./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 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3f763dfa-8c68-4448-8874-e15680357ed6/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_3f763dfa-8c68-4448-8874-e15680357ed6/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3f763dfa-8c68-4448-8874-e15680357ed6/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3f763dfa-8c68-4448-8874-e15680357ed6/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_srvr_13.cil.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3f763dfa-8c68-4448-8874-e15680357ed6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3f763dfa-8c68-4448-8874-e15680357ed6/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 0.2.0-69874e2 [2020-12-01 15:47:06,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:47:06,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:47:07,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:47:07,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:47:07,052 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:47:07,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:47:07,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:47:07,062 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:47:07,064 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:47:07,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:47:07,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:47:07,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:47:07,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:47:07,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:47:07,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:47:07,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:47:07,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:47:07,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:47:07,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:47:07,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:47:07,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:47:07,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:47:07,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:47:07,098 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:47:07,099 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:47:07,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:47:07,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:47:07,103 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:47:07,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:47:07,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:47:07,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:47:07,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:47:07,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:47:07,112 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:47:07,112 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:47:07,113 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:47:07,114 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:47:07,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:47:07,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:47:07,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:47:07,119 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3f763dfa-8c68-4448-8874-e15680357ed6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 15:47:07,150 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:47:07,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:47:07,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:47:07,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:47:07,153 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:47:07,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:47:07,153 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 15:47:07,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 15:47:07,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 15:47:07,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:47:07,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 15:47:07,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 15:47:07,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 15:47:07,156 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 15:47:07,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 15:47:07,156 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:47:07,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 15:47:07,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:47:07,157 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:47:07,158 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 15:47:07,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 15:47:07,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:47:07,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:47:07,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 15:47:07,159 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 15:47:07,160 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 15:47:07,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 15:47:07,160 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 15:47:07,160 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:47:07,161 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_3f763dfa-8c68-4448-8874-e15680357ed6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_3f763dfa-8c68-4448-8874-e15680357ed6/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 390f2eba6fdf8824b99921adcaaa6cdc728c2d2b [2020-12-01 15:47:07,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:47:07,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:47:07,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:47:07,478 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:47:07,481 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:47:07,482 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3f763dfa-8c68-4448-8874-e15680357ed6/bin/uautomizer/../../sv-benchmarks/c/openssl-simplified/s3_srvr_13.cil.c [2020-12-01 15:47:07,596 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3f763dfa-8c68-4448-8874-e15680357ed6/bin/uautomizer/data/fff228680/6f7dc2e1966e444994b9c4775959f6b2/FLAG28c8fc165 [2020-12-01 15:47:08,366 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:47:08,367 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3f763dfa-8c68-4448-8874-e15680357ed6/sv-benchmarks/c/openssl-simplified/s3_srvr_13.cil.c [2020-12-01 15:47:08,402 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3f763dfa-8c68-4448-8874-e15680357ed6/bin/uautomizer/data/fff228680/6f7dc2e1966e444994b9c4775959f6b2/FLAG28c8fc165 [2020-12-01 15:47:08,657 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3f763dfa-8c68-4448-8874-e15680357ed6/bin/uautomizer/data/fff228680/6f7dc2e1966e444994b9c4775959f6b2 [2020-12-01 15:47:08,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:47:08,662 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 15:47:08,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:47:08,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:47:08,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:47:08,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:47:08" (1/1) ... [2020-12-01 15:47:08,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25671598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:47:08, skipping insertion in model container [2020-12-01 15:47:08,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:47:08" (1/1) ... [2020-12-01 15:47:08,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:47:08,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:47:09,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:47:09,088 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:47:09,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:47:09,220 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:47:09,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:47:09 WrapperNode [2020-12-01 15:47:09,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:47:09,223 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 15:47:09,223 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 15:47:09,223 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 15:47:09,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:47:09" (1/1) ... [2020-12-01 15:47:09,253 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:47:09" (1/1) ... [2020-12-01 15:47:09,317 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 15:47:09,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:47:09,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:47:09,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:47:09,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:47:09" (1/1) ... [2020-12-01 15:47:09,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:47:09" (1/1) ... [2020-12-01 15:47:09,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:47:09" (1/1) ... [2020-12-01 15:47:09,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:47:09" (1/1) ... [2020-12-01 15:47:09,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:47:09" (1/1) ... [2020-12-01 15:47:09,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:47:09" (1/1) ... [2020-12-01 15:47:09,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:47:09" (1/1) ... [2020-12-01 15:47:09,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:47:09,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:47:09,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:47:09,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:47:09,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:47:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f763dfa-8c68-4448-8874-e15680357ed6/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 [2020-12-01 15:47:09,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 15:47:09,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 15:47:09,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:47:09,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:47:09,669 WARN L798 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-01 15:47:10,571 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-12-01 15:47:10,572 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-12-01 15:47:10,586 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:47:10,586 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-01 15:47:10,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:47:10 BoogieIcfgContainer [2020-12-01 15:47:10,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:47:10,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 15:47:10,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 15:47:10,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 15:47:10,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 03:47:08" (1/3) ... [2020-12-01 15:47:10,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14624c7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:47:10, skipping insertion in model container [2020-12-01 15:47:10,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:47:09" (2/3) ... [2020-12-01 15:47:10,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14624c7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:47:10, skipping insertion in model container [2020-12-01 15:47:10,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:47:10" (3/3) ... [2020-12-01 15:47:10,601 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_13.cil.c [2020-12-01 15:47:10,619 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 15:47:10,625 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-01 15:47:10,640 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-01 15:47:10,673 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 15:47:10,673 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 15:47:10,674 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 15:47:10,674 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:47:10,674 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:47:10,674 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 15:47:10,675 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:47:10,675 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 15:47:10,698 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states. [2020-12-01 15:47:10,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-01 15:47:10,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:10,706 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] [2020-12-01 15:47:10,707 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:10,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:10,714 INFO L82 PathProgramCache]: Analyzing trace with hash -651780530, now seen corresponding path program 1 times [2020-12-01 15:47:10,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:10,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103810541] [2020-12-01 15:47:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:47:11,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103810541] [2020-12-01 15:47:11,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:11,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:11,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524501718] [2020-12-01 15:47:11,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:11,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:11,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:11,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:11,143 INFO L87 Difference]: Start difference. First operand 154 states. Second operand 3 states. [2020-12-01 15:47:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:11,588 INFO L93 Difference]: Finished difference Result 326 states and 558 transitions. [2020-12-01 15:47:11,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:11,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-12-01 15:47:11,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:11,626 INFO L225 Difference]: With dead ends: 326 [2020-12-01 15:47:11,631 INFO L226 Difference]: Without dead ends: 160 [2020-12-01 15:47:11,636 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 [2020-12-01 15:47:11,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-01 15:47:11,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2020-12-01 15:47:11,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-01 15:47:11,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 249 transitions. [2020-12-01 15:47:11,742 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 249 transitions. Word has length 26 [2020-12-01 15:47:11,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:11,743 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 249 transitions. [2020-12-01 15:47:11,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:11,743 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 249 transitions. [2020-12-01 15:47:11,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-01 15:47:11,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:11,746 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] [2020-12-01 15:47:11,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 15:47:11,747 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:11,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:11,748 INFO L82 PathProgramCache]: Analyzing trace with hash 490720896, now seen corresponding path program 1 times [2020-12-01 15:47:11,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:11,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428213788] [2020-12-01 15:47:11,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:47:11,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428213788] [2020-12-01 15:47:11,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:11,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:11,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773827796] [2020-12-01 15:47:11,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:11,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:11,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:11,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:11,884 INFO L87 Difference]: Start difference. First operand 158 states and 249 transitions. Second operand 3 states. [2020-12-01 15:47:12,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:12,134 INFO L93 Difference]: Finished difference Result 330 states and 519 transitions. [2020-12-01 15:47:12,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:12,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-01 15:47:12,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:12,137 INFO L225 Difference]: With dead ends: 330 [2020-12-01 15:47:12,138 INFO L226 Difference]: Without dead ends: 180 [2020-12-01 15:47:12,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:12,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-01 15:47:12,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2020-12-01 15:47:12,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-01 15:47:12,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 279 transitions. [2020-12-01 15:47:12,158 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 279 transitions. Word has length 27 [2020-12-01 15:47:12,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:12,159 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 279 transitions. [2020-12-01 15:47:12,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:12,159 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 279 transitions. [2020-12-01 15:47:12,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-01 15:47:12,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:12,163 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] [2020-12-01 15:47:12,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-01 15:47:12,164 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:12,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:12,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1046842997, now seen corresponding path program 1 times [2020-12-01 15:47:12,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:12,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668423196] [2020-12-01 15:47:12,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:47:12,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668423196] [2020-12-01 15:47:12,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:12,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:12,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48579259] [2020-12-01 15:47:12,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:12,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:12,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:12,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:12,239 INFO L87 Difference]: Start difference. First operand 180 states and 279 transitions. Second operand 3 states. [2020-12-01 15:47:12,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:12,483 INFO L93 Difference]: Finished difference Result 360 states and 560 transitions. [2020-12-01 15:47:12,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:12,485 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-01 15:47:12,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:12,491 INFO L225 Difference]: With dead ends: 360 [2020-12-01 15:47:12,492 INFO L226 Difference]: Without dead ends: 188 [2020-12-01 15:47:12,497 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 [2020-12-01 15:47:12,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-01 15:47:12,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2020-12-01 15:47:12,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-01 15:47:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 290 transitions. [2020-12-01 15:47:12,521 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 290 transitions. Word has length 27 [2020-12-01 15:47:12,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:12,522 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 290 transitions. [2020-12-01 15:47:12,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 290 transitions. [2020-12-01 15:47:12,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-01 15:47:12,524 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:12,524 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] [2020-12-01 15:47:12,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-01 15:47:12,525 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:12,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:12,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1631613131, now seen corresponding path program 1 times [2020-12-01 15:47:12,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:12,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725710505] [2020-12-01 15:47:12,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:47:12,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725710505] [2020-12-01 15:47:12,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:12,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:12,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333981640] [2020-12-01 15:47:12,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:12,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:12,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:12,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:12,625 INFO L87 Difference]: Start difference. First operand 186 states and 290 transitions. Second operand 3 states. [2020-12-01 15:47:12,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:12,863 INFO L93 Difference]: Finished difference Result 365 states and 570 transitions. [2020-12-01 15:47:12,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:12,864 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-01 15:47:12,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:12,868 INFO L225 Difference]: With dead ends: 365 [2020-12-01 15:47:12,868 INFO L226 Difference]: Without dead ends: 187 [2020-12-01 15:47:12,871 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 [2020-12-01 15:47:12,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-01 15:47:12,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2020-12-01 15:47:12,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-01 15:47:12,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 291 transitions. [2020-12-01 15:47:12,911 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 291 transitions. Word has length 27 [2020-12-01 15:47:12,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:12,912 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 291 transitions. [2020-12-01 15:47:12,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:12,912 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 291 transitions. [2020-12-01 15:47:12,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-01 15:47:12,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:12,915 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] [2020-12-01 15:47:12,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-01 15:47:12,916 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:12,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:12,916 INFO L82 PathProgramCache]: Analyzing trace with hash -431278894, now seen corresponding path program 1 times [2020-12-01 15:47:12,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:12,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598748673] [2020-12-01 15:47:12,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:47:12,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598748673] [2020-12-01 15:47:12,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:12,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:12,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137554695] [2020-12-01 15:47:12,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:12,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:12,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:12,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:12,981 INFO L87 Difference]: Start difference. First operand 187 states and 291 transitions. Second operand 3 states. [2020-12-01 15:47:13,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:13,176 INFO L93 Difference]: Finished difference Result 376 states and 582 transitions. [2020-12-01 15:47:13,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:13,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-12-01 15:47:13,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:13,179 INFO L225 Difference]: With dead ends: 376 [2020-12-01 15:47:13,180 INFO L226 Difference]: Without dead ends: 197 [2020-12-01 15:47:13,180 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 [2020-12-01 15:47:13,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-01 15:47:13,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 187. [2020-12-01 15:47:13,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-01 15:47:13,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 289 transitions. [2020-12-01 15:47:13,206 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 289 transitions. Word has length 28 [2020-12-01 15:47:13,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:13,207 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 289 transitions. [2020-12-01 15:47:13,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:13,207 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 289 transitions. [2020-12-01 15:47:13,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-01 15:47:13,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:13,212 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] [2020-12-01 15:47:13,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-01 15:47:13,212 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:13,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:13,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1682017785, now seen corresponding path program 1 times [2020-12-01 15:47:13,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:13,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808745509] [2020-12-01 15:47:13,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:13,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:47:13,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808745509] [2020-12-01 15:47:13,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:13,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:13,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573516999] [2020-12-01 15:47:13,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:13,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:13,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:13,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:13,311 INFO L87 Difference]: Start difference. First operand 187 states and 289 transitions. Second operand 3 states. [2020-12-01 15:47:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:13,494 INFO L93 Difference]: Finished difference Result 376 states and 578 transitions. [2020-12-01 15:47:13,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:13,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-12-01 15:47:13,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:13,496 INFO L225 Difference]: With dead ends: 376 [2020-12-01 15:47:13,497 INFO L226 Difference]: Without dead ends: 197 [2020-12-01 15:47:13,497 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 [2020-12-01 15:47:13,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-01 15:47:13,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 187. [2020-12-01 15:47:13,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-01 15:47:13,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 287 transitions. [2020-12-01 15:47:13,515 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 287 transitions. Word has length 29 [2020-12-01 15:47:13,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:13,516 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 287 transitions. [2020-12-01 15:47:13,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:13,516 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 287 transitions. [2020-12-01 15:47:13,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-01 15:47:13,521 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:13,522 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] [2020-12-01 15:47:13,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-01 15:47:13,522 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:13,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:13,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1452653961, now seen corresponding path program 1 times [2020-12-01 15:47:13,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:13,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511312947] [2020-12-01 15:47:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:47:13,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511312947] [2020-12-01 15:47:13,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:13,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:13,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910635563] [2020-12-01 15:47:13,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:13,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:13,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:13,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:13,603 INFO L87 Difference]: Start difference. First operand 187 states and 287 transitions. Second operand 3 states. [2020-12-01 15:47:13,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:13,786 INFO L93 Difference]: Finished difference Result 376 states and 574 transitions. [2020-12-01 15:47:13,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:13,788 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-01 15:47:13,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:13,790 INFO L225 Difference]: With dead ends: 376 [2020-12-01 15:47:13,790 INFO L226 Difference]: Without dead ends: 197 [2020-12-01 15:47:13,792 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 [2020-12-01 15:47:13,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-01 15:47:13,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 187. [2020-12-01 15:47:13,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-01 15:47:13,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 285 transitions. [2020-12-01 15:47:13,807 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 285 transitions. Word has length 30 [2020-12-01 15:47:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:13,810 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 285 transitions. [2020-12-01 15:47:13,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:13,811 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 285 transitions. [2020-12-01 15:47:13,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-01 15:47:13,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:13,812 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] [2020-12-01 15:47:13,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-01 15:47:13,812 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:13,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:13,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1026970664, now seen corresponding path program 1 times [2020-12-01 15:47:13,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:13,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822271095] [2020-12-01 15:47:13,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:47:13,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822271095] [2020-12-01 15:47:13,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:13,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 15:47:13,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730439311] [2020-12-01 15:47:13,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 15:47:13,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:13,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 15:47:13,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:47:13,925 INFO L87 Difference]: Start difference. First operand 187 states and 285 transitions. Second operand 4 states. [2020-12-01 15:47:14,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:14,333 INFO L93 Difference]: Finished difference Result 572 states and 871 transitions. [2020-12-01 15:47:14,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-01 15:47:14,334 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-12-01 15:47:14,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:14,339 INFO L225 Difference]: With dead ends: 572 [2020-12-01 15:47:14,339 INFO L226 Difference]: Without dead ends: 393 [2020-12-01 15:47:14,340 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 [2020-12-01 15:47:14,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-12-01 15:47:14,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 357. [2020-12-01 15:47:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-12-01 15:47:14,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 543 transitions. [2020-12-01 15:47:14,368 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 543 transitions. Word has length 30 [2020-12-01 15:47:14,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:14,368 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 543 transitions. [2020-12-01 15:47:14,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 15:47:14,369 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 543 transitions. [2020-12-01 15:47:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-01 15:47:14,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:14,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:47:14,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-01 15:47:14,371 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:14,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:14,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1801233473, now seen corresponding path program 1 times [2020-12-01 15:47:14,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:14,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075461011] [2020-12-01 15:47:14,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:47:14,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075461011] [2020-12-01 15:47:14,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:14,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:14,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456533476] [2020-12-01 15:47:14,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:14,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:14,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:14,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:14,480 INFO L87 Difference]: Start difference. First operand 357 states and 543 transitions. Second operand 3 states. [2020-12-01 15:47:14,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:14,732 INFO L93 Difference]: Finished difference Result 781 states and 1197 transitions. [2020-12-01 15:47:14,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:14,733 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-12-01 15:47:14,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:14,737 INFO L225 Difference]: With dead ends: 781 [2020-12-01 15:47:14,737 INFO L226 Difference]: Without dead ends: 432 [2020-12-01 15:47:14,739 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 [2020-12-01 15:47:14,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-12-01 15:47:14,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 412. [2020-12-01 15:47:14,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-12-01 15:47:14,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 630 transitions. [2020-12-01 15:47:14,764 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 630 transitions. Word has length 33 [2020-12-01 15:47:14,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:14,765 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 630 transitions. [2020-12-01 15:47:14,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:14,766 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 630 transitions. [2020-12-01 15:47:14,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-01 15:47:14,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:14,768 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] [2020-12-01 15:47:14,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-01 15:47:14,768 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:14,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:14,770 INFO L82 PathProgramCache]: Analyzing trace with hash -979083784, now seen corresponding path program 1 times [2020-12-01 15:47:14,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:14,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684228423] [2020-12-01 15:47:14,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:47:14,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684228423] [2020-12-01 15:47:14,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:14,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:14,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636152110] [2020-12-01 15:47:14,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:14,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:14,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:14,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:14,838 INFO L87 Difference]: Start difference. First operand 412 states and 630 transitions. Second operand 3 states. [2020-12-01 15:47:15,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:15,079 INFO L93 Difference]: Finished difference Result 858 states and 1321 transitions. [2020-12-01 15:47:15,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:15,080 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-12-01 15:47:15,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:15,085 INFO L225 Difference]: With dead ends: 858 [2020-12-01 15:47:15,085 INFO L226 Difference]: Without dead ends: 454 [2020-12-01 15:47:15,087 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 [2020-12-01 15:47:15,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-12-01 15:47:15,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 434. [2020-12-01 15:47:15,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2020-12-01 15:47:15,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 670 transitions. [2020-12-01 15:47:15,114 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 670 transitions. Word has length 34 [2020-12-01 15:47:15,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:15,115 INFO L481 AbstractCegarLoop]: Abstraction has 434 states and 670 transitions. [2020-12-01 15:47:15,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:15,115 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 670 transitions. [2020-12-01 15:47:15,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-01 15:47:15,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:15,117 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] [2020-12-01 15:47:15,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-01 15:47:15,117 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:15,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:15,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1380253332, now seen corresponding path program 1 times [2020-12-01 15:47:15,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:15,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257726201] [2020-12-01 15:47:15,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:15,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:47:15,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257726201] [2020-12-01 15:47:15,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:15,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:15,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697755248] [2020-12-01 15:47:15,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:15,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:15,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:15,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:15,180 INFO L87 Difference]: Start difference. First operand 434 states and 670 transitions. Second operand 3 states. [2020-12-01 15:47:15,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:15,460 INFO L93 Difference]: Finished difference Result 925 states and 1433 transitions. [2020-12-01 15:47:15,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:15,461 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-01 15:47:15,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:15,465 INFO L225 Difference]: With dead ends: 925 [2020-12-01 15:47:15,466 INFO L226 Difference]: Without dead ends: 499 [2020-12-01 15:47:15,467 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 [2020-12-01 15:47:15,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-12-01 15:47:15,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 489. [2020-12-01 15:47:15,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-12-01 15:47:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 760 transitions. [2020-12-01 15:47:15,496 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 760 transitions. Word has length 40 [2020-12-01 15:47:15,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:15,497 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 760 transitions. [2020-12-01 15:47:15,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:15,497 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 760 transitions. [2020-12-01 15:47:15,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-01 15:47:15,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:15,499 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] [2020-12-01 15:47:15,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-01 15:47:15,499 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:15,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:15,500 INFO L82 PathProgramCache]: Analyzing trace with hash -168828106, now seen corresponding path program 1 times [2020-12-01 15:47:15,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:15,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314352514] [2020-12-01 15:47:15,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:47:15,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314352514] [2020-12-01 15:47:15,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:15,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:15,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609899321] [2020-12-01 15:47:15,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:15,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:15,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:15,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:15,568 INFO L87 Difference]: Start difference. First operand 489 states and 760 transitions. Second operand 3 states. [2020-12-01 15:47:15,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:15,841 INFO L93 Difference]: Finished difference Result 992 states and 1545 transitions. [2020-12-01 15:47:15,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:15,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-01 15:47:15,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:15,847 INFO L225 Difference]: With dead ends: 992 [2020-12-01 15:47:15,847 INFO L226 Difference]: Without dead ends: 511 [2020-12-01 15:47:15,849 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 [2020-12-01 15:47:15,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2020-12-01 15:47:15,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 501. [2020-12-01 15:47:15,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2020-12-01 15:47:15,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 782 transitions. [2020-12-01 15:47:15,880 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 782 transitions. Word has length 41 [2020-12-01 15:47:15,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:15,881 INFO L481 AbstractCegarLoop]: Abstraction has 501 states and 782 transitions. [2020-12-01 15:47:15,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:15,881 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 782 transitions. [2020-12-01 15:47:15,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-01 15:47:15,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:15,883 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] [2020-12-01 15:47:15,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-01 15:47:15,884 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:15,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:15,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2051620392, now seen corresponding path program 1 times [2020-12-01 15:47:15,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:15,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536508227] [2020-12-01 15:47:15,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:47:15,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536508227] [2020-12-01 15:47:15,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:15,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:15,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646260043] [2020-12-01 15:47:15,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:15,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:15,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:15,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:15,991 INFO L87 Difference]: Start difference. First operand 501 states and 782 transitions. Second operand 3 states. [2020-12-01 15:47:16,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:16,226 INFO L93 Difference]: Finished difference Result 1008 states and 1575 transitions. [2020-12-01 15:47:16,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:16,227 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-01 15:47:16,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:16,232 INFO L225 Difference]: With dead ends: 1008 [2020-12-01 15:47:16,232 INFO L226 Difference]: Without dead ends: 515 [2020-12-01 15:47:16,233 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 [2020-12-01 15:47:16,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2020-12-01 15:47:16,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 501. [2020-12-01 15:47:16,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2020-12-01 15:47:16,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 778 transitions. [2020-12-01 15:47:16,263 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 778 transitions. Word has length 61 [2020-12-01 15:47:16,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:16,264 INFO L481 AbstractCegarLoop]: Abstraction has 501 states and 778 transitions. [2020-12-01 15:47:16,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:16,265 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 778 transitions. [2020-12-01 15:47:16,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-01 15:47:16,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:16,267 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] [2020-12-01 15:47:16,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-01 15:47:16,267 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:16,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:16,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1852313784, now seen corresponding path program 1 times [2020-12-01 15:47:16,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:16,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504274459] [2020-12-01 15:47:16,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:47:16,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504274459] [2020-12-01 15:47:16,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:16,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:16,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709770600] [2020-12-01 15:47:16,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:16,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:16,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:16,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:16,345 INFO L87 Difference]: Start difference. First operand 501 states and 778 transitions. Second operand 3 states. [2020-12-01 15:47:16,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:16,610 INFO L93 Difference]: Finished difference Result 1032 states and 1601 transitions. [2020-12-01 15:47:16,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:16,611 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-01 15:47:16,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:16,615 INFO L225 Difference]: With dead ends: 1032 [2020-12-01 15:47:16,616 INFO L226 Difference]: Without dead ends: 539 [2020-12-01 15:47:16,618 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 [2020-12-01 15:47:16,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2020-12-01 15:47:16,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2020-12-01 15:47:16,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2020-12-01 15:47:16,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 832 transitions. [2020-12-01 15:47:16,654 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 832 transitions. Word has length 62 [2020-12-01 15:47:16,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:16,655 INFO L481 AbstractCegarLoop]: Abstraction has 539 states and 832 transitions. [2020-12-01 15:47:16,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:16,655 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 832 transitions. [2020-12-01 15:47:16,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-01 15:47:16,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:16,657 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] [2020-12-01 15:47:16,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-01 15:47:16,658 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:16,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:16,659 INFO L82 PathProgramCache]: Analyzing trace with hash 932372046, now seen corresponding path program 1 times [2020-12-01 15:47:16,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:16,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993521080] [2020-12-01 15:47:16,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-01 15:47:16,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993521080] [2020-12-01 15:47:16,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:16,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:16,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006003559] [2020-12-01 15:47:16,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:16,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:16,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:16,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:16,722 INFO L87 Difference]: Start difference. First operand 539 states and 832 transitions. Second operand 3 states. [2020-12-01 15:47:16,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:16,949 INFO L93 Difference]: Finished difference Result 1112 states and 1713 transitions. [2020-12-01 15:47:16,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:16,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-01 15:47:16,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:16,955 INFO L225 Difference]: With dead ends: 1112 [2020-12-01 15:47:16,955 INFO L226 Difference]: Without dead ends: 581 [2020-12-01 15:47:16,959 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 [2020-12-01 15:47:16,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2020-12-01 15:47:16,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 571. [2020-12-01 15:47:16,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-12-01 15:47:16,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 874 transitions. [2020-12-01 15:47:16,992 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 874 transitions. Word has length 62 [2020-12-01 15:47:16,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:16,993 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 874 transitions. [2020-12-01 15:47:16,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:16,993 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 874 transitions. [2020-12-01 15:47:16,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-01 15:47:16,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:16,995 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] [2020-12-01 15:47:16,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-01 15:47:16,995 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:16,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:16,996 INFO L82 PathProgramCache]: Analyzing trace with hash -394487435, now seen corresponding path program 1 times [2020-12-01 15:47:16,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:16,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220666047] [2020-12-01 15:47:16,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-01 15:47:17,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220666047] [2020-12-01 15:47:17,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:17,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:17,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611378141] [2020-12-01 15:47:17,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:17,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:17,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:17,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:17,046 INFO L87 Difference]: Start difference. First operand 571 states and 874 transitions. Second operand 3 states. [2020-12-01 15:47:17,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:17,284 INFO L93 Difference]: Finished difference Result 1144 states and 1750 transitions. [2020-12-01 15:47:17,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:17,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-01 15:47:17,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:17,289 INFO L225 Difference]: With dead ends: 1144 [2020-12-01 15:47:17,289 INFO L226 Difference]: Without dead ends: 581 [2020-12-01 15:47:17,290 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 [2020-12-01 15:47:17,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2020-12-01 15:47:17,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 571. [2020-12-01 15:47:17,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-12-01 15:47:17,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 869 transitions. [2020-12-01 15:47:17,323 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 869 transitions. Word has length 63 [2020-12-01 15:47:17,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:17,324 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 869 transitions. [2020-12-01 15:47:17,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:17,324 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 869 transitions. [2020-12-01 15:47:17,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-01 15:47:17,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:17,329 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] [2020-12-01 15:47:17,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-01 15:47:17,329 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:17,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:17,330 INFO L82 PathProgramCache]: Analyzing trace with hash 408970087, now seen corresponding path program 1 times [2020-12-01 15:47:17,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:17,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499000137] [2020-12-01 15:47:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:47:17,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499000137] [2020-12-01 15:47:17,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:17,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:17,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548279463] [2020-12-01 15:47:17,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:17,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:17,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:17,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:17,379 INFO L87 Difference]: Start difference. First operand 571 states and 869 transitions. Second operand 3 states. [2020-12-01 15:47:17,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:17,642 INFO L93 Difference]: Finished difference Result 1181 states and 1794 transitions. [2020-12-01 15:47:17,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:17,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-01 15:47:17,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:17,647 INFO L225 Difference]: With dead ends: 1181 [2020-12-01 15:47:17,647 INFO L226 Difference]: Without dead ends: 618 [2020-12-01 15:47:17,649 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 [2020-12-01 15:47:17,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-12-01 15:47:17,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 614. [2020-12-01 15:47:17,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2020-12-01 15:47:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 930 transitions. [2020-12-01 15:47:17,685 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 930 transitions. Word has length 74 [2020-12-01 15:47:17,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:17,686 INFO L481 AbstractCegarLoop]: Abstraction has 614 states and 930 transitions. [2020-12-01 15:47:17,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 930 transitions. [2020-12-01 15:47:17,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-01 15:47:17,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:17,692 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] [2020-12-01 15:47:17,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-01 15:47:17,693 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:17,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:17,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1646674903, now seen corresponding path program 1 times [2020-12-01 15:47:17,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:17,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187977385] [2020-12-01 15:47:17,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:47:17,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187977385] [2020-12-01 15:47:17,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:17,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:17,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350391055] [2020-12-01 15:47:17,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:17,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:17,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:17,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:17,765 INFO L87 Difference]: Start difference. First operand 614 states and 930 transitions. Second operand 3 states. [2020-12-01 15:47:18,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:18,039 INFO L93 Difference]: Finished difference Result 1224 states and 1852 transitions. [2020-12-01 15:47:18,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:18,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-01 15:47:18,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:18,045 INFO L225 Difference]: With dead ends: 1224 [2020-12-01 15:47:18,045 INFO L226 Difference]: Without dead ends: 618 [2020-12-01 15:47:18,047 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 [2020-12-01 15:47:18,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-12-01 15:47:18,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 614. [2020-12-01 15:47:18,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2020-12-01 15:47:18,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 927 transitions. [2020-12-01 15:47:18,085 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 927 transitions. Word has length 75 [2020-12-01 15:47:18,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:18,086 INFO L481 AbstractCegarLoop]: Abstraction has 614 states and 927 transitions. [2020-12-01 15:47:18,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:18,086 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 927 transitions. [2020-12-01 15:47:18,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-01 15:47:18,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:18,089 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] [2020-12-01 15:47:18,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-01 15:47:18,089 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:18,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:18,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1588112316, now seen corresponding path program 1 times [2020-12-01 15:47:18,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:18,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853829493] [2020-12-01 15:47:18,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-01 15:47:18,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853829493] [2020-12-01 15:47:18,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:18,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:18,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708267628] [2020-12-01 15:47:18,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:18,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:18,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:18,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:18,140 INFO L87 Difference]: Start difference. First operand 614 states and 927 transitions. Second operand 3 states. [2020-12-01 15:47:18,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:18,375 INFO L93 Difference]: Finished difference Result 1256 states and 1895 transitions. [2020-12-01 15:47:18,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:18,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-12-01 15:47:18,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:18,381 INFO L225 Difference]: With dead ends: 1256 [2020-12-01 15:47:18,382 INFO L226 Difference]: Without dead ends: 650 [2020-12-01 15:47:18,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:18,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2020-12-01 15:47:18,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 642. [2020-12-01 15:47:18,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2020-12-01 15:47:18,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 961 transitions. [2020-12-01 15:47:18,419 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 961 transitions. Word has length 84 [2020-12-01 15:47:18,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:18,419 INFO L481 AbstractCegarLoop]: Abstraction has 642 states and 961 transitions. [2020-12-01 15:47:18,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:18,420 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 961 transitions. [2020-12-01 15:47:18,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-01 15:47:18,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:18,422 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] [2020-12-01 15:47:18,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-01 15:47:18,423 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:18,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:18,424 INFO L82 PathProgramCache]: Analyzing trace with hash 474906507, now seen corresponding path program 1 times [2020-12-01 15:47:18,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:18,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150804360] [2020-12-01 15:47:18,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-01 15:47:18,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150804360] [2020-12-01 15:47:18,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:18,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:18,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969494204] [2020-12-01 15:47:18,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:18,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:18,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:18,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:18,474 INFO L87 Difference]: Start difference. First operand 642 states and 961 transitions. Second operand 3 states. [2020-12-01 15:47:18,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:18,705 INFO L93 Difference]: Finished difference Result 1284 states and 1922 transitions. [2020-12-01 15:47:18,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:18,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2020-12-01 15:47:18,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:18,710 INFO L225 Difference]: With dead ends: 1284 [2020-12-01 15:47:18,711 INFO L226 Difference]: Without dead ends: 650 [2020-12-01 15:47:18,713 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 [2020-12-01 15:47:18,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2020-12-01 15:47:18,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 642. [2020-12-01 15:47:18,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2020-12-01 15:47:18,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 954 transitions. [2020-12-01 15:47:18,749 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 954 transitions. Word has length 85 [2020-12-01 15:47:18,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:18,749 INFO L481 AbstractCegarLoop]: Abstraction has 642 states and 954 transitions. [2020-12-01 15:47:18,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:18,750 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 954 transitions. [2020-12-01 15:47:18,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-01 15:47:18,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:18,752 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] [2020-12-01 15:47:18,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-01 15:47:18,753 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:18,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:18,754 INFO L82 PathProgramCache]: Analyzing trace with hash -282694335, now seen corresponding path program 1 times [2020-12-01 15:47:18,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:18,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261907926] [2020-12-01 15:47:18,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-01 15:47:18,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261907926] [2020-12-01 15:47:18,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:18,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:18,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929535064] [2020-12-01 15:47:18,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:18,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:18,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:18,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:18,828 INFO L87 Difference]: Start difference. First operand 642 states and 954 transitions. Second operand 3 states. [2020-12-01 15:47:19,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:19,101 INFO L93 Difference]: Finished difference Result 1316 states and 1949 transitions. [2020-12-01 15:47:19,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:19,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-12-01 15:47:19,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:19,107 INFO L225 Difference]: With dead ends: 1316 [2020-12-01 15:47:19,107 INFO L226 Difference]: Without dead ends: 682 [2020-12-01 15:47:19,109 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 [2020-12-01 15:47:19,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-12-01 15:47:19,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 678. [2020-12-01 15:47:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 678 states. [2020-12-01 15:47:19,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 998 transitions. [2020-12-01 15:47:19,145 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 998 transitions. Word has length 89 [2020-12-01 15:47:19,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:19,146 INFO L481 AbstractCegarLoop]: Abstraction has 678 states and 998 transitions. [2020-12-01 15:47:19,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:19,146 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 998 transitions. [2020-12-01 15:47:19,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-01 15:47:19,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:19,149 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] [2020-12-01 15:47:19,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-01 15:47:19,149 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:19,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:19,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1446327258, now seen corresponding path program 1 times [2020-12-01 15:47:19,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:19,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698807444] [2020-12-01 15:47:19,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-01 15:47:19,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698807444] [2020-12-01 15:47:19,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:19,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:19,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480903771] [2020-12-01 15:47:19,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:19,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:19,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:19,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:19,194 INFO L87 Difference]: Start difference. First operand 678 states and 998 transitions. Second operand 3 states. [2020-12-01 15:47:19,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:19,439 INFO L93 Difference]: Finished difference Result 1352 states and 1988 transitions. [2020-12-01 15:47:19,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:19,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2020-12-01 15:47:19,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:19,445 INFO L225 Difference]: With dead ends: 1352 [2020-12-01 15:47:19,446 INFO L226 Difference]: Without dead ends: 682 [2020-12-01 15:47:19,449 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 [2020-12-01 15:47:19,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-12-01 15:47:19,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 678. [2020-12-01 15:47:19,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 678 states. [2020-12-01 15:47:19,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 993 transitions. [2020-12-01 15:47:19,491 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 993 transitions. Word has length 90 [2020-12-01 15:47:19,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:19,491 INFO L481 AbstractCegarLoop]: Abstraction has 678 states and 993 transitions. [2020-12-01 15:47:19,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:19,492 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 993 transitions. [2020-12-01 15:47:19,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-01 15:47:19,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:19,494 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] [2020-12-01 15:47:19,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-01 15:47:19,495 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:19,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:19,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1209412422, now seen corresponding path program 1 times [2020-12-01 15:47:19,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:19,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948500651] [2020-12-01 15:47:19,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-12-01 15:47:19,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948500651] [2020-12-01 15:47:19,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:19,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:19,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461002462] [2020-12-01 15:47:19,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:19,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:19,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:19,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:19,600 INFO L87 Difference]: Start difference. First operand 678 states and 993 transitions. Second operand 3 states. [2020-12-01 15:47:19,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:19,667 INFO L93 Difference]: Finished difference Result 2004 states and 2929 transitions. [2020-12-01 15:47:19,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:19,668 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2020-12-01 15:47:19,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:19,678 INFO L225 Difference]: With dead ends: 2004 [2020-12-01 15:47:19,678 INFO L226 Difference]: Without dead ends: 1334 [2020-12-01 15:47:19,680 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 [2020-12-01 15:47:19,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2020-12-01 15:47:19,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 680. [2020-12-01 15:47:19,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-12-01 15:47:19,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 995 transitions. [2020-12-01 15:47:19,728 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 995 transitions. Word has length 101 [2020-12-01 15:47:19,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:19,729 INFO L481 AbstractCegarLoop]: Abstraction has 680 states and 995 transitions. [2020-12-01 15:47:19,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:19,729 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 995 transitions. [2020-12-01 15:47:19,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-01 15:47:19,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:19,731 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] [2020-12-01 15:47:19,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-01 15:47:19,732 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:19,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:19,733 INFO L82 PathProgramCache]: Analyzing trace with hash -70451256, now seen corresponding path program 1 times [2020-12-01 15:47:19,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:19,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972211837] [2020-12-01 15:47:19,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-12-01 15:47:19,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972211837] [2020-12-01 15:47:19,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:19,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:19,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149135673] [2020-12-01 15:47:19,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:19,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:19,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:19,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:19,787 INFO L87 Difference]: Start difference. First operand 680 states and 995 transitions. Second operand 3 states. [2020-12-01 15:47:19,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:19,842 INFO L93 Difference]: Finished difference Result 1363 states and 1993 transitions. [2020-12-01 15:47:19,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:19,843 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2020-12-01 15:47:19,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:19,848 INFO L225 Difference]: With dead ends: 1363 [2020-12-01 15:47:19,849 INFO L226 Difference]: Without dead ends: 691 [2020-12-01 15:47:19,850 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 [2020-12-01 15:47:19,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2020-12-01 15:47:19,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 678. [2020-12-01 15:47:19,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 678 states. [2020-12-01 15:47:19,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 988 transitions. [2020-12-01 15:47:19,891 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 988 transitions. Word has length 101 [2020-12-01 15:47:19,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:19,892 INFO L481 AbstractCegarLoop]: Abstraction has 678 states and 988 transitions. [2020-12-01 15:47:19,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:19,892 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 988 transitions. [2020-12-01 15:47:19,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-01 15:47:19,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:19,895 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] [2020-12-01 15:47:19,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-01 15:47:19,895 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:19,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:19,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1334267025, now seen corresponding path program 1 times [2020-12-01 15:47:19,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:19,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836988770] [2020-12-01 15:47:19,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:47:19,976 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-01 15:47:19,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836988770] [2020-12-01 15:47:19,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:47:19,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:47:19,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586341889] [2020-12-01 15:47:19,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:47:19,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:47:19,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:47:19,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:47:19,979 INFO L87 Difference]: Start difference. First operand 678 states and 988 transitions. Second operand 3 states. [2020-12-01 15:47:20,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:47:20,097 INFO L93 Difference]: Finished difference Result 1989 states and 2896 transitions. [2020-12-01 15:47:20,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:47:20,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 102 [2020-12-01 15:47:20,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:47:20,109 INFO L225 Difference]: With dead ends: 1989 [2020-12-01 15:47:20,109 INFO L226 Difference]: Without dead ends: 1319 [2020-12-01 15:47:20,111 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 [2020-12-01 15:47:20,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2020-12-01 15:47:20,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1317. [2020-12-01 15:47:20,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1317 states. [2020-12-01 15:47:20,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 1903 transitions. [2020-12-01 15:47:20,189 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 1903 transitions. Word has length 102 [2020-12-01 15:47:20,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:47:20,189 INFO L481 AbstractCegarLoop]: Abstraction has 1317 states and 1903 transitions. [2020-12-01 15:47:20,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:47:20,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 1903 transitions. [2020-12-01 15:47:20,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-01 15:47:20,193 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:47:20,193 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] [2020-12-01 15:47:20,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-01 15:47:20,195 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:47:20,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:47:20,196 INFO L82 PathProgramCache]: Analyzing trace with hash 747461011, now seen corresponding path program 1 times [2020-12-01 15:47:20,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:47:20,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865681048] [2020-12-01 15:47:20,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:47:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:47:20,243 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:47:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:47:20,285 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:47:20,369 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:47:20,370 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 15:47:20,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-01 15:47:20,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 03:47:20 BoogieIcfgContainer [2020-12-01 15:47:20,547 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 15:47:20,548 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:47:20,548 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:47:20,548 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:47:20,548 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:47:10" (3/4) ... [2020-12-01 15:47:20,551 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 15:47:20,704 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3f763dfa-8c68-4448-8874-e15680357ed6/bin/uautomizer/witness.graphml [2020-12-01 15:47:20,704 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:47:20,707 INFO L168 Benchmark]: Toolchain (without parser) took 12043.05 ms. Allocated memory was 100.7 MB in the beginning and 197.1 MB in the end (delta: 96.5 MB). Free memory was 72.3 MB in the beginning and 71.7 MB in the end (delta: 542.9 kB). Peak memory consumption was 97.8 MB. Max. memory is 16.1 GB. [2020-12-01 15:47:20,708 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 77.6 MB. Free memory was 37.5 MB in the beginning and 37.4 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:47:20,708 INFO L168 Benchmark]: CACSL2BoogieTranslator took 557.00 ms. Allocated memory is still 100.7 MB. Free memory was 72.1 MB in the beginning and 73.6 MB in the end (delta: -1.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-01 15:47:20,709 INFO L168 Benchmark]: Boogie Procedure Inliner took 94.38 ms. Allocated memory is still 100.7 MB. Free memory was 73.6 MB in the beginning and 70.3 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-01 15:47:20,710 INFO L168 Benchmark]: Boogie Preprocessor took 90.15 ms. Allocated memory is still 100.7 MB. Free memory was 70.3 MB in the beginning and 68.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:47:20,710 INFO L168 Benchmark]: RCFGBuilder took 1180.30 ms. Allocated memory is still 100.7 MB. Free memory was 68.2 MB in the beginning and 48.6 MB in the end (delta: 19.6 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2020-12-01 15:47:20,711 INFO L168 Benchmark]: TraceAbstraction took 9956.09 ms. Allocated memory was 100.7 MB in the beginning and 197.1 MB in the end (delta: 96.5 MB). Free memory was 48.1 MB in the beginning and 84.4 MB in the end (delta: -36.3 MB). Peak memory consumption was 61.7 MB. Max. memory is 16.1 GB. [2020-12-01 15:47:20,711 INFO L168 Benchmark]: Witness Printer took 156.62 ms. Allocated memory is still 197.1 MB. Free memory was 84.4 MB in the beginning and 71.7 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-01 15:47:20,714 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 77.6 MB. Free memory was 37.5 MB in the beginning and 37.4 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 557.00 ms. Allocated memory is still 100.7 MB. Free memory was 72.1 MB in the beginning and 73.6 MB in the end (delta: -1.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 94.38 ms. Allocated memory is still 100.7 MB. Free memory was 73.6 MB in the beginning and 70.3 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 90.15 ms. Allocated memory is still 100.7 MB. Free memory was 70.3 MB in the beginning and 68.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1180.30 ms. Allocated memory is still 100.7 MB. Free memory was 68.2 MB in the beginning and 48.6 MB in the end (delta: 19.6 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9956.09 ms. Allocated memory was 100.7 MB in the beginning and 197.1 MB in the end (delta: 96.5 MB). Free memory was 48.1 MB in the beginning and 84.4 MB in the end (delta: -36.3 MB). Peak memory consumption was 61.7 MB. Max. memory is 16.1 GB. * Witness Printer took 156.62 ms. Allocated memory is still 197.1 MB. Free memory was 84.4 MB in the beginning and 71.7 MB in the end (delta: 12.7 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: 9.7s, OverallIterations: 26, TraceHistogramMax: 4, AutomataDifference: 6.2s, 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, 3.4s 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: 0.8s AutomataMinimizationTime, 25 MinimizatonAttempts, 865 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.1s 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...