./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_srvr_13.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_56092ffd-299f-4cbb-9e17-1b75c991e34e/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_56092ffd-299f-4cbb-9e17-1b75c991e34e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_56092ffd-299f-4cbb-9e17-1b75c991e34e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_56092ffd-299f-4cbb-9e17-1b75c991e34e/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_srvr_13.cil.c -s /tmp/vcloud-vcloud-master/worker/run_dir_56092ffd-299f-4cbb-9e17-1b75c991e34e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_56092ffd-299f-4cbb-9e17-1b75c991e34e/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 390f2eba6fdf8824b99921adcaaa6cdc728c2d2b ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 [2020-11-29 21:08:56,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 21:08:56,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 21:08:56,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 21:08:56,656 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 21:08:56,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 21:08:56,671 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 21:08:56,674 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 21:08:56,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 21:08:56,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 21:08:56,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 21:08:56,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 21:08:56,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 21:08:56,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 21:08:56,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 21:08:56,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 21:08:56,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 21:08:56,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 21:08:56,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 21:08:56,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 21:08:56,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 21:08:56,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 21:08:56,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 21:08:56,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 21:08:56,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 21:08:56,700 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 21:08:56,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 21:08:56,701 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 21:08:56,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 21:08:56,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 21:08:56,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 21:08:56,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 21:08:56,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 21:08:56,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 21:08:56,707 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 21:08:56,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 21:08:56,708 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 21:08:56,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 21:08:56,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 21:08:56,710 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 21:08:56,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 21:08:56,712 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_56092ffd-299f-4cbb-9e17-1b75c991e34e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 21:08:56,737 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 21:08:56,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 21:08:56,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 21:08:56,740 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 21:08:56,740 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 21:08:56,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 21:08:56,741 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 21:08:56,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 21:08:56,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 21:08:56,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 21:08:56,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 21:08:56,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 21:08:56,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 21:08:56,751 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 21:08:56,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 21:08:56,751 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 21:08:56,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 21:08:56,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 21:08:56,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 21:08:56,752 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 21:08:56,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 21:08:56,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:08:56,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 21:08:56,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 21:08:56,754 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 21:08:56,754 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 21:08:56,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 21:08:56,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 21:08:56,755 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 21:08:56,755 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_56092ffd-299f-4cbb-9e17-1b75c991e34e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_56092ffd-299f-4cbb-9e17-1b75c991e34e/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 390f2eba6fdf8824b99921adcaaa6cdc728c2d2b [2020-11-29 21:08:57,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 21:08:57,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 21:08:57,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 21:08:57,057 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 21:08:57,058 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 21:08:57,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_56092ffd-299f-4cbb-9e17-1b75c991e34e/bin/uautomizer/../../sv-benchmarks/c/openssl-simplified/s3_srvr_13.cil.c [2020-11-29 21:08:57,139 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_56092ffd-299f-4cbb-9e17-1b75c991e34e/bin/uautomizer/data/cffcab3c1/1055e5b430c649e79b07da4a1479d0f3/FLAG8c9ba4100 [2020-11-29 21:08:57,677 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 21:08:57,678 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_56092ffd-299f-4cbb-9e17-1b75c991e34e/sv-benchmarks/c/openssl-simplified/s3_srvr_13.cil.c [2020-11-29 21:08:57,689 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_56092ffd-299f-4cbb-9e17-1b75c991e34e/bin/uautomizer/data/cffcab3c1/1055e5b430c649e79b07da4a1479d0f3/FLAG8c9ba4100 [2020-11-29 21:08:58,093 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_56092ffd-299f-4cbb-9e17-1b75c991e34e/bin/uautomizer/data/cffcab3c1/1055e5b430c649e79b07da4a1479d0f3 [2020-11-29 21:08:58,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 21:08:58,101 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 21:08:58,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 21:08:58,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 21:08:58,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 21:08:58,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:08:58" (1/1) ... [2020-11-29 21:08:58,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e502df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:08:58, skipping insertion in model container [2020-11-29 21:08:58,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:08:58" (1/1) ... [2020-11-29 21:08:58,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 21:08:58,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 21:08:58,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:08:58,418 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 21:08:58,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:08:58,508 INFO L208 MainTranslator]: Completed translation [2020-11-29 21:08:58,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:08:58 WrapperNode [2020-11-29 21:08:58,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 21:08:58,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 21:08:58,510 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 21:08:58,510 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 21:08:58,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:08:58" (1/1) ... [2020-11-29 21:08:58,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:08:58" (1/1) ... [2020-11-29 21:08:58,601 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 21:08:58,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 21:08:58,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 21:08:58,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 21:08:58,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:08:58" (1/1) ... [2020-11-29 21:08:58,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:08:58" (1/1) ... [2020-11-29 21:08:58,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:08:58" (1/1) ... [2020-11-29 21:08:58,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:08:58" (1/1) ... [2020-11-29 21:08:58,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:08:58" (1/1) ... [2020-11-29 21:08:58,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:08:58" (1/1) ... [2020-11-29 21:08:58,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:08:58" (1/1) ... [2020-11-29 21:08:58,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 21:08:58,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 21:08:58,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 21:08:58,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 21:08:58,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:08:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_56092ffd-299f-4cbb-9e17-1b75c991e34e/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 [2020-11-29 21:08:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 21:08:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 21:08:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 21:08:58,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 21:08:58,905 WARN L798 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-11-29 21:08:59,758 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-11-29 21:08:59,759 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-11-29 21:08:59,776 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 21:08:59,776 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-29 21:08:59,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:08:59 BoogieIcfgContainer [2020-11-29 21:08:59,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 21:08:59,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 21:08:59,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 21:08:59,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 21:08:59,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 09:08:58" (1/3) ... [2020-11-29 21:08:59,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11fea750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:08:59, skipping insertion in model container [2020-11-29 21:08:59,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:08:58" (2/3) ... [2020-11-29 21:08:59,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11fea750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:08:59, skipping insertion in model container [2020-11-29 21:08:59,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:08:59" (3/3) ... [2020-11-29 21:08:59,791 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_13.cil.c [2020-11-29 21:08:59,801 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 21:08:59,805 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 21:08:59,816 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 21:08:59,840 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 21:08:59,840 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 21:08:59,840 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 21:08:59,840 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 21:08:59,840 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 21:08:59,840 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 21:08:59,840 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 21:08:59,841 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 21:08:59,857 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states. [2020-11-29 21:08:59,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 21:08:59,865 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:08:59,866 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] [2020-11-29 21:08:59,866 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:08:59,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:08:59,878 INFO L82 PathProgramCache]: Analyzing trace with hash -651780530, now seen corresponding path program 1 times [2020-11-29 21:08:59,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:08:59,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739669335] [2020-11-29 21:08:59,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:09:00,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739669335] [2020-11-29 21:09:00,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:00,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:00,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068125241] [2020-11-29 21:09:00,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:00,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:00,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:00,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:00,175 INFO L87 Difference]: Start difference. First operand 154 states. Second operand 3 states. [2020-11-29 21:09:00,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:00,490 INFO L93 Difference]: Finished difference Result 326 states and 558 transitions. [2020-11-29 21:09:00,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:00,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-11-29 21:09:00,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:00,516 INFO L225 Difference]: With dead ends: 326 [2020-11-29 21:09:00,516 INFO L226 Difference]: Without dead ends: 160 [2020-11-29 21:09:00,525 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 [2020-11-29 21:09:00,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-11-29 21:09:00,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2020-11-29 21:09:00,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-11-29 21:09:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 249 transitions. [2020-11-29 21:09:00,573 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 249 transitions. Word has length 26 [2020-11-29 21:09:00,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:00,573 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 249 transitions. [2020-11-29 21:09:00,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:00,574 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 249 transitions. [2020-11-29 21:09:00,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 21:09:00,575 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:00,576 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] [2020-11-29 21:09:00,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 21:09:00,576 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:00,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:00,577 INFO L82 PathProgramCache]: Analyzing trace with hash 490720896, now seen corresponding path program 1 times [2020-11-29 21:09:00,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:00,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210717220] [2020-11-29 21:09:00,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:09:00,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210717220] [2020-11-29 21:09:00,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:00,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:00,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437243473] [2020-11-29 21:09:00,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:00,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:00,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:00,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:00,648 INFO L87 Difference]: Start difference. First operand 158 states and 249 transitions. Second operand 3 states. [2020-11-29 21:09:00,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:00,860 INFO L93 Difference]: Finished difference Result 330 states and 519 transitions. [2020-11-29 21:09:00,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:00,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-11-29 21:09:00,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:00,864 INFO L225 Difference]: With dead ends: 330 [2020-11-29 21:09:00,865 INFO L226 Difference]: Without dead ends: 180 [2020-11-29 21:09:00,866 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 [2020-11-29 21:09:00,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-11-29 21:09:00,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2020-11-29 21:09:00,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-11-29 21:09:00,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 279 transitions. [2020-11-29 21:09:00,912 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 279 transitions. Word has length 27 [2020-11-29 21:09:00,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:00,912 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 279 transitions. [2020-11-29 21:09:00,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:00,912 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 279 transitions. [2020-11-29 21:09:00,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 21:09:00,914 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:00,914 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] [2020-11-29 21:09:00,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 21:09:00,914 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:00,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:00,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1046842997, now seen corresponding path program 1 times [2020-11-29 21:09:00,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:00,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355477898] [2020-11-29 21:09:00,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:09:01,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355477898] [2020-11-29 21:09:01,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:01,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:01,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978410279] [2020-11-29 21:09:01,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:01,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:01,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:01,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:01,037 INFO L87 Difference]: Start difference. First operand 180 states and 279 transitions. Second operand 3 states. [2020-11-29 21:09:01,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:01,245 INFO L93 Difference]: Finished difference Result 360 states and 560 transitions. [2020-11-29 21:09:01,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:01,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-11-29 21:09:01,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:01,250 INFO L225 Difference]: With dead ends: 360 [2020-11-29 21:09:01,250 INFO L226 Difference]: Without dead ends: 188 [2020-11-29 21:09:01,251 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 [2020-11-29 21:09:01,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-11-29 21:09:01,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2020-11-29 21:09:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-11-29 21:09:01,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 290 transitions. [2020-11-29 21:09:01,275 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 290 transitions. Word has length 27 [2020-11-29 21:09:01,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:01,275 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 290 transitions. [2020-11-29 21:09:01,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:01,276 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 290 transitions. [2020-11-29 21:09:01,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 21:09:01,277 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:01,277 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] [2020-11-29 21:09:01,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 21:09:01,277 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:01,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:01,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1631613131, now seen corresponding path program 1 times [2020-11-29 21:09:01,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:01,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591031480] [2020-11-29 21:09:01,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:09:01,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591031480] [2020-11-29 21:09:01,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:01,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:01,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711444081] [2020-11-29 21:09:01,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:01,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:01,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:01,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:01,381 INFO L87 Difference]: Start difference. First operand 186 states and 290 transitions. Second operand 3 states. [2020-11-29 21:09:01,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:01,585 INFO L93 Difference]: Finished difference Result 365 states and 570 transitions. [2020-11-29 21:09:01,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:01,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-11-29 21:09:01,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:01,587 INFO L225 Difference]: With dead ends: 365 [2020-11-29 21:09:01,587 INFO L226 Difference]: Without dead ends: 187 [2020-11-29 21:09:01,589 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 [2020-11-29 21:09:01,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-11-29 21:09:01,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2020-11-29 21:09:01,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-11-29 21:09:01,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 291 transitions. [2020-11-29 21:09:01,602 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 291 transitions. Word has length 27 [2020-11-29 21:09:01,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:01,602 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 291 transitions. [2020-11-29 21:09:01,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:01,603 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 291 transitions. [2020-11-29 21:09:01,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 21:09:01,604 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:01,604 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] [2020-11-29 21:09:01,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 21:09:01,605 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:01,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:01,605 INFO L82 PathProgramCache]: Analyzing trace with hash -431278894, now seen corresponding path program 1 times [2020-11-29 21:09:01,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:01,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944199011] [2020-11-29 21:09:01,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:09:01,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944199011] [2020-11-29 21:09:01,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:01,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:01,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470297961] [2020-11-29 21:09:01,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:01,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:01,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:01,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:01,676 INFO L87 Difference]: Start difference. First operand 187 states and 291 transitions. Second operand 3 states. [2020-11-29 21:09:01,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:01,840 INFO L93 Difference]: Finished difference Result 376 states and 582 transitions. [2020-11-29 21:09:01,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:01,840 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-11-29 21:09:01,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:01,842 INFO L225 Difference]: With dead ends: 376 [2020-11-29 21:09:01,842 INFO L226 Difference]: Without dead ends: 197 [2020-11-29 21:09:01,843 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 [2020-11-29 21:09:01,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-11-29 21:09:01,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 187. [2020-11-29 21:09:01,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-11-29 21:09:01,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 289 transitions. [2020-11-29 21:09:01,855 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 289 transitions. Word has length 28 [2020-11-29 21:09:01,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:01,855 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 289 transitions. [2020-11-29 21:09:01,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:01,856 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 289 transitions. [2020-11-29 21:09:01,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 21:09:01,857 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:01,857 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] [2020-11-29 21:09:01,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 21:09:01,858 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:01,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:01,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1682017785, now seen corresponding path program 1 times [2020-11-29 21:09:01,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:01,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834539659] [2020-11-29 21:09:01,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:09:01,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834539659] [2020-11-29 21:09:01,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:01,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:01,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243354155] [2020-11-29 21:09:01,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:01,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:01,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:01,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:01,906 INFO L87 Difference]: Start difference. First operand 187 states and 289 transitions. Second operand 3 states. [2020-11-29 21:09:02,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:02,075 INFO L93 Difference]: Finished difference Result 376 states and 578 transitions. [2020-11-29 21:09:02,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:02,076 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-11-29 21:09:02,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:02,077 INFO L225 Difference]: With dead ends: 376 [2020-11-29 21:09:02,077 INFO L226 Difference]: Without dead ends: 197 [2020-11-29 21:09:02,078 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 [2020-11-29 21:09:02,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-11-29 21:09:02,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 187. [2020-11-29 21:09:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-11-29 21:09:02,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 287 transitions. [2020-11-29 21:09:02,094 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 287 transitions. Word has length 29 [2020-11-29 21:09:02,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:02,094 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 287 transitions. [2020-11-29 21:09:02,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:02,094 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 287 transitions. [2020-11-29 21:09:02,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 21:09:02,101 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:02,101 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] [2020-11-29 21:09:02,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 21:09:02,101 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:02,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:02,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1452653961, now seen corresponding path program 1 times [2020-11-29 21:09:02,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:02,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101502936] [2020-11-29 21:09:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:09:02,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101502936] [2020-11-29 21:09:02,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:02,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:02,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377565688] [2020-11-29 21:09:02,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:02,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:02,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:02,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:02,183 INFO L87 Difference]: Start difference. First operand 187 states and 287 transitions. Second operand 3 states. [2020-11-29 21:09:02,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:02,357 INFO L93 Difference]: Finished difference Result 376 states and 574 transitions. [2020-11-29 21:09:02,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:02,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-11-29 21:09:02,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:02,359 INFO L225 Difference]: With dead ends: 376 [2020-11-29 21:09:02,359 INFO L226 Difference]: Without dead ends: 197 [2020-11-29 21:09:02,360 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 [2020-11-29 21:09:02,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-11-29 21:09:02,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 187. [2020-11-29 21:09:02,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-11-29 21:09:02,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 285 transitions. [2020-11-29 21:09:02,375 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 285 transitions. Word has length 30 [2020-11-29 21:09:02,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:02,377 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 285 transitions. [2020-11-29 21:09:02,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:02,378 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 285 transitions. [2020-11-29 21:09:02,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 21:09:02,382 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:02,382 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] [2020-11-29 21:09:02,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-29 21:09:02,382 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:02,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:02,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1026970664, now seen corresponding path program 1 times [2020-11-29 21:09:02,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:02,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637322611] [2020-11-29 21:09:02,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:09:02,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637322611] [2020-11-29 21:09:02,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:02,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 21:09:02,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791262199] [2020-11-29 21:09:02,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 21:09:02,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:02,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 21:09:02,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 21:09:02,457 INFO L87 Difference]: Start difference. First operand 187 states and 285 transitions. Second operand 4 states. [2020-11-29 21:09:02,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:02,807 INFO L93 Difference]: Finished difference Result 572 states and 871 transitions. [2020-11-29 21:09:02,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 21:09:02,808 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-11-29 21:09:02,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:02,810 INFO L225 Difference]: With dead ends: 572 [2020-11-29 21:09:02,811 INFO L226 Difference]: Without dead ends: 393 [2020-11-29 21:09:02,811 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 [2020-11-29 21:09:02,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-11-29 21:09:02,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 357. [2020-11-29 21:09:02,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-11-29 21:09:02,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 543 transitions. [2020-11-29 21:09:02,831 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 543 transitions. Word has length 30 [2020-11-29 21:09:02,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:02,831 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 543 transitions. [2020-11-29 21:09:02,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 21:09:02,831 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 543 transitions. [2020-11-29 21:09:02,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-29 21:09:02,834 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:02,834 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] [2020-11-29 21:09:02,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-29 21:09:02,834 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:02,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:02,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1801233473, now seen corresponding path program 1 times [2020-11-29 21:09:02,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:02,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561088678] [2020-11-29 21:09:02,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:02,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:09:02,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561088678] [2020-11-29 21:09:02,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:02,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:02,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63202333] [2020-11-29 21:09:02,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:02,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:02,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:02,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:02,908 INFO L87 Difference]: Start difference. First operand 357 states and 543 transitions. Second operand 3 states. [2020-11-29 21:09:03,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:03,121 INFO L93 Difference]: Finished difference Result 781 states and 1197 transitions. [2020-11-29 21:09:03,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:03,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-11-29 21:09:03,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:03,124 INFO L225 Difference]: With dead ends: 781 [2020-11-29 21:09:03,125 INFO L226 Difference]: Without dead ends: 432 [2020-11-29 21:09:03,125 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 [2020-11-29 21:09:03,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-11-29 21:09:03,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 412. [2020-11-29 21:09:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-11-29 21:09:03,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 630 transitions. [2020-11-29 21:09:03,147 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 630 transitions. Word has length 33 [2020-11-29 21:09:03,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:03,148 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 630 transitions. [2020-11-29 21:09:03,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:03,148 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 630 transitions. [2020-11-29 21:09:03,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-29 21:09:03,149 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:03,149 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] [2020-11-29 21:09:03,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-29 21:09:03,149 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:03,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:03,151 INFO L82 PathProgramCache]: Analyzing trace with hash -979083784, now seen corresponding path program 1 times [2020-11-29 21:09:03,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:03,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067103475] [2020-11-29 21:09:03,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:09:03,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067103475] [2020-11-29 21:09:03,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:03,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:03,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650372405] [2020-11-29 21:09:03,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:03,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:03,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:03,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:03,205 INFO L87 Difference]: Start difference. First operand 412 states and 630 transitions. Second operand 3 states. [2020-11-29 21:09:03,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:03,413 INFO L93 Difference]: Finished difference Result 858 states and 1321 transitions. [2020-11-29 21:09:03,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:03,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-11-29 21:09:03,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:03,417 INFO L225 Difference]: With dead ends: 858 [2020-11-29 21:09:03,417 INFO L226 Difference]: Without dead ends: 454 [2020-11-29 21:09:03,418 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 [2020-11-29 21:09:03,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-11-29 21:09:03,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 434. [2020-11-29 21:09:03,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2020-11-29 21:09:03,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 670 transitions. [2020-11-29 21:09:03,439 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 670 transitions. Word has length 34 [2020-11-29 21:09:03,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:03,440 INFO L481 AbstractCegarLoop]: Abstraction has 434 states and 670 transitions. [2020-11-29 21:09:03,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:03,440 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 670 transitions. [2020-11-29 21:09:03,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-29 21:09:03,441 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:03,441 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] [2020-11-29 21:09:03,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-29 21:09:03,441 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:03,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:03,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1380253332, now seen corresponding path program 1 times [2020-11-29 21:09:03,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:03,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175478114] [2020-11-29 21:09:03,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:09:03,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175478114] [2020-11-29 21:09:03,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:03,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:03,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336697302] [2020-11-29 21:09:03,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:03,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:03,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:03,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:03,489 INFO L87 Difference]: Start difference. First operand 434 states and 670 transitions. Second operand 3 states. [2020-11-29 21:09:03,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:03,729 INFO L93 Difference]: Finished difference Result 925 states and 1433 transitions. [2020-11-29 21:09:03,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:03,729 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-11-29 21:09:03,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:03,733 INFO L225 Difference]: With dead ends: 925 [2020-11-29 21:09:03,733 INFO L226 Difference]: Without dead ends: 499 [2020-11-29 21:09:03,734 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 [2020-11-29 21:09:03,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-11-29 21:09:03,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 489. [2020-11-29 21:09:03,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-11-29 21:09:03,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 760 transitions. [2020-11-29 21:09:03,757 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 760 transitions. Word has length 40 [2020-11-29 21:09:03,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:03,757 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 760 transitions. [2020-11-29 21:09:03,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:03,757 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 760 transitions. [2020-11-29 21:09:03,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-29 21:09:03,758 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:03,759 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] [2020-11-29 21:09:03,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-29 21:09:03,759 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:03,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:03,760 INFO L82 PathProgramCache]: Analyzing trace with hash -168828106, now seen corresponding path program 1 times [2020-11-29 21:09:03,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:03,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222188691] [2020-11-29 21:09:03,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:03,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:09:03,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222188691] [2020-11-29 21:09:03,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:03,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:03,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815894349] [2020-11-29 21:09:03,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:03,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:03,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:03,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:03,806 INFO L87 Difference]: Start difference. First operand 489 states and 760 transitions. Second operand 3 states. [2020-11-29 21:09:04,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:04,056 INFO L93 Difference]: Finished difference Result 992 states and 1545 transitions. [2020-11-29 21:09:04,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:04,057 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-11-29 21:09:04,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:04,061 INFO L225 Difference]: With dead ends: 992 [2020-11-29 21:09:04,061 INFO L226 Difference]: Without dead ends: 511 [2020-11-29 21:09:04,062 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 [2020-11-29 21:09:04,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2020-11-29 21:09:04,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 501. [2020-11-29 21:09:04,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2020-11-29 21:09:04,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 782 transitions. [2020-11-29 21:09:04,092 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 782 transitions. Word has length 41 [2020-11-29 21:09:04,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:04,092 INFO L481 AbstractCegarLoop]: Abstraction has 501 states and 782 transitions. [2020-11-29 21:09:04,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:04,093 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 782 transitions. [2020-11-29 21:09:04,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-29 21:09:04,094 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:04,094 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-29 21:09:04,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-29 21:09:04,094 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:04,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:04,095 INFO L82 PathProgramCache]: Analyzing trace with hash -2051620392, now seen corresponding path program 1 times [2020-11-29 21:09:04,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:04,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010975802] [2020-11-29 21:09:04,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:09:04,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010975802] [2020-11-29 21:09:04,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:04,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:04,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645066578] [2020-11-29 21:09:04,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:04,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:04,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:04,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:04,160 INFO L87 Difference]: Start difference. First operand 501 states and 782 transitions. Second operand 3 states. [2020-11-29 21:09:04,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:04,362 INFO L93 Difference]: Finished difference Result 1008 states and 1575 transitions. [2020-11-29 21:09:04,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:04,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-11-29 21:09:04,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:04,366 INFO L225 Difference]: With dead ends: 1008 [2020-11-29 21:09:04,366 INFO L226 Difference]: Without dead ends: 515 [2020-11-29 21:09:04,367 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 [2020-11-29 21:09:04,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2020-11-29 21:09:04,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 501. [2020-11-29 21:09:04,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2020-11-29 21:09:04,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 778 transitions. [2020-11-29 21:09:04,391 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 778 transitions. Word has length 61 [2020-11-29 21:09:04,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:04,392 INFO L481 AbstractCegarLoop]: Abstraction has 501 states and 778 transitions. [2020-11-29 21:09:04,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:04,393 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 778 transitions. [2020-11-29 21:09:04,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-11-29 21:09:04,394 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:04,394 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-11-29 21:09:04,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-29 21:09:04,395 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:04,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:04,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1852313784, now seen corresponding path program 1 times [2020-11-29 21:09:04,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:04,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358546144] [2020-11-29 21:09:04,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:04,446 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:09:04,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358546144] [2020-11-29 21:09:04,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:04,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:04,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849205054] [2020-11-29 21:09:04,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:04,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:04,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:04,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:04,449 INFO L87 Difference]: Start difference. First operand 501 states and 778 transitions. Second operand 3 states. [2020-11-29 21:09:04,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:04,675 INFO L93 Difference]: Finished difference Result 1032 states and 1601 transitions. [2020-11-29 21:09:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:04,676 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-11-29 21:09:04,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:04,679 INFO L225 Difference]: With dead ends: 1032 [2020-11-29 21:09:04,680 INFO L226 Difference]: Without dead ends: 539 [2020-11-29 21:09:04,681 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 [2020-11-29 21:09:04,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2020-11-29 21:09:04,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2020-11-29 21:09:04,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2020-11-29 21:09:04,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 832 transitions. [2020-11-29 21:09:04,709 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 832 transitions. Word has length 62 [2020-11-29 21:09:04,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:04,709 INFO L481 AbstractCegarLoop]: Abstraction has 539 states and 832 transitions. [2020-11-29 21:09:04,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:04,709 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 832 transitions. [2020-11-29 21:09:04,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-11-29 21:09:04,710 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:04,711 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-29 21:09:04,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-29 21:09:04,711 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:04,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:04,712 INFO L82 PathProgramCache]: Analyzing trace with hash 932372046, now seen corresponding path program 1 times [2020-11-29 21:09:04,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:04,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261365948] [2020-11-29 21:09:04,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:04,751 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 21:09:04,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261365948] [2020-11-29 21:09:04,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:04,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:04,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930055352] [2020-11-29 21:09:04,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:04,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:04,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:04,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:04,754 INFO L87 Difference]: Start difference. First operand 539 states and 832 transitions. Second operand 3 states. [2020-11-29 21:09:04,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:04,939 INFO L93 Difference]: Finished difference Result 1112 states and 1713 transitions. [2020-11-29 21:09:04,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:04,940 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-11-29 21:09:04,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:04,943 INFO L225 Difference]: With dead ends: 1112 [2020-11-29 21:09:04,943 INFO L226 Difference]: Without dead ends: 581 [2020-11-29 21:09:04,946 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 [2020-11-29 21:09:04,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2020-11-29 21:09:04,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 571. [2020-11-29 21:09:04,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-11-29 21:09:04,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 874 transitions. [2020-11-29 21:09:04,971 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 874 transitions. Word has length 62 [2020-11-29 21:09:04,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:04,971 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 874 transitions. [2020-11-29 21:09:04,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:04,972 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 874 transitions. [2020-11-29 21:09:04,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-29 21:09:04,973 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:04,973 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-29 21:09:04,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-29 21:09:04,973 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:04,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:04,974 INFO L82 PathProgramCache]: Analyzing trace with hash -394487435, now seen corresponding path program 1 times [2020-11-29 21:09:04,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:04,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240124941] [2020-11-29 21:09:04,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 21:09:05,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240124941] [2020-11-29 21:09:05,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:05,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:05,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353797415] [2020-11-29 21:09:05,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:05,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:05,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:05,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:05,014 INFO L87 Difference]: Start difference. First operand 571 states and 874 transitions. Second operand 3 states. [2020-11-29 21:09:05,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:05,227 INFO L93 Difference]: Finished difference Result 1144 states and 1750 transitions. [2020-11-29 21:09:05,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:05,228 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-11-29 21:09:05,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:05,231 INFO L225 Difference]: With dead ends: 1144 [2020-11-29 21:09:05,231 INFO L226 Difference]: Without dead ends: 581 [2020-11-29 21:09:05,233 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 [2020-11-29 21:09:05,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2020-11-29 21:09:05,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 571. [2020-11-29 21:09:05,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-11-29 21:09:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 869 transitions. [2020-11-29 21:09:05,258 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 869 transitions. Word has length 63 [2020-11-29 21:09:05,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:05,259 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 869 transitions. [2020-11-29 21:09:05,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 869 transitions. [2020-11-29 21:09:05,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-11-29 21:09:05,260 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:05,260 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] [2020-11-29 21:09:05,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-29 21:09:05,261 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:05,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:05,261 INFO L82 PathProgramCache]: Analyzing trace with hash 408970087, now seen corresponding path program 1 times [2020-11-29 21:09:05,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:05,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792959735] [2020-11-29 21:09:05,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:05,293 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:09:05,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792959735] [2020-11-29 21:09:05,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:05,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:05,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452981211] [2020-11-29 21:09:05,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:05,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:05,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:05,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:05,296 INFO L87 Difference]: Start difference. First operand 571 states and 869 transitions. Second operand 3 states. [2020-11-29 21:09:05,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:05,526 INFO L93 Difference]: Finished difference Result 1181 states and 1794 transitions. [2020-11-29 21:09:05,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:05,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-11-29 21:09:05,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:05,530 INFO L225 Difference]: With dead ends: 1181 [2020-11-29 21:09:05,530 INFO L226 Difference]: Without dead ends: 618 [2020-11-29 21:09:05,532 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 [2020-11-29 21:09:05,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-11-29 21:09:05,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 614. [2020-11-29 21:09:05,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2020-11-29 21:09:05,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 930 transitions. [2020-11-29 21:09:05,561 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 930 transitions. Word has length 74 [2020-11-29 21:09:05,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:05,561 INFO L481 AbstractCegarLoop]: Abstraction has 614 states and 930 transitions. [2020-11-29 21:09:05,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:05,561 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 930 transitions. [2020-11-29 21:09:05,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-11-29 21:09:05,562 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:05,563 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] [2020-11-29 21:09:05,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-29 21:09:05,563 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:05,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:05,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1646674903, now seen corresponding path program 1 times [2020-11-29 21:09:05,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:05,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479201418] [2020-11-29 21:09:05,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:09:05,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479201418] [2020-11-29 21:09:05,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:05,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:05,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108788626] [2020-11-29 21:09:05,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:05,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:05,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:05,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:05,605 INFO L87 Difference]: Start difference. First operand 614 states and 930 transitions. Second operand 3 states. [2020-11-29 21:09:05,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:05,835 INFO L93 Difference]: Finished difference Result 1224 states and 1852 transitions. [2020-11-29 21:09:05,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:05,835 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-11-29 21:09:05,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:05,839 INFO L225 Difference]: With dead ends: 1224 [2020-11-29 21:09:05,839 INFO L226 Difference]: Without dead ends: 618 [2020-11-29 21:09:05,840 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 [2020-11-29 21:09:05,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-11-29 21:09:05,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 614. [2020-11-29 21:09:05,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2020-11-29 21:09:05,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 927 transitions. [2020-11-29 21:09:05,871 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 927 transitions. Word has length 75 [2020-11-29 21:09:05,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:05,872 INFO L481 AbstractCegarLoop]: Abstraction has 614 states and 927 transitions. [2020-11-29 21:09:05,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:05,872 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 927 transitions. [2020-11-29 21:09:05,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-11-29 21:09:05,874 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:05,874 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-11-29 21:09:05,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-29 21:09:05,874 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:05,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:05,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1588112316, now seen corresponding path program 1 times [2020-11-29 21:09:05,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:05,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116590568] [2020-11-29 21:09:05,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-29 21:09:05,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116590568] [2020-11-29 21:09:05,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:05,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:05,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739825991] [2020-11-29 21:09:05,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:05,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:05,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:05,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:05,916 INFO L87 Difference]: Start difference. First operand 614 states and 927 transitions. Second operand 3 states. [2020-11-29 21:09:06,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:06,113 INFO L93 Difference]: Finished difference Result 1256 states and 1895 transitions. [2020-11-29 21:09:06,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:06,114 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-11-29 21:09:06,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:06,118 INFO L225 Difference]: With dead ends: 1256 [2020-11-29 21:09:06,118 INFO L226 Difference]: Without dead ends: 650 [2020-11-29 21:09:06,119 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 [2020-11-29 21:09:06,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2020-11-29 21:09:06,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 642. [2020-11-29 21:09:06,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2020-11-29 21:09:06,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 961 transitions. [2020-11-29 21:09:06,161 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 961 transitions. Word has length 84 [2020-11-29 21:09:06,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:06,162 INFO L481 AbstractCegarLoop]: Abstraction has 642 states and 961 transitions. [2020-11-29 21:09:06,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:06,162 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 961 transitions. [2020-11-29 21:09:06,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-29 21:09:06,163 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:06,164 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-11-29 21:09:06,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-29 21:09:06,164 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:06,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:06,165 INFO L82 PathProgramCache]: Analyzing trace with hash 474906507, now seen corresponding path program 1 times [2020-11-29 21:09:06,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:06,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773532967] [2020-11-29 21:09:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-29 21:09:06,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773532967] [2020-11-29 21:09:06,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:06,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:06,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117176297] [2020-11-29 21:09:06,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:06,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:06,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:06,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:06,198 INFO L87 Difference]: Start difference. First operand 642 states and 961 transitions. Second operand 3 states. [2020-11-29 21:09:06,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:06,390 INFO L93 Difference]: Finished difference Result 1284 states and 1922 transitions. [2020-11-29 21:09:06,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:06,391 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2020-11-29 21:09:06,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:06,395 INFO L225 Difference]: With dead ends: 1284 [2020-11-29 21:09:06,395 INFO L226 Difference]: Without dead ends: 650 [2020-11-29 21:09:06,397 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 [2020-11-29 21:09:06,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2020-11-29 21:09:06,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 642. [2020-11-29 21:09:06,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2020-11-29 21:09:06,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 954 transitions. [2020-11-29 21:09:06,429 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 954 transitions. Word has length 85 [2020-11-29 21:09:06,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:06,429 INFO L481 AbstractCegarLoop]: Abstraction has 642 states and 954 transitions. [2020-11-29 21:09:06,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:06,429 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 954 transitions. [2020-11-29 21:09:06,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-11-29 21:09:06,431 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:06,431 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:09:06,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-29 21:09:06,432 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:06,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:06,432 INFO L82 PathProgramCache]: Analyzing trace with hash -282694335, now seen corresponding path program 1 times [2020-11-29 21:09:06,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:06,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265255331] [2020-11-29 21:09:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:06,464 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-29 21:09:06,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265255331] [2020-11-29 21:09:06,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:06,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:06,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815296415] [2020-11-29 21:09:06,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:06,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:06,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:06,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:06,466 INFO L87 Difference]: Start difference. First operand 642 states and 954 transitions. Second operand 3 states. [2020-11-29 21:09:06,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:06,674 INFO L93 Difference]: Finished difference Result 1316 states and 1949 transitions. [2020-11-29 21:09:06,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:06,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-11-29 21:09:06,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:06,679 INFO L225 Difference]: With dead ends: 1316 [2020-11-29 21:09:06,679 INFO L226 Difference]: Without dead ends: 682 [2020-11-29 21:09:06,680 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 [2020-11-29 21:09:06,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-11-29 21:09:06,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 678. [2020-11-29 21:09:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 678 states. [2020-11-29 21:09:06,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 998 transitions. [2020-11-29 21:09:06,710 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 998 transitions. Word has length 89 [2020-11-29 21:09:06,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:06,711 INFO L481 AbstractCegarLoop]: Abstraction has 678 states and 998 transitions. [2020-11-29 21:09:06,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:06,711 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 998 transitions. [2020-11-29 21:09:06,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-11-29 21:09:06,713 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:06,713 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:09:06,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-29 21:09:06,713 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:06,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:06,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1446327258, now seen corresponding path program 1 times [2020-11-29 21:09:06,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:06,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072467327] [2020-11-29 21:09:06,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-29 21:09:06,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072467327] [2020-11-29 21:09:06,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:06,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:06,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035926146] [2020-11-29 21:09:06,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:06,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:06,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:06,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:06,778 INFO L87 Difference]: Start difference. First operand 678 states and 998 transitions. Second operand 3 states. [2020-11-29 21:09:06,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:06,976 INFO L93 Difference]: Finished difference Result 1352 states and 1988 transitions. [2020-11-29 21:09:06,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:06,978 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2020-11-29 21:09:06,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:06,982 INFO L225 Difference]: With dead ends: 1352 [2020-11-29 21:09:06,982 INFO L226 Difference]: Without dead ends: 682 [2020-11-29 21:09:06,983 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 [2020-11-29 21:09:06,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-11-29 21:09:07,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 678. [2020-11-29 21:09:07,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 678 states. [2020-11-29 21:09:07,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 993 transitions. [2020-11-29 21:09:07,013 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 993 transitions. Word has length 90 [2020-11-29 21:09:07,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:07,013 INFO L481 AbstractCegarLoop]: Abstraction has 678 states and 993 transitions. [2020-11-29 21:09:07,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:07,014 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 993 transitions. [2020-11-29 21:09:07,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-29 21:09:07,015 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:07,016 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:09:07,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-29 21:09:07,016 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:07,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:07,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1209412422, now seen corresponding path program 1 times [2020-11-29 21:09:07,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:07,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062628250] [2020-11-29 21:09:07,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-11-29 21:09:07,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062628250] [2020-11-29 21:09:07,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:07,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:07,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945471982] [2020-11-29 21:09:07,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:07,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:07,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:07,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:07,093 INFO L87 Difference]: Start difference. First operand 678 states and 993 transitions. Second operand 3 states. [2020-11-29 21:09:07,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:07,161 INFO L93 Difference]: Finished difference Result 2004 states and 2929 transitions. [2020-11-29 21:09:07,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:07,162 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2020-11-29 21:09:07,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:07,170 INFO L225 Difference]: With dead ends: 2004 [2020-11-29 21:09:07,170 INFO L226 Difference]: Without dead ends: 1334 [2020-11-29 21:09:07,172 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 [2020-11-29 21:09:07,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2020-11-29 21:09:07,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 680. [2020-11-29 21:09:07,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-11-29 21:09:07,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 995 transitions. [2020-11-29 21:09:07,214 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 995 transitions. Word has length 101 [2020-11-29 21:09:07,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:07,214 INFO L481 AbstractCegarLoop]: Abstraction has 680 states and 995 transitions. [2020-11-29 21:09:07,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:07,215 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 995 transitions. [2020-11-29 21:09:07,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-29 21:09:07,216 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:07,217 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:09:07,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-29 21:09:07,217 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:07,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:07,217 INFO L82 PathProgramCache]: Analyzing trace with hash -70451256, now seen corresponding path program 1 times [2020-11-29 21:09:07,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:07,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387501503] [2020-11-29 21:09:07,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-11-29 21:09:07,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387501503] [2020-11-29 21:09:07,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:07,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:07,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453423189] [2020-11-29 21:09:07,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:07,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:07,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:07,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:07,266 INFO L87 Difference]: Start difference. First operand 680 states and 995 transitions. Second operand 3 states. [2020-11-29 21:09:07,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:07,310 INFO L93 Difference]: Finished difference Result 1363 states and 1993 transitions. [2020-11-29 21:09:07,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:07,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2020-11-29 21:09:07,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:07,315 INFO L225 Difference]: With dead ends: 1363 [2020-11-29 21:09:07,315 INFO L226 Difference]: Without dead ends: 691 [2020-11-29 21:09:07,317 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 [2020-11-29 21:09:07,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2020-11-29 21:09:07,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 678. [2020-11-29 21:09:07,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 678 states. [2020-11-29 21:09:07,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 988 transitions. [2020-11-29 21:09:07,350 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 988 transitions. Word has length 101 [2020-11-29 21:09:07,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:07,351 INFO L481 AbstractCegarLoop]: Abstraction has 678 states and 988 transitions. [2020-11-29 21:09:07,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:07,351 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 988 transitions. [2020-11-29 21:09:07,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-29 21:09:07,353 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:07,353 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:09:07,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-29 21:09:07,353 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:07,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:07,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1334267025, now seen corresponding path program 1 times [2020-11-29 21:09:07,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:07,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244632153] [2020-11-29 21:09:07,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-29 21:09:07,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244632153] [2020-11-29 21:09:07,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:07,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:09:07,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933560596] [2020-11-29 21:09:07,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:09:07,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:07,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:09:07,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:09:07,404 INFO L87 Difference]: Start difference. First operand 678 states and 988 transitions. Second operand 3 states. [2020-11-29 21:09:07,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:07,501 INFO L93 Difference]: Finished difference Result 1989 states and 2896 transitions. [2020-11-29 21:09:07,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:09:07,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 102 [2020-11-29 21:09:07,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:07,509 INFO L225 Difference]: With dead ends: 1989 [2020-11-29 21:09:07,509 INFO L226 Difference]: Without dead ends: 1319 [2020-11-29 21:09:07,511 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 [2020-11-29 21:09:07,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2020-11-29 21:09:07,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1317. [2020-11-29 21:09:07,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1317 states. [2020-11-29 21:09:07,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 1903 transitions. [2020-11-29 21:09:07,574 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 1903 transitions. Word has length 102 [2020-11-29 21:09:07,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:07,574 INFO L481 AbstractCegarLoop]: Abstraction has 1317 states and 1903 transitions. [2020-11-29 21:09:07,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:09:07,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 1903 transitions. [2020-11-29 21:09:07,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-29 21:09:07,577 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:07,577 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:09:07,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-29 21:09:07,577 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:07,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:07,578 INFO L82 PathProgramCache]: Analyzing trace with hash 747461011, now seen corresponding path program 1 times [2020-11-29 21:09:07,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:07,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518992888] [2020-11-29 21:09:07,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:09:07,611 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:09:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:09:07,652 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:09:07,715 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:09:07,715 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 21:09:07,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-29 21:09:07,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 09:09:07 BoogieIcfgContainer [2020-11-29 21:09:07,842 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 21:09:07,843 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 21:09:07,843 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 21:09:07,843 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 21:09:07,843 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:08:59" (3/4) ... [2020-11-29 21:09:07,845 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 21:09:07,928 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_56092ffd-299f-4cbb-9e17-1b75c991e34e/bin/uautomizer/witness.graphml [2020-11-29 21:09:07,928 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 21:09:07,930 INFO L168 Benchmark]: Toolchain (without parser) took 9827.93 ms. Allocated memory was 98.6 MB in the beginning and 209.7 MB in the end (delta: 111.1 MB). Free memory was 76.3 MB in the beginning and 97.2 MB in the end (delta: -20.9 MB). Peak memory consumption was 88.6 MB. Max. memory is 16.1 GB. [2020-11-29 21:09:07,930 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 98.6 MB. Free memory was 62.6 MB in the beginning and 62.6 MB in the end (delta: 64.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:09:07,931 INFO L168 Benchmark]: CACSL2BoogieTranslator took 406.05 ms. Allocated memory is still 98.6 MB. Free memory was 75.9 MB in the beginning and 70.4 MB in the end (delta: 5.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 21:09:07,931 INFO L168 Benchmark]: Boogie Procedure Inliner took 91.37 ms. Allocated memory is still 98.6 MB. Free memory was 70.4 MB in the beginning and 67.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 21:09:07,932 INFO L168 Benchmark]: Boogie Preprocessor took 92.27 ms. Allocated memory is still 98.6 MB. Free memory was 67.4 MB in the beginning and 65.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:09:07,932 INFO L168 Benchmark]: RCFGBuilder took 1085.32 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 65.3 MB in the beginning and 70.5 MB in the end (delta: -5.2 MB). Peak memory consumption was 32.6 MB. Max. memory is 16.1 GB. [2020-11-29 21:09:07,932 INFO L168 Benchmark]: TraceAbstraction took 8059.05 ms. Allocated memory was 119.5 MB in the beginning and 209.7 MB in the end (delta: 90.2 MB). Free memory was 69.9 MB in the beginning and 109.8 MB in the end (delta: -39.9 MB). Peak memory consumption was 51.6 MB. Max. memory is 16.1 GB. [2020-11-29 21:09:07,933 INFO L168 Benchmark]: Witness Printer took 85.68 ms. Allocated memory is still 209.7 MB. Free memory was 109.8 MB in the beginning and 97.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 21:09:07,935 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 98.6 MB. Free memory was 62.6 MB in the beginning and 62.6 MB in the end (delta: 64.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 406.05 ms. Allocated memory is still 98.6 MB. Free memory was 75.9 MB in the beginning and 70.4 MB in the end (delta: 5.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 91.37 ms. Allocated memory is still 98.6 MB. Free memory was 70.4 MB in the beginning and 67.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 92.27 ms. Allocated memory is still 98.6 MB. Free memory was 67.4 MB in the beginning and 65.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1085.32 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 65.3 MB in the beginning and 70.5 MB in the end (delta: -5.2 MB). Peak memory consumption was 32.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8059.05 ms. Allocated memory was 119.5 MB in the beginning and 209.7 MB in the end (delta: 90.2 MB). Free memory was 69.9 MB in the beginning and 109.8 MB in the end (delta: -39.9 MB). Peak memory consumption was 51.6 MB. Max. memory is 16.1 GB. * Witness Printer took 85.68 ms. Allocated memory is still 209.7 MB. Free memory was 109.8 MB in the beginning and 97.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 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: [L649] int s ; [L650] int tmp ; [L654] s = 8464 [L13] int s__info_callback = __VERIFIER_nondet_int() ; [L14] int s__in_handshake = __VERIFIER_nondet_int() ; [L15] int s__state ; [L16] int s__new_session ; [L17] int s__server ; [L18] int s__version = __VERIFIER_nondet_int() ; [L19] int s__type ; [L20] int s__init_num ; [L21] int s__hit = __VERIFIER_nondet_int() ; [L22] int s__rwstate ; [L23] int s__init_buf___0 = 1; [L24] int s__debug = __VERIFIER_nondet_int() ; [L25] int s__shutdown ; [L26] int s__cert = __VERIFIER_nondet_int() ; [L27] int s__options = __VERIFIER_nondet_int() ; [L28] int s__verify_mode = __VERIFIER_nondet_int() ; [L29] int s__session__peer = __VERIFIER_nondet_int() ; [L30] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L31] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L32] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L33] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L34] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L35] int s__s3__tmp__cert_request ; [L36] int s__s3__tmp__reuse_message ; [L37] int s__s3__tmp__use_rsa_tmp ; [L38] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L39] int s__s3__tmp__new_cipher__algorithms ; [L40] int s__s3__tmp__next_state___0 ; [L41] int s__s3__tmp__new_cipher__algo_strength ; [L42] int s__session__cipher ; [L43] int buf ; [L44] unsigned long l ; [L45] unsigned long Time ; [L46] unsigned long tmp ; [L47] int cb ; [L48] long num1 = __VERIFIER_nondet_long() ; [L49] int ret ; [L50] int new_state ; [L51] int state ; [L52] int skip ; [L53] int got_new_session ; [L54] int tmp___1 = __VERIFIER_nondet_int() ; [L55] int tmp___2 = __VERIFIER_nondet_int() ; [L56] int tmp___3 = __VERIFIER_nondet_int() ; [L57] int tmp___4 = __VERIFIER_nondet_int() ; [L58] int tmp___5 = __VERIFIER_nondet_int() ; [L59] int tmp___6 = __VERIFIER_nondet_int() ; [L60] int tmp___7 = __VERIFIER_nondet_int() ; [L61] long tmp___8 = __VERIFIER_nondet_long() ; [L62] int tmp___9 = __VERIFIER_nondet_int() ; [L63] int tmp___10 = __VERIFIER_nondet_int() ; [L64] int blastFlag ; [L65] int __cil_tmp55 ; [L66] unsigned long __cil_tmp56 ; [L67] unsigned long __cil_tmp57 ; [L68] unsigned long __cil_tmp58 ; [L69] unsigned long __cil_tmp59 ; [L70] int __cil_tmp60 ; [L71] unsigned long __cil_tmp61 ; [L74] s__state = initial_state [L75] blastFlag = 0 [L76] tmp = __VERIFIER_nondet_int() [L77] Time = tmp [L78] cb = 0 [L79] ret = -1 [L80] skip = 0 [L81] got_new_session = 0 [L82] COND TRUE s__info_callback != 0 [L83] cb = s__info_callback [L89] s__in_handshake ++ [L90] COND FALSE !(tmp___1 + 12288) [L95] COND FALSE !(s__cert == 0) [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND TRUE s__state == 8464 [L272] s__shutdown = 0 [L273] ret = __VERIFIER_nondet_int() [L274] COND TRUE blastFlag == 0 [L275] blastFlag = 1 [L277] COND FALSE !(ret <= 0) [L280] got_new_session = 1 [L281] s__state = 8496 [L282] s__init_num = 0 [L601] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L602] COND FALSE !(! s__s3__tmp__reuse_message) [L633] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND TRUE s__state == 8496 [L286] ret = __VERIFIER_nondet_int() [L287] COND TRUE blastFlag == 1 [L288] blastFlag = 2 [L290] COND FALSE !(ret <= 0) [L293] COND FALSE !(\read(s__hit)) [L296] s__state = 8512 [L298] s__init_num = 0 [L601] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L602] COND FALSE !(! s__s3__tmp__reuse_message) [L633] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND TRUE s__state == 8512 [L303] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L304] __cil_tmp56 = (unsigned long )s__s3__tmp__new_cipher__algorithms [L305] COND TRUE __cil_tmp56 + 256UL [L306] skip = 1 [L317] s__state = 8528 [L318] s__init_num = 0 [L601] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L602] COND FALSE !(! s__s3__tmp__reuse_message) [L633] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND FALSE !(s__state == 8512) [L144] COND FALSE !(s__state == 8513) [L147] COND TRUE s__state == 8528 [L322] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L323] l = (unsigned long )s__s3__tmp__new_cipher__algorithms [L325] __cil_tmp57 = (unsigned long )s__options [L326] COND TRUE __cil_tmp57 + 2097152UL [L327] s__s3__tmp__use_rsa_tmp = 1 [L332] COND TRUE \read(s__s3__tmp__use_rsa_tmp) [L359] ret = __VERIFIER_nondet_int() [L360] COND FALSE !(blastFlag == 6) [L363] COND FALSE !(ret <= 0) [L380] s__state = 8544 [L381] s__init_num = 0 [L601] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L602] COND TRUE ! s__s3__tmp__reuse_message [L603] COND TRUE ! skip [L604] COND TRUE state == 8528 [L605] COND TRUE s__state == 8544 [L606] COND TRUE tmp___7 != 1024 [L607] COND TRUE tmp___7 != 512 [L608] COND TRUE __cil_tmp58 != 4294967294 [L609] COND TRUE l != 4294967266 [L3] __assert_fail("0", "s3_srvr_13.cil.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 154 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.8s, OverallIterations: 26, TraceHistogramMax: 4, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4418 SDtfs, 4358 SDslu, 1315 SDs, 0 SdLazy, 2050 SolverSat, 916 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1317occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 25 MinimizatonAttempts, 865 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 1523 NumberOfCodeBlocks, 1523 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1396 ConstructedInterpolants, 0 QuantifiedInterpolants, 183768 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 PerfectInterpolantSequences, 646/646 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...