2020-11-28 02:59:12,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:12,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:12,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464684346] [2020-11-28 02:59:12,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:12,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:12,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:12,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:12,968 INFO L87 Difference]: Start difference. First operand 383 states and 595 transitions. Second operand 3 states. [2020-11-28 02:59:13,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:13,260 INFO L93 Difference]: Finished difference Result 842 states and 1324 transitions. [2020-11-28 02:59:13,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:13,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-11-28 02:59:13,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:13,266 INFO L225 Difference]: With dead ends: 842 [2020-11-28 02:59:13,266 INFO L226 Difference]: Without dead ends: 467 [2020-11-28 02:59:13,267 INFO L677 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 [2020-11-28 02:59:13,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-11-28 02:59:13,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 449. [2020-11-28 02:59:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2020-11-28 02:59:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 710 transitions. [2020-11-28 02:59:13,298 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 710 transitions. Word has length 44 [2020-11-28 02:59:13,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:13,301 INFO L481 AbstractCegarLoop]: Abstraction has 449 states and 710 transitions. [2020-11-28 02:59:13,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:13,301 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 710 transitions. [2020-11-28 02:59:13,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-28 02:59:13,302 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:13,302 INFO L422 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] [2020-11-28 02:59:13,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 02:59:13,303 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:13,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:13,305 INFO L82 PathProgramCache]: Analyzing trace with hash 974176282, now seen corresponding path program 1 times [2020-11-28 02:59:13,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:13,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009728852] [2020-11-28 02:59:13,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:59:13,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009728852] [2020-11-28 02:59:13,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:13,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:13,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267865820] [2020-11-28 02:59:13,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:13,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:13,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:13,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:13,389 INFO L87 Difference]: Start difference. First operand 449 states and 710 transitions. Second operand 3 states. [2020-11-28 02:59:13,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:13,678 INFO L93 Difference]: Finished difference Result 931 states and 1482 transitions. [2020-11-28 02:59:13,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:13,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-11-28 02:59:13,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:13,682 INFO L225 Difference]: With dead ends: 931 [2020-11-28 02:59:13,682 INFO L226 Difference]: Without dead ends: 490 [2020-11-28 02:59:13,683 INFO L677 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 [2020-11-28 02:59:13,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-11-28 02:59:13,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 472. [2020-11-28 02:59:13,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2020-11-28 02:59:13,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 753 transitions. [2020-11-28 02:59:13,710 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 753 transitions. Word has length 45 [2020-11-28 02:59:13,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:13,710 INFO L481 AbstractCegarLoop]: Abstraction has 472 states and 753 transitions. [2020-11-28 02:59:13,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:13,710 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 753 transitions. [2020-11-28 02:59:13,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-28 02:59:13,712 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:13,712 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:13,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 02:59:13,712 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:13,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:13,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1540899075, now seen corresponding path program 1 times [2020-11-28 02:59:13,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:13,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505923942] [2020-11-28 02:59:13,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 02:59:13,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505923942] [2020-11-28 02:59:13,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:13,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:13,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210346271] [2020-11-28 02:59:13,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:13,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:13,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:13,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:13,814 INFO L87 Difference]: Start difference. First operand 472 states and 753 transitions. Second operand 3 states. [2020-11-28 02:59:14,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:14,069 INFO L93 Difference]: Finished difference Result 988 states and 1578 transitions. [2020-11-28 02:59:14,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:14,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-11-28 02:59:14,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:14,074 INFO L225 Difference]: With dead ends: 988 [2020-11-28 02:59:14,075 INFO L226 Difference]: Without dead ends: 524 [2020-11-28 02:59:14,076 INFO L677 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 [2020-11-28 02:59:14,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-11-28 02:59:14,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 506. [2020-11-28 02:59:14,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-11-28 02:59:14,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 804 transitions. [2020-11-28 02:59:14,104 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 804 transitions. Word has length 56 [2020-11-28 02:59:14,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:14,105 INFO L481 AbstractCegarLoop]: Abstraction has 506 states and 804 transitions. [2020-11-28 02:59:14,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:14,105 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 804 transitions. [2020-11-28 02:59:14,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-28 02:59:14,107 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:14,107 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:14,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 02:59:14,107 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:14,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:14,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1188180310, now seen corresponding path program 1 times [2020-11-28 02:59:14,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:14,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361700297] [2020-11-28 02:59:14,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:14,165 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 02:59:14,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361700297] [2020-11-28 02:59:14,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:14,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:14,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017374339] [2020-11-28 02:59:14,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:14,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:14,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:14,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:14,167 INFO L87 Difference]: Start difference. First operand 506 states and 804 transitions. Second operand 3 states. [2020-11-28 02:59:14,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:14,434 INFO L93 Difference]: Finished difference Result 1022 states and 1626 transitions. [2020-11-28 02:59:14,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:14,435 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-11-28 02:59:14,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:14,439 INFO L225 Difference]: With dead ends: 1022 [2020-11-28 02:59:14,439 INFO L226 Difference]: Without dead ends: 524 [2020-11-28 02:59:14,441 INFO L677 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 [2020-11-28 02:59:14,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-11-28 02:59:14,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 506. [2020-11-28 02:59:14,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-11-28 02:59:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 801 transitions. [2020-11-28 02:59:14,471 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 801 transitions. Word has length 57 [2020-11-28 02:59:14,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:14,471 INFO L481 AbstractCegarLoop]: Abstraction has 506 states and 801 transitions. [2020-11-28 02:59:14,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:14,471 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 801 transitions. [2020-11-28 02:59:14,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-28 02:59:14,473 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:14,473 INFO L422 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] [2020-11-28 02:59:14,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-28 02:59:14,473 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:14,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:14,474 INFO L82 PathProgramCache]: Analyzing trace with hash -2067348000, now seen corresponding path program 1 times [2020-11-28 02:59:14,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:14,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314504983] [2020-11-28 02:59:14,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 02:59:14,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314504983] [2020-11-28 02:59:14,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:14,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:14,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882591431] [2020-11-28 02:59:14,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:14,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:14,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:14,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:14,525 INFO L87 Difference]: Start difference. First operand 506 states and 801 transitions. Second operand 3 states. [2020-11-28 02:59:14,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:14,796 INFO L93 Difference]: Finished difference Result 1069 states and 1697 transitions. [2020-11-28 02:59:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:14,796 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-11-28 02:59:14,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:14,801 INFO L225 Difference]: With dead ends: 1069 [2020-11-28 02:59:14,801 INFO L226 Difference]: Without dead ends: 571 [2020-11-28 02:59:14,802 INFO L677 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 [2020-11-28 02:59:14,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-11-28 02:59:14,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 569. [2020-11-28 02:59:14,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2020-11-28 02:59:14,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 898 transitions. [2020-11-28 02:59:14,838 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 898 transitions. Word has length 57 [2020-11-28 02:59:14,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:14,839 INFO L481 AbstractCegarLoop]: Abstraction has 569 states and 898 transitions. [2020-11-28 02:59:14,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:14,839 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 898 transitions. [2020-11-28 02:59:14,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-28 02:59:14,841 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:14,841 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:14,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-28 02:59:14,841 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:14,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:14,842 INFO L82 PathProgramCache]: Analyzing trace with hash -583256949, now seen corresponding path program 1 times [2020-11-28 02:59:14,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:14,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304546003] [2020-11-28 02:59:14,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:59:14,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304546003] [2020-11-28 02:59:14,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:14,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:14,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036249030] [2020-11-28 02:59:14,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:14,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:14,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:14,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:14,928 INFO L87 Difference]: Start difference. First operand 569 states and 898 transitions. Second operand 3 states. [2020-11-28 02:59:15,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:15,216 INFO L93 Difference]: Finished difference Result 1179 states and 1859 transitions. [2020-11-28 02:59:15,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:15,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-11-28 02:59:15,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:15,222 INFO L225 Difference]: With dead ends: 1179 [2020-11-28 02:59:15,222 INFO L226 Difference]: Without dead ends: 618 [2020-11-28 02:59:15,223 INFO L677 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 [2020-11-28 02:59:15,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-11-28 02:59:15,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 612. [2020-11-28 02:59:15,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2020-11-28 02:59:15,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 962 transitions. [2020-11-28 02:59:15,258 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 962 transitions. Word has length 79 [2020-11-28 02:59:15,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:15,258 INFO L481 AbstractCegarLoop]: Abstraction has 612 states and 962 transitions. [2020-11-28 02:59:15,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:15,258 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 962 transitions. [2020-11-28 02:59:15,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-11-28 02:59:15,263 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:15,264 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:15,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-28 02:59:15,264 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:15,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:15,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1357251849, now seen corresponding path program 1 times [2020-11-28 02:59:15,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:15,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304256556] [2020-11-28 02:59:15,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:59:15,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304256556] [2020-11-28 02:59:15,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:15,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:15,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123346816] [2020-11-28 02:59:15,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:15,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:15,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:15,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:15,324 INFO L87 Difference]: Start difference. First operand 612 states and 962 transitions. Second operand 3 states. [2020-11-28 02:59:15,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:15,626 INFO L93 Difference]: Finished difference Result 1222 states and 1920 transitions. [2020-11-28 02:59:15,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:15,627 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-11-28 02:59:15,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:15,631 INFO L225 Difference]: With dead ends: 1222 [2020-11-28 02:59:15,631 INFO L226 Difference]: Without dead ends: 618 [2020-11-28 02:59:15,634 INFO L677 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 [2020-11-28 02:59:15,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-11-28 02:59:15,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 612. [2020-11-28 02:59:15,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2020-11-28 02:59:15,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 959 transitions. [2020-11-28 02:59:15,665 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 959 transitions. Word has length 80 [2020-11-28 02:59:15,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:15,666 INFO L481 AbstractCegarLoop]: Abstraction has 612 states and 959 transitions. [2020-11-28 02:59:15,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:15,666 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 959 transitions. [2020-11-28 02:59:15,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-28 02:59:15,668 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:15,668 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:15,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-28 02:59:15,668 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:15,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:15,669 INFO L82 PathProgramCache]: Analyzing trace with hash 2054627548, now seen corresponding path program 1 times [2020-11-28 02:59:15,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:15,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281296403] [2020-11-28 02:59:15,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-28 02:59:15,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281296403] [2020-11-28 02:59:15,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:15,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:15,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783709576] [2020-11-28 02:59:15,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:15,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:15,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:15,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:15,712 INFO L87 Difference]: Start difference. First operand 612 states and 959 transitions. Second operand 3 states. [2020-11-28 02:59:15,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:15,987 INFO L93 Difference]: Finished difference Result 1218 states and 1908 transitions. [2020-11-28 02:59:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:15,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2020-11-28 02:59:15,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:15,993 INFO L225 Difference]: With dead ends: 1218 [2020-11-28 02:59:15,993 INFO L226 Difference]: Without dead ends: 614 [2020-11-28 02:59:15,994 INFO L677 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 [2020-11-28 02:59:15,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2020-11-28 02:59:16,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 612. [2020-11-28 02:59:16,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2020-11-28 02:59:16,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 954 transitions. [2020-11-28 02:59:16,030 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 954 transitions. Word has length 85 [2020-11-28 02:59:16,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:16,031 INFO L481 AbstractCegarLoop]: Abstraction has 612 states and 954 transitions. [2020-11-28 02:59:16,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:16,031 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 954 transitions. [2020-11-28 02:59:16,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-11-28 02:59:16,033 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:16,033 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:16,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-28 02:59:16,034 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:16,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:16,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1047765588, now seen corresponding path program 1 times [2020-11-28 02:59:16,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:16,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504829452] [2020-11-28 02:59:16,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-28 02:59:16,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504829452] [2020-11-28 02:59:16,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:16,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:16,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943492802] [2020-11-28 02:59:16,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:16,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:16,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:16,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:16,085 INFO L87 Difference]: Start difference. First operand 612 states and 954 transitions. Second operand 3 states. [2020-11-28 02:59:16,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:16,329 INFO L93 Difference]: Finished difference Result 1276 states and 1991 transitions. [2020-11-28 02:59:16,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:16,329 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-11-28 02:59:16,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:16,334 INFO L225 Difference]: With dead ends: 1276 [2020-11-28 02:59:16,334 INFO L226 Difference]: Without dead ends: 672 [2020-11-28 02:59:16,337 INFO L677 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 [2020-11-28 02:59:16,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2020-11-28 02:59:16,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 644. [2020-11-28 02:59:16,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2020-11-28 02:59:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 997 transitions. [2020-11-28 02:59:16,375 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 997 transitions. Word has length 93 [2020-11-28 02:59:16,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:16,376 INFO L481 AbstractCegarLoop]: Abstraction has 644 states and 997 transitions. [2020-11-28 02:59:16,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:16,376 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 997 transitions. [2020-11-28 02:59:16,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-11-28 02:59:16,378 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:16,378 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-11-28 02:59:16,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-28 02:59:16,379 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:16,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:16,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1111400187, now seen corresponding path program 1 times [2020-11-28 02:59:16,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:16,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306219142] [2020-11-28 02:59:16,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-28 02:59:16,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306219142] [2020-11-28 02:59:16,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:16,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:16,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634289646] [2020-11-28 02:59:16,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:16,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:16,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:16,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:16,446 INFO L87 Difference]: Start difference. First operand 644 states and 997 transitions. Second operand 3 states. [2020-11-28 02:59:16,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:16,696 INFO L93 Difference]: Finished difference Result 1308 states and 2028 transitions. [2020-11-28 02:59:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:16,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-11-28 02:59:16,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:16,701 INFO L225 Difference]: With dead ends: 1308 [2020-11-28 02:59:16,702 INFO L226 Difference]: Without dead ends: 672 [2020-11-28 02:59:16,703 INFO L677 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 [2020-11-28 02:59:16,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2020-11-28 02:59:16,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 644. [2020-11-28 02:59:16,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2020-11-28 02:59:16,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 991 transitions. [2020-11-28 02:59:16,743 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 991 transitions. Word has length 94 [2020-11-28 02:59:16,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:16,744 INFO L481 AbstractCegarLoop]: Abstraction has 644 states and 991 transitions. [2020-11-28 02:59:16,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:16,744 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 991 transitions. [2020-11-28 02:59:16,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-11-28 02:59:16,746 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:16,746 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:16,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-28 02:59:16,747 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:16,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:16,748 INFO L82 PathProgramCache]: Analyzing trace with hash -51700436, now seen corresponding path program 1 times [2020-11-28 02:59:16,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:16,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890254176] [2020-11-28 02:59:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-28 02:59:16,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890254176] [2020-11-28 02:59:16,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:16,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:16,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109897517] [2020-11-28 02:59:16,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:16,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:16,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:16,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:16,807 INFO L87 Difference]: Start difference. First operand 644 states and 991 transitions. Second operand 3 states. [2020-11-28 02:59:17,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:17,132 INFO L93 Difference]: Finished difference Result 1344 states and 2068 transitions. [2020-11-28 02:59:17,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:17,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-11-28 02:59:17,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:17,138 INFO L225 Difference]: With dead ends: 1344 [2020-11-28 02:59:17,138 INFO L226 Difference]: Without dead ends: 708 [2020-11-28 02:59:17,140 INFO L677 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 [2020-11-28 02:59:17,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2020-11-28 02:59:17,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 696. [2020-11-28 02:59:17,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2020-11-28 02:59:17,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1067 transitions. [2020-11-28 02:59:17,178 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1067 transitions. Word has length 100 [2020-11-28 02:59:17,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:17,179 INFO L481 AbstractCegarLoop]: Abstraction has 696 states and 1067 transitions. [2020-11-28 02:59:17,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:17,179 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1067 transitions. [2020-11-28 02:59:17,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-28 02:59:17,181 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:17,181 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:17,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-28 02:59:17,182 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:17,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:17,182 INFO L82 PathProgramCache]: Analyzing trace with hash -530812530, now seen corresponding path program 1 times [2020-11-28 02:59:17,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:17,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765664367] [2020-11-28 02:59:17,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-28 02:59:17,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765664367] [2020-11-28 02:59:17,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:17,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:17,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813229909] [2020-11-28 02:59:17,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:17,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:17,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:17,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:17,253 INFO L87 Difference]: Start difference. First operand 696 states and 1067 transitions. Second operand 3 states. [2020-11-28 02:59:17,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:17,554 INFO L93 Difference]: Finished difference Result 1401 states and 2150 transitions. [2020-11-28 02:59:17,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:17,555 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2020-11-28 02:59:17,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:17,560 INFO L225 Difference]: With dead ends: 1401 [2020-11-28 02:59:17,560 INFO L226 Difference]: Without dead ends: 709 [2020-11-28 02:59:17,563 INFO L677 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 [2020-11-28 02:59:17,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2020-11-28 02:59:17,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 697. [2020-11-28 02:59:17,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-11-28 02:59:17,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1068 transitions. [2020-11-28 02:59:17,623 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1068 transitions. Word has length 101 [2020-11-28 02:59:17,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:17,624 INFO L481 AbstractCegarLoop]: Abstraction has 697 states and 1068 transitions. [2020-11-28 02:59:17,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:17,624 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1068 transitions. [2020-11-28 02:59:17,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-11-28 02:59:17,626 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:17,627 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-11-28 02:59:17,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-28 02:59:17,627 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:17,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:17,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1306174224, now seen corresponding path program 1 times [2020-11-28 02:59:17,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:17,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856573960] [2020-11-28 02:59:17,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-11-28 02:59:17,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856573960] [2020-11-28 02:59:17,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:17,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:17,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579281413] [2020-11-28 02:59:17,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:17,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:17,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:17,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:17,695 INFO L87 Difference]: Start difference. First operand 697 states and 1068 transitions. Second operand 3 states. [2020-11-28 02:59:17,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:17,974 INFO L93 Difference]: Finished difference Result 1433 states and 2192 transitions. [2020-11-28 02:59:17,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:17,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-11-28 02:59:17,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:17,980 INFO L225 Difference]: With dead ends: 1433 [2020-11-28 02:59:17,980 INFO L226 Difference]: Without dead ends: 744 [2020-11-28 02:59:17,982 INFO L677 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 [2020-11-28 02:59:17,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-11-28 02:59:18,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 738. [2020-11-28 02:59:18,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2020-11-28 02:59:18,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1123 transitions. [2020-11-28 02:59:18,028 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1123 transitions. Word has length 112 [2020-11-28 02:59:18,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:18,028 INFO L481 AbstractCegarLoop]: Abstraction has 738 states and 1123 transitions. [2020-11-28 02:59:18,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1123 transitions. [2020-11-28 02:59:18,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-11-28 02:59:18,031 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:18,031 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:18,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-28 02:59:18,032 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:18,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:18,032 INFO L82 PathProgramCache]: Analyzing trace with hash -142977294, now seen corresponding path program 1 times [2020-11-28 02:59:18,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:18,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025766750] [2020-11-28 02:59:18,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:18,081 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-11-28 02:59:18,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025766750] [2020-11-28 02:59:18,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:18,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:18,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395545666] [2020-11-28 02:59:18,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:18,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:18,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:18,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:18,084 INFO L87 Difference]: Start difference. First operand 738 states and 1123 transitions. Second operand 3 states. [2020-11-28 02:59:18,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:18,375 INFO L93 Difference]: Finished difference Result 1474 states and 2242 transitions. [2020-11-28 02:59:18,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:18,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-11-28 02:59:18,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:18,381 INFO L225 Difference]: With dead ends: 1474 [2020-11-28 02:59:18,381 INFO L226 Difference]: Without dead ends: 744 [2020-11-28 02:59:18,383 INFO L677 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 [2020-11-28 02:59:18,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-11-28 02:59:18,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 738. [2020-11-28 02:59:18,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2020-11-28 02:59:18,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1118 transitions. [2020-11-28 02:59:18,432 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1118 transitions. Word has length 113 [2020-11-28 02:59:18,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:18,432 INFO L481 AbstractCegarLoop]: Abstraction has 738 states and 1118 transitions. [2020-11-28 02:59:18,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:18,432 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1118 transitions. [2020-11-28 02:59:18,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-28 02:59:18,435 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:18,435 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2020-11-28 02:59:18,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-28 02:59:18,435 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:18,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:18,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1809562376, now seen corresponding path program 1 times [2020-11-28 02:59:18,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:18,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808141238] [2020-11-28 02:59:18,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-11-28 02:59:18,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808141238] [2020-11-28 02:59:18,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:18,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:18,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849549474] [2020-11-28 02:59:18,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:18,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:18,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:18,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:18,486 INFO L87 Difference]: Start difference. First operand 738 states and 1118 transitions. Second operand 3 states. [2020-11-28 02:59:18,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:18,704 INFO L93 Difference]: Finished difference Result 1510 states and 2285 transitions. [2020-11-28 02:59:18,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:18,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2020-11-28 02:59:18,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:18,710 INFO L225 Difference]: With dead ends: 1510 [2020-11-28 02:59:18,710 INFO L226 Difference]: Without dead ends: 780 [2020-11-28 02:59:18,712 INFO L677 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 [2020-11-28 02:59:18,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2020-11-28 02:59:18,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 770. [2020-11-28 02:59:18,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2020-11-28 02:59:18,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1156 transitions. [2020-11-28 02:59:18,778 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1156 transitions. Word has length 115 [2020-11-28 02:59:18,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:18,779 INFO L481 AbstractCegarLoop]: Abstraction has 770 states and 1156 transitions. [2020-11-28 02:59:18,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:18,779 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1156 transitions. [2020-11-28 02:59:18,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-28 02:59:18,781 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:18,782 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2020-11-28 02:59:18,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-28 02:59:18,782 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:18,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:18,783 INFO L82 PathProgramCache]: Analyzing trace with hash 172042817, now seen corresponding path program 1 times [2020-11-28 02:59:18,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:18,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311050474] [2020-11-28 02:59:18,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-11-28 02:59:18,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311050474] [2020-11-28 02:59:18,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:18,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:18,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750722725] [2020-11-28 02:59:18,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:18,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:18,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:18,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:18,839 INFO L87 Difference]: Start difference. First operand 770 states and 1156 transitions. Second operand 3 states. [2020-11-28 02:59:19,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:19,087 INFO L93 Difference]: Finished difference Result 1542 states and 2314 transitions. [2020-11-28 02:59:19,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:19,087 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2020-11-28 02:59:19,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:19,093 INFO L225 Difference]: With dead ends: 1542 [2020-11-28 02:59:19,093 INFO L226 Difference]: Without dead ends: 780 [2020-11-28 02:59:19,095 INFO L677 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 [2020-11-28 02:59:19,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2020-11-28 02:59:19,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 770. [2020-11-28 02:59:19,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2020-11-28 02:59:19,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1147 transitions. [2020-11-28 02:59:19,140 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1147 transitions. Word has length 116 [2020-11-28 02:59:19,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:19,140 INFO L481 AbstractCegarLoop]: Abstraction has 770 states and 1147 transitions. [2020-11-28 02:59:19,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:19,141 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1147 transitions. [2020-11-28 02:59:19,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-11-28 02:59:19,143 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:19,144 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 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] [2020-11-28 02:59:19,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-28 02:59:19,144 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:19,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:19,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1961382768, now seen corresponding path program 1 times [2020-11-28 02:59:19,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:19,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687048672] [2020-11-28 02:59:19,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-11-28 02:59:19,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687048672] [2020-11-28 02:59:19,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:19,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:19,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693434701] [2020-11-28 02:59:19,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:19,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:19,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:19,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:19,217 INFO L87 Difference]: Start difference. First operand 770 states and 1147 transitions. Second operand 3 states. [2020-11-28 02:59:19,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:19,444 INFO L93 Difference]: Finished difference Result 1568 states and 2335 transitions. [2020-11-28 02:59:19,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:19,444 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2020-11-28 02:59:19,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:19,450 INFO L225 Difference]: With dead ends: 1568 [2020-11-28 02:59:19,450 INFO L226 Difference]: Without dead ends: 806 [2020-11-28 02:59:19,452 INFO L677 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 [2020-11-28 02:59:19,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2020-11-28 02:59:19,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 798. [2020-11-28 02:59:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 798 states. [2020-11-28 02:59:19,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1178 transitions. [2020-11-28 02:59:19,499 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1178 transitions. Word has length 137 [2020-11-28 02:59:19,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:19,499 INFO L481 AbstractCegarLoop]: Abstraction has 798 states and 1178 transitions. [2020-11-28 02:59:19,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:19,499 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1178 transitions. [2020-11-28 02:59:19,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-11-28 02:59:19,502 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:19,503 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2020-11-28 02:59:19,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-28 02:59:19,503 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:19,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:19,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1483046825, now seen corresponding path program 1 times [2020-11-28 02:59:19,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:19,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565245263] [2020-11-28 02:59:19,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:19,561 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-11-28 02:59:19,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565245263] [2020-11-28 02:59:19,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:19,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:19,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296206655] [2020-11-28 02:59:19,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:19,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:19,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:19,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:19,565 INFO L87 Difference]: Start difference. First operand 798 states and 1178 transitions. Second operand 3 states. [2020-11-28 02:59:19,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:19,809 INFO L93 Difference]: Finished difference Result 1596 states and 2356 transitions. [2020-11-28 02:59:19,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:19,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-11-28 02:59:19,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:19,814 INFO L225 Difference]: With dead ends: 1596 [2020-11-28 02:59:19,814 INFO L226 Difference]: Without dead ends: 806 [2020-11-28 02:59:19,816 INFO L677 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 [2020-11-28 02:59:19,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2020-11-28 02:59:19,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 798. [2020-11-28 02:59:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 798 states. [2020-11-28 02:59:19,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1168 transitions. [2020-11-28 02:59:19,862 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1168 transitions. Word has length 138 [2020-11-28 02:59:19,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:19,862 INFO L481 AbstractCegarLoop]: Abstraction has 798 states and 1168 transitions. [2020-11-28 02:59:19,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:19,863 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1168 transitions. [2020-11-28 02:59:19,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-28 02:59:19,865 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:19,866 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:19,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-28 02:59:19,866 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:19,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:19,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1313212300, now seen corresponding path program 1 times [2020-11-28 02:59:19,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:19,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340206199] [2020-11-28 02:59:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-11-28 02:59:19,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340206199] [2020-11-28 02:59:19,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:19,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:19,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722961671] [2020-11-28 02:59:19,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:19,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:19,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:19,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:19,922 INFO L87 Difference]: Start difference. First operand 798 states and 1168 transitions. Second operand 3 states. [2020-11-28 02:59:20,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:20,164 INFO L93 Difference]: Finished difference Result 1651 states and 2410 transitions. [2020-11-28 02:59:20,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:20,164 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 141 [2020-11-28 02:59:20,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:20,169 INFO L225 Difference]: With dead ends: 1651 [2020-11-28 02:59:20,169 INFO L226 Difference]: Without dead ends: 861 [2020-11-28 02:59:20,171 INFO L677 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 [2020-11-28 02:59:20,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2020-11-28 02:59:20,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 847. [2020-11-28 02:59:20,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 847 states. [2020-11-28 02:59:20,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1229 transitions. [2020-11-28 02:59:20,214 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1229 transitions. Word has length 141 [2020-11-28 02:59:20,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:20,214 INFO L481 AbstractCegarLoop]: Abstraction has 847 states and 1229 transitions. [2020-11-28 02:59:20,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:20,214 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1229 transitions. [2020-11-28 02:59:20,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-11-28 02:59:20,217 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:20,218 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:20,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-28 02:59:20,218 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:20,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:20,219 INFO L82 PathProgramCache]: Analyzing trace with hash 75909554, now seen corresponding path program 1 times [2020-11-28 02:59:20,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:20,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650882218] [2020-11-28 02:59:20,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-11-28 02:59:20,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650882218] [2020-11-28 02:59:20,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:20,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:20,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887934089] [2020-11-28 02:59:20,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:20,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:20,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:20,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:20,307 INFO L87 Difference]: Start difference. First operand 847 states and 1229 transitions. Second operand 3 states. [2020-11-28 02:59:20,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:20,587 INFO L93 Difference]: Finished difference Result 1700 states and 2468 transitions. [2020-11-28 02:59:20,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:20,588 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2020-11-28 02:59:20,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:20,593 INFO L225 Difference]: With dead ends: 1700 [2020-11-28 02:59:20,594 INFO L226 Difference]: Without dead ends: 845 [2020-11-28 02:59:20,595 INFO L677 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 [2020-11-28 02:59:20,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2020-11-28 02:59:20,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 831. [2020-11-28 02:59:20,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2020-11-28 02:59:20,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1206 transitions. [2020-11-28 02:59:20,639 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1206 transitions. Word has length 142 [2020-11-28 02:59:20,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:20,640 INFO L481 AbstractCegarLoop]: Abstraction has 831 states and 1206 transitions. [2020-11-28 02:59:20,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:20,640 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1206 transitions. [2020-11-28 02:59:20,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-28 02:59:20,642 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:20,643 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2020-11-28 02:59:20,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-28 02:59:20,643 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:20,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:20,644 INFO L82 PathProgramCache]: Analyzing trace with hash -2072592764, now seen corresponding path program 1 times [2020-11-28 02:59:20,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:20,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067571151] [2020-11-28 02:59:20,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-11-28 02:59:20,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067571151] [2020-11-28 02:59:20,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:20,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:20,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892798105] [2020-11-28 02:59:20,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:20,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:20,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:20,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:20,706 INFO L87 Difference]: Start difference. First operand 831 states and 1206 transitions. Second operand 3 states. [2020-11-28 02:59:20,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:20,987 INFO L93 Difference]: Finished difference Result 1666 states and 2418 transitions. [2020-11-28 02:59:20,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:20,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 146 [2020-11-28 02:59:20,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:20,993 INFO L225 Difference]: With dead ends: 1666 [2020-11-28 02:59:20,993 INFO L226 Difference]: Without dead ends: 843 [2020-11-28 02:59:20,994 INFO L677 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 [2020-11-28 02:59:20,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-11-28 02:59:21,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 831. [2020-11-28 02:59:21,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2020-11-28 02:59:21,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1199 transitions. [2020-11-28 02:59:21,039 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1199 transitions. Word has length 146 [2020-11-28 02:59:21,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:21,039 INFO L481 AbstractCegarLoop]: Abstraction has 831 states and 1199 transitions. [2020-11-28 02:59:21,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:21,040 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1199 transitions. [2020-11-28 02:59:21,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-11-28 02:59:21,042 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:21,042 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2020-11-28 02:59:21,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-28 02:59:21,043 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:21,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:21,043 INFO L82 PathProgramCache]: Analyzing trace with hash 369501830, now seen corresponding path program 1 times [2020-11-28 02:59:21,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:21,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643272583] [2020-11-28 02:59:21,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-11-28 02:59:21,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643272583] [2020-11-28 02:59:21,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:21,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:21,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668698125] [2020-11-28 02:59:21,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:21,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:21,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:21,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:21,108 INFO L87 Difference]: Start difference. First operand 831 states and 1199 transitions. Second operand 3 states. [2020-11-28 02:59:21,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:21,360 INFO L93 Difference]: Finished difference Result 1666 states and 2404 transitions. [2020-11-28 02:59:21,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:21,361 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 147 [2020-11-28 02:59:21,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:21,366 INFO L225 Difference]: With dead ends: 1666 [2020-11-28 02:59:21,367 INFO L226 Difference]: Without dead ends: 826 [2020-11-28 02:59:21,369 INFO L677 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 [2020-11-28 02:59:21,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2020-11-28 02:59:21,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 814. [2020-11-28 02:59:21,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2020-11-28 02:59:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1170 transitions. [2020-11-28 02:59:21,410 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1170 transitions. Word has length 147 [2020-11-28 02:59:21,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:21,411 INFO L481 AbstractCegarLoop]: Abstraction has 814 states and 1170 transitions. [2020-11-28 02:59:21,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:21,411 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1170 transitions. [2020-11-28 02:59:21,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-11-28 02:59:21,413 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:21,414 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2020-11-28 02:59:21,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-28 02:59:21,414 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:21,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:21,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1770310156, now seen corresponding path program 1 times [2020-11-28 02:59:21,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:21,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938986336] [2020-11-28 02:59:21,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:21,491 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-11-28 02:59:21,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938986336] [2020-11-28 02:59:21,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:21,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:21,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316957138] [2020-11-28 02:59:21,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:21,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:21,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:21,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:21,494 INFO L87 Difference]: Start difference. First operand 814 states and 1170 transitions. Second operand 3 states. [2020-11-28 02:59:21,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:21,570 INFO L93 Difference]: Finished difference Result 2412 states and 3460 transitions. [2020-11-28 02:59:21,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:21,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2020-11-28 02:59:21,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:21,580 INFO L225 Difference]: With dead ends: 2412 [2020-11-28 02:59:21,581 INFO L226 Difference]: Without dead ends: 1606 [2020-11-28 02:59:21,583 INFO L677 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 [2020-11-28 02:59:21,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2020-11-28 02:59:21,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 816. [2020-11-28 02:59:21,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 816 states. [2020-11-28 02:59:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1172 transitions. [2020-11-28 02:59:21,632 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1172 transitions. Word has length 154 [2020-11-28 02:59:21,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:21,633 INFO L481 AbstractCegarLoop]: Abstraction has 816 states and 1172 transitions. [2020-11-28 02:59:21,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1172 transitions. [2020-11-28 02:59:21,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-11-28 02:59:21,637 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:21,638 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2020-11-28 02:59:21,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-28 02:59:21,638 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:21,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:21,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1570716982, now seen corresponding path program 1 times [2020-11-28 02:59:21,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:21,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408503271] [2020-11-28 02:59:21,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-11-28 02:59:21,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408503271] [2020-11-28 02:59:21,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:21,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:21,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324314964] [2020-11-28 02:59:21,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:21,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:21,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:21,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:21,713 INFO L87 Difference]: Start difference. First operand 816 states and 1172 transitions. Second operand 3 states. [2020-11-28 02:59:21,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:21,822 INFO L93 Difference]: Finished difference Result 2411 states and 3456 transitions. [2020-11-28 02:59:21,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:21,823 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2020-11-28 02:59:21,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:21,833 INFO L225 Difference]: With dead ends: 2411 [2020-11-28 02:59:21,833 INFO L226 Difference]: Without dead ends: 1603 [2020-11-28 02:59:21,836 INFO L677 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 [2020-11-28 02:59:21,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2020-11-28 02:59:21,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1601. [2020-11-28 02:59:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1601 states. [2020-11-28 02:59:21,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 2292 transitions. [2020-11-28 02:59:21,959 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 2292 transitions. Word has length 154 [2020-11-28 02:59:21,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:21,960 INFO L481 AbstractCegarLoop]: Abstraction has 1601 states and 2292 transitions. [2020-11-28 02:59:21,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:21,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 2292 transitions. [2020-11-28 02:59:21,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-11-28 02:59:21,962 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:21,963 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2020-11-28 02:59:21,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-28 02:59:21,963 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:21,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:21,964 INFO L82 PathProgramCache]: Analyzing trace with hash -362729202, now seen corresponding path program 1 times [2020-11-28 02:59:21,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:21,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714877603] [2020-11-28 02:59:21,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-11-28 02:59:22,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714877603] [2020-11-28 02:59:22,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:22,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:22,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747300119] [2020-11-28 02:59:22,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:22,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:22,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:22,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:22,115 INFO L87 Difference]: Start difference. First operand 1601 states and 2292 transitions. Second operand 3 states. [2020-11-28 02:59:22,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:22,346 INFO L93 Difference]: Finished difference Result 4747 states and 6780 transitions. [2020-11-28 02:59:22,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:22,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 156 [2020-11-28 02:59:22,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:22,367 INFO L225 Difference]: With dead ends: 4747 [2020-11-28 02:59:22,367 INFO L226 Difference]: Without dead ends: 3154 [2020-11-28 02:59:22,372 INFO L677 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 [2020-11-28 02:59:22,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2020-11-28 02:59:22,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 1601. [2020-11-28 02:59:22,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1601 states. [2020-11-28 02:59:22,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 2288 transitions. [2020-11-28 02:59:22,542 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 2288 transitions. Word has length 156 [2020-11-28 02:59:22,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:22,543 INFO L481 AbstractCegarLoop]: Abstraction has 1601 states and 2288 transitions. [2020-11-28 02:59:22,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:22,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 2288 transitions. [2020-11-28 02:59:22,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-11-28 02:59:22,546 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:22,547 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2020-11-28 02:59:22,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-28 02:59:22,547 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:22,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:22,548 INFO L82 PathProgramCache]: Analyzing trace with hash -957693967, now seen corresponding path program 1 times [2020-11-28 02:59:22,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:22,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065163723] [2020-11-28 02:59:22,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-28 02:59:22,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065163723] [2020-11-28 02:59:22,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:22,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:22,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392430694] [2020-11-28 02:59:22,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:59:22,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:22,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:59:22,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:59:22,616 INFO L87 Difference]: Start difference. First operand 1601 states and 2288 transitions. Second operand 3 states. [2020-11-28 02:59:22,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:22,929 INFO L93 Difference]: Finished difference Result 4783 states and 6836 transitions. [2020-11-28 02:59:22,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:59:22,930 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 157 [2020-11-28 02:59:22,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:22,966 INFO L225 Difference]: With dead ends: 4783 [2020-11-28 02:59:22,966 INFO L226 Difference]: Without dead ends: 3190 [2020-11-28 02:59:22,969 INFO L677 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 [2020-11-28 02:59:22,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2020-11-28 02:59:23,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 3188. [2020-11-28 02:59:23,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3188 states. [2020-11-28 02:59:23,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 4472 transitions. [2020-11-28 02:59:23,165 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 4472 transitions. Word has length 157 [2020-11-28 02:59:23,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:23,165 INFO L481 AbstractCegarLoop]: Abstraction has 3188 states and 4472 transitions. [2020-11-28 02:59:23,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:59:23,165 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 4472 transitions. [2020-11-28 02:59:23,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-11-28 02:59:23,170 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:23,170 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2020-11-28 02:59:23,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-28 02:59:23,170 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:23,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:23,171 INFO L82 PathProgramCache]: Analyzing trace with hash -3753809, now seen corresponding path program 1 times [2020-11-28 02:59:23,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:23,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477081465] [2020-11-28 02:59:23,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:59:23,207 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:59:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:59:23,243 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:59:23,339 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:59:23,339 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 02:59:23,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-28 02:59:23,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:59:23 BoogieIcfgContainer [2020-11-28 02:59:23,523 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 02:59:23,523 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:59:23,523 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:59:23,524 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:59:23,524 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:59:09" (3/4) ... [2020-11-28 02:59:23,526 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 02:59:23,646 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_7f70ac21-5d83-47f6-9f63-b16ec0ebba51/bin/uautomizer/witness.graphml [2020-11-28 02:59:23,646 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:59:23,648 INFO L168 Benchmark]: Toolchain (without parser) took 16612.15 ms. Allocated memory was 107.0 MB in the beginning and 274.7 MB in the end (delta: 167.8 MB). Free memory was 74.4 MB in the beginning and 123.6 MB in the end (delta: -49.3 MB). Peak memory consumption was 117.6 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:23,649 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 71.3 MB. Free memory was 34.1 MB in the beginning and 34.1 MB in the end (delta: 33.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:59:23,649 INFO L168 Benchmark]: CACSL2BoogieTranslator took 576.44 ms. Allocated memory is still 107.0 MB. Free memory was 74.1 MB in the beginning and 77.4 MB in the end (delta: -3.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:23,650 INFO L168 Benchmark]: Boogie Procedure Inliner took 126.25 ms. Allocated memory is still 107.0 MB. Free memory was 77.4 MB in the beginning and 74.1 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:23,650 INFO L168 Benchmark]: Boogie Preprocessor took 96.51 ms. Allocated memory is still 107.0 MB. Free memory was 74.1 MB in the beginning and 72.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:23,651 INFO L168 Benchmark]: RCFGBuilder took 1402.92 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 72.0 MB in the beginning and 89.7 MB in the end (delta: -17.7 MB). Peak memory consumption was 50.9 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:23,651 INFO L168 Benchmark]: TraceAbstraction took 14274.30 ms. Allocated memory was 130.0 MB in the beginning and 274.7 MB in the end (delta: 144.7 MB). Free memory was 89.7 MB in the beginning and 141.6 MB in the end (delta: -51.9 MB). Peak memory consumption was 92.5 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:23,652 INFO L168 Benchmark]: Witness Printer took 123.32 ms. Allocated memory is still 274.7 MB. Free memory was 141.6 MB in the beginning and 123.6 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:23,654 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 71.3 MB. Free memory was 34.1 MB in the beginning and 34.1 MB in the end (delta: 33.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 576.44 ms. Allocated memory is still 107.0 MB. Free memory was 74.1 MB in the beginning and 77.4 MB in the end (delta: -3.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 126.25 ms. Allocated memory is still 107.0 MB. Free memory was 77.4 MB in the beginning and 74.1 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 96.51 ms. Allocated memory is still 107.0 MB. Free memory was 74.1 MB in the beginning and 72.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1402.92 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 72.0 MB in the beginning and 89.7 MB in the end (delta: -17.7 MB). Peak memory consumption was 50.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14274.30 ms. Allocated memory was 130.0 MB in the beginning and 274.7 MB in the end (delta: 144.7 MB). Free memory was 89.7 MB in the beginning and 141.6 MB in the end (delta: -51.9 MB). Peak memory consumption was 92.5 MB. Max. memory is 16.1 GB. * Witness Printer took 123.32 ms. Allocated memory is still 274.7 MB. Free memory was 141.6 MB in the beginning and 123.6 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L704] int s ; [L705] int tmp ; [L709] s = 8464 [L14] int s__info_callback = __VERIFIER_nondet_int() ; [L15] int s__in_handshake = __VERIFIER_nondet_int() ; [L16] int s__state ; [L17] int s__new_session ; [L18] int s__server ; [L19] int s__version = __VERIFIER_nondet_int() ; [L20] int s__type ; [L21] int s__init_num ; [L22] int s__hit = __VERIFIER_nondet_int() ; [L23] int s__rwstate ; [L24] int s__init_buf___0 = 1; [L25] int s__debug = __VERIFIER_nondet_int() ; [L26] int s__shutdown ; [L27] int s__cert = __VERIFIER_nondet_int() ; [L28] int s__options = __VERIFIER_nondet_int() ; [L29] int s__verify_mode = __VERIFIER_nondet_int() ; [L30] int s__session__peer = __VERIFIER_nondet_int() ; [L31] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L32] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L33] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L34] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L35] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L36] int s__s3__tmp__cert_request ; [L37] int s__s3__tmp__reuse_message ; [L38] int s__s3__tmp__use_rsa_tmp ; [L39] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L40] int s__s3__tmp__new_cipher__algorithms ; [L41] int s__s3__tmp__next_state___0 ; [L42] int s__s3__tmp__new_cipher__algo_strength ; [L43] int s__session__cipher ; [L44] int buf ; [L45] unsigned long l ; [L46] unsigned long Time ; [L47] unsigned long tmp ; [L48] int cb ; [L49] long num1 = __VERIFIER_nondet_long() ; [L50] int ret ; [L51] int new_state ; [L52] int state ; [L53] int skip ; [L54] int got_new_session ; [L55] int tmp___1 = __VERIFIER_nondet_int() ; [L56] int tmp___2 = __VERIFIER_nondet_int() ; [L57] int tmp___3 = __VERIFIER_nondet_int() ; [L58] int tmp___4 = __VERIFIER_nondet_int() ; [L59] int tmp___5 = __VERIFIER_nondet_int() ; [L60] int tmp___6 = __VERIFIER_nondet_int() ; [L61] int tmp___7 ; [L62] long tmp___8 = __VERIFIER_nondet_long() ; [L63] int tmp___9 = __VERIFIER_nondet_int() ; [L64] int tmp___10 = __VERIFIER_nondet_int() ; [L65] int blastFlag ; [L66] int __cil_tmp55 ; [L67] unsigned long __cil_tmp56 ; [L68] unsigned long __cil_tmp57 ; [L69] unsigned long __cil_tmp58 ; [L70] unsigned long __cil_tmp59 ; [L71] int __cil_tmp60 ; [L72] unsigned long __cil_tmp61 = __VERIFIER_nondet_ulong() ; [L76] s__state = initial_state [L77] blastFlag = 0 [L78] tmp = __VERIFIER_nondet_int() [L79] Time = tmp [L80] cb = 0 [L81] ret = -1 [L82] skip = 0 [L83] got_new_session = 0 [L84] COND TRUE s__info_callback != 0 [L85] cb = s__info_callback [L91] s__in_handshake ++ [L92] COND FALSE !(tmp___1 + 12288) [L97] COND FALSE !(s__cert == 0) [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 8192) [L113] COND FALSE !(s__state == 24576) [L116] COND FALSE !(s__state == 8195) [L119] COND FALSE !(s__state == 8480) [L122] COND FALSE !(s__state == 8481) [L125] COND FALSE !(s__state == 8482) [L128] COND TRUE s__state == 8464 [L274] s__shutdown = 0 [L275] ret = __VERIFIER_nondet_int() [L276] COND TRUE blastFlag == 0 [L277] blastFlag = 1 [L279] COND FALSE !(ret <= 0) [L282] got_new_session = 1 [L283] s__state = 8496 [L284] s__init_num = 0 [L653] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L654] COND FALSE !(! s__s3__tmp__reuse_message) [L688] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 8192) [L113] COND FALSE !(s__state == 24576) [L116] COND FALSE !(s__state == 8195) [L119] COND FALSE !(s__state == 8480) [L122] COND FALSE !(s__state == 8481) [L125] COND FALSE !(s__state == 8482) [L128] COND FALSE !(s__state == 8464) [L131] COND FALSE !(s__state == 8465) [L134] COND FALSE !(s__state == 8466) [L137] COND TRUE s__state == 8496 [L288] ret = __VERIFIER_nondet_int() [L289] COND TRUE blastFlag == 1 [L290] blastFlag = 2 [L292] COND FALSE !(ret <= 0) [L295] COND FALSE !(\read(s__hit)) [L298] s__state = 8512 [L300] s__init_num = 0 [L653] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L654] COND FALSE !(! s__s3__tmp__reuse_message) [L688] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 8192) [L113] COND FALSE !(s__state == 24576) [L116] COND FALSE !(s__state == 8195) [L119] COND FALSE !(s__state == 8480) [L122] COND FALSE !(s__state == 8481) [L125] COND FALSE !(s__state == 8482) [L128] COND FALSE !(s__state == 8464) [L131] COND FALSE !(s__state == 8465) [L134] COND FALSE !(s__state == 8466) [L137] COND FALSE !(s__state == 8496) [L140] COND FALSE !(s__state == 8497) [L143] COND TRUE s__state == 8512 [L305] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L306] __cil_tmp56 = (unsigned long )s__s3__tmp__new_cipher__algorithms [L307] COND TRUE __cil_tmp56 + 256UL [L308] __cil_tmp56 = 256345 [L309] skip = 1 [L320] s__state = 8528 [L321] s__init_num = 0 [L653] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L654] COND FALSE !(! s__s3__tmp__reuse_message) [L688] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 8192) [L113] COND FALSE !(s__state == 24576) [L116] COND FALSE !(s__state == 8195) [L119] COND FALSE !(s__state == 8480) [L122] COND FALSE !(s__state == 8481) [L125] COND FALSE !(s__state == 8482) [L128] COND FALSE !(s__state == 8464) [L131] COND FALSE !(s__state == 8465) [L134] COND FALSE !(s__state == 8466) [L137] COND FALSE !(s__state == 8496) [L140] COND FALSE !(s__state == 8497) [L143] COND FALSE !(s__state == 8512) [L146] COND FALSE !(s__state == 8513) [L149] COND TRUE s__state == 8528 [L325] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L326] l = (unsigned long )s__s3__tmp__new_cipher__algorithms [L328] __cil_tmp57 = (unsigned long )s__options [L329] COND TRUE __cil_tmp57 + 2097152UL [L330] s__s3__tmp__use_rsa_tmp = 1 [L335] COND TRUE \read(s__s3__tmp__use_rsa_tmp) [L363] ret = __VERIFIER_nondet_int() [L364] COND FALSE !(blastFlag == 3) [L367] COND FALSE !(ret <= 0) [L384] s__state = 8544 [L385] s__init_num = 0 [L653] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L654] COND FALSE !(! s__s3__tmp__reuse_message) [L688] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 8192) [L113] COND FALSE !(s__state == 24576) [L116] COND FALSE !(s__state == 8195) [L119] COND FALSE !(s__state == 8480) [L122] COND FALSE !(s__state == 8481) [L125] COND FALSE !(s__state == 8482) [L128] COND FALSE !(s__state == 8464) [L131] COND FALSE !(s__state == 8465) [L134] COND FALSE !(s__state == 8466) [L137] COND FALSE !(s__state == 8496) [L140] COND FALSE !(s__state == 8497) [L143] COND FALSE !(s__state == 8512) [L146] COND FALSE !(s__state == 8513) [L149] COND FALSE !(s__state == 8528) [L152] COND FALSE !(s__state == 8529) [L155] COND TRUE s__state == 8544 [L389] COND TRUE s__verify_mode + 1 [L390] COND TRUE s__session__peer != 0 [L391] COND TRUE s__verify_mode + 4 [L392] s__verify_mode = 123 [L393] skip = 1 [L394] s__s3__tmp__cert_request = 0 [L395] s__state = 8560 [L653] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L654] COND FALSE !(! s__s3__tmp__reuse_message) [L688] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 8192) [L113] COND FALSE !(s__state == 24576) [L116] COND FALSE !(s__state == 8195) [L119] COND FALSE !(s__state == 8480) [L122] COND FALSE !(s__state == 8481) [L125] COND FALSE !(s__state == 8482) [L128] COND FALSE !(s__state == 8464) [L131] COND FALSE !(s__state == 8465) [L134] COND FALSE !(s__state == 8466) [L137] COND FALSE !(s__state == 8496) [L140] COND FALSE !(s__state == 8497) [L143] COND FALSE !(s__state == 8512) [L146] COND FALSE !(s__state == 8513) [L149] COND FALSE !(s__state == 8528) [L152] COND FALSE !(s__state == 8529) [L155] COND FALSE !(s__state == 8544) [L158] COND FALSE !(s__state == 8545) [L161] COND TRUE s__state == 8560 [L439] ret = __VERIFIER_nondet_int() [L440] COND FALSE !(ret <= 0) [L443] s__s3__tmp__next_state___0 = 8576 [L444] s__state = 8448 [L445] s__init_num = 0 [L653] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L654] COND TRUE ! s__s3__tmp__reuse_message [L655] COND TRUE ! skip [L656] COND TRUE state == 8560 [L657] COND TRUE s__state == 8448 [L658] COND TRUE s__verify_mode != -1 [L659] COND TRUE s__verify_mode != -2 [L660] COND TRUE __cil_tmp61 != 9021 [L661] COND TRUE __cil_tmp58 != 4294967294 [L662] COND TRUE blastFlag != 4 [L663] COND TRUE tmp___7 != 1024 [L3] __assert_fail("0", "s3_srvr_12.cil.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 168 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.0s, OverallIterations: 35, TraceHistogramMax: 6, AutomataDifference: 9.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7183 SDtfs, 6874 SDslu, 1823 SDs, 0 SdLazy, 2872 SolverSat, 1350 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 104 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3188occurred in iteration=34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.6s AutomataMinimizationTime, 34 MinimizatonAttempts, 2673 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 3216 NumberOfCodeBlocks, 3216 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 3025 ConstructedInterpolants, 0 QuantifiedInterpolants, 576216 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 34 InterpolantComputations, 34 PerfectInterpolantSequences, 2752/2752 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...