./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c -s /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/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 09f813c788ce76f2fed6ff9e53c54c81ca842bfc ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 19:09:35,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:09:35,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:09:36,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:09:36,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:09:36,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:09:36,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:09:36,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:09:36,108 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:09:36,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:09:36,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:09:36,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:09:36,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:09:36,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:09:36,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:09:36,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:09:36,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:09:36,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:09:36,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:09:36,132 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:09:36,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:09:36,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:09:36,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:09:36,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:09:36,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:09:36,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:09:36,159 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:09:36,160 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:09:36,163 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:09:36,165 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:09:36,166 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:09:36,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:09:36,176 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:09:36,178 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:09:36,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:09:36,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:09:36,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:09:36,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:09:36,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:09:36,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:09:36,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:09:36,195 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 19:09:36,244 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:09:36,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:09:36,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:09:36,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:09:36,247 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:09:36,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:09:36,248 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:09:36,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:09:36,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:09:36,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:09:36,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:09:36,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:09:36,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:09:36,250 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:09:36,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:09:36,250 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:09:36,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:09:36,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:09:36,251 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:09:36,252 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:09:36,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:09:36,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:09:36,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:09:36,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:09:36,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:09:36,254 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:09:36,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:09:36,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:09:36,255 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:09:36,255 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_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09f813c788ce76f2fed6ff9e53c54c81ca842bfc [2020-11-29 19:09:36,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:09:36,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:09:36,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:09:36,611 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:09:36,613 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:09:36,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/../../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2020-11-29 19:09:36,713 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/data/b6e477352/41216d6e9c5e4bd5a543842227252e02/FLAG2551f4660 [2020-11-29 19:09:37,326 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:09:37,328 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2020-11-29 19:09:37,338 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/data/b6e477352/41216d6e9c5e4bd5a543842227252e02/FLAG2551f4660 [2020-11-29 19:09:37,638 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/data/b6e477352/41216d6e9c5e4bd5a543842227252e02 [2020-11-29 19:09:37,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:09:37,642 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:09:37,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:09:37,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:09:37,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:09:37,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:09:37" (1/1) ... [2020-11-29 19:09:37,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67d539cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:37, skipping insertion in model container [2020-11-29 19:09:37,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:09:37" (1/1) ... [2020-11-29 19:09:37,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:09:37,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:09:37,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:09:37,978 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:09:38,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:09:38,090 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:09:38,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:38 WrapperNode [2020-11-29 19:09:38,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:09:38,093 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:09:38,093 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:09:38,093 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:09:38,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:38" (1/1) ... [2020-11-29 19:09:38,116 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:38" (1/1) ... [2020-11-29 19:09:38,156 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:09:38,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:09:38,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:09:38,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:09:38,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:38" (1/1) ... [2020-11-29 19:09:38,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:38" (1/1) ... [2020-11-29 19:09:38,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:38" (1/1) ... [2020-11-29 19:09:38,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:38" (1/1) ... [2020-11-29 19:09:38,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:38" (1/1) ... [2020-11-29 19:09:38,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:38" (1/1) ... [2020-11-29 19:09:38,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:38" (1/1) ... [2020-11-29 19:09:38,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:09:38,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:09:38,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:09:38,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:09:38,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:09:38,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:09:38,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:09:38,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:09:38,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:09:39,068 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:09:39,068 INFO L298 CfgBuilder]: Removed 26 assume(true) statements. [2020-11-29 19:09:39,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:09:39 BoogieIcfgContainer [2020-11-29 19:09:39,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:09:39,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:09:39,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:09:39,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:09:39,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:09:37" (1/3) ... [2020-11-29 19:09:39,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4aa68b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:09:39, skipping insertion in model container [2020-11-29 19:09:39,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:38" (2/3) ... [2020-11-29 19:09:39,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4aa68b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:09:39, skipping insertion in model container [2020-11-29 19:09:39,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:09:39" (3/3) ... [2020-11-29 19:09:39,080 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-11-29 19:09:39,090 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:09:39,095 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 19:09:39,110 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 19:09:39,138 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:09:39,139 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:09:39,139 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:09:39,139 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:09:39,139 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:09:39,140 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:09:39,140 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:09:39,140 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:09:39,159 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-11-29 19:09:39,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 19:09:39,168 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:39,169 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] [2020-11-29 19:09:39,169 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:39,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:39,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1243249868, now seen corresponding path program 1 times [2020-11-29 19:09:39,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:39,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155652583] [2020-11-29 19:09:39,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:39,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155652583] [2020-11-29 19:09:39,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:09:39,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:09:39,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535282444] [2020-11-29 19:09:39,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:09:39,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:39,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:09:39,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:09:39,485 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 3 states. [2020-11-29 19:09:39,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:39,553 INFO L93 Difference]: Finished difference Result 151 states and 252 transitions. [2020-11-29 19:09:39,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:09:39,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-11-29 19:09:39,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:39,570 INFO L225 Difference]: With dead ends: 151 [2020-11-29 19:09:39,570 INFO L226 Difference]: Without dead ends: 68 [2020-11-29 19:09:39,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:09:39,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-29 19:09:39,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-11-29 19:09:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-29 19:09:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 101 transitions. [2020-11-29 19:09:39,635 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 101 transitions. Word has length 25 [2020-11-29 19:09:39,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:39,636 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 101 transitions. [2020-11-29 19:09:39,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:09:39,637 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 101 transitions. [2020-11-29 19:09:39,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 19:09:39,639 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:39,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:39,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:09:39,640 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:39,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:39,641 INFO L82 PathProgramCache]: Analyzing trace with hash 464393210, now seen corresponding path program 1 times [2020-11-29 19:09:39,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:39,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35636157] [2020-11-29 19:09:39,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:39,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:39,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35636157] [2020-11-29 19:09:39,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:09:39,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:09:39,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456370034] [2020-11-29 19:09:39,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:09:39,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:39,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:09:39,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:09:39,820 INFO L87 Difference]: Start difference. First operand 68 states and 101 transitions. Second operand 4 states. [2020-11-29 19:09:39,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:39,868 INFO L93 Difference]: Finished difference Result 88 states and 129 transitions. [2020-11-29 19:09:39,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:09:39,873 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-29 19:09:39,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:39,875 INFO L225 Difference]: With dead ends: 88 [2020-11-29 19:09:39,875 INFO L226 Difference]: Without dead ends: 68 [2020-11-29 19:09:39,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:09:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-29 19:09:39,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-11-29 19:09:39,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-29 19:09:39,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 100 transitions. [2020-11-29 19:09:39,901 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 100 transitions. Word has length 27 [2020-11-29 19:09:39,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:39,902 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 100 transitions. [2020-11-29 19:09:39,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:09:39,902 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 100 transitions. [2020-11-29 19:09:39,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 19:09:39,904 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:39,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:39,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 19:09:39,905 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:39,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:39,906 INFO L82 PathProgramCache]: Analyzing trace with hash 722558648, now seen corresponding path program 1 times [2020-11-29 19:09:39,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:39,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716069940] [2020-11-29 19:09:39,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:40,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716069940] [2020-11-29 19:09:40,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:09:40,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:09:40,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592052632] [2020-11-29 19:09:40,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:09:40,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:40,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:09:40,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:09:40,019 INFO L87 Difference]: Start difference. First operand 68 states and 100 transitions. Second operand 3 states. [2020-11-29 19:09:40,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:40,204 INFO L93 Difference]: Finished difference Result 119 states and 172 transitions. [2020-11-29 19:09:40,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:09:40,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-11-29 19:09:40,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:40,212 INFO L225 Difference]: With dead ends: 119 [2020-11-29 19:09:40,212 INFO L226 Difference]: Without dead ends: 69 [2020-11-29 19:09:40,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:09:40,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-29 19:09:40,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2020-11-29 19:09:40,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-29 19:09:40,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 93 transitions. [2020-11-29 19:09:40,225 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 93 transitions. Word has length 27 [2020-11-29 19:09:40,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:40,258 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 93 transitions. [2020-11-29 19:09:40,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:09:40,259 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 93 transitions. [2020-11-29 19:09:40,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 19:09:40,262 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:40,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:40,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 19:09:40,263 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:40,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:40,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1336799219, now seen corresponding path program 1 times [2020-11-29 19:09:40,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:40,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509657858] [2020-11-29 19:09:40,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:40,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509657858] [2020-11-29 19:09:40,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:09:40,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:09:40,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047944253] [2020-11-29 19:09:40,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:09:40,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:40,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:09:40,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:09:40,400 INFO L87 Difference]: Start difference. First operand 65 states and 93 transitions. Second operand 3 states. [2020-11-29 19:09:40,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:40,457 INFO L93 Difference]: Finished difference Result 129 states and 183 transitions. [2020-11-29 19:09:40,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:09:40,458 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-11-29 19:09:40,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:40,460 INFO L225 Difference]: With dead ends: 129 [2020-11-29 19:09:40,460 INFO L226 Difference]: Without dead ends: 75 [2020-11-29 19:09:40,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:09:40,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-29 19:09:40,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-11-29 19:09:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-29 19:09:40,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-11-29 19:09:40,471 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 30 [2020-11-29 19:09:40,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:40,472 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-11-29 19:09:40,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:09:40,472 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-11-29 19:09:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-29 19:09:40,474 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:40,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:40,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 19:09:40,475 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:40,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:40,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1305570860, now seen corresponding path program 1 times [2020-11-29 19:09:40,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:40,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467057619] [2020-11-29 19:09:40,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:40,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:40,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467057619] [2020-11-29 19:09:40,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:09:40,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:09:40,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146915957] [2020-11-29 19:09:40,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:09:40,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:40,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:09:40,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:09:40,601 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 4 states. [2020-11-29 19:09:40,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:40,793 INFO L93 Difference]: Finished difference Result 136 states and 189 transitions. [2020-11-29 19:09:40,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:09:40,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-11-29 19:09:40,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:40,796 INFO L225 Difference]: With dead ends: 136 [2020-11-29 19:09:40,796 INFO L226 Difference]: Without dead ends: 73 [2020-11-29 19:09:40,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:09:40,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-29 19:09:40,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2020-11-29 19:09:40,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-29 19:09:40,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 92 transitions. [2020-11-29 19:09:40,815 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 92 transitions. Word has length 32 [2020-11-29 19:09:40,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:40,816 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 92 transitions. [2020-11-29 19:09:40,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:09:40,816 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 92 transitions. [2020-11-29 19:09:40,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-29 19:09:40,818 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:40,818 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:40,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 19:09:40,819 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:40,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:40,820 INFO L82 PathProgramCache]: Analyzing trace with hash 734686790, now seen corresponding path program 1 times [2020-11-29 19:09:40,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:40,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856543200] [2020-11-29 19:09:40,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:40,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856543200] [2020-11-29 19:09:40,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289913009] [2020-11-29 19:09:40,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:40,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:09:40,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:41,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:09:41,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-29 19:09:41,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636764353] [2020-11-29 19:09:41,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:09:41,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:41,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:09:41,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:09:41,104 INFO L87 Difference]: Start difference. First operand 67 states and 92 transitions. Second operand 5 states. [2020-11-29 19:09:41,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:41,186 INFO L93 Difference]: Finished difference Result 160 states and 218 transitions. [2020-11-29 19:09:41,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:09:41,187 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-11-29 19:09:41,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:41,189 INFO L225 Difference]: With dead ends: 160 [2020-11-29 19:09:41,189 INFO L226 Difference]: Without dead ends: 103 [2020-11-29 19:09:41,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:09:41,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-29 19:09:41,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 72. [2020-11-29 19:09:41,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-29 19:09:41,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 98 transitions. [2020-11-29 19:09:41,199 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 98 transitions. Word has length 33 [2020-11-29 19:09:41,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:41,200 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 98 transitions. [2020-11-29 19:09:41,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:09:41,200 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 98 transitions. [2020-11-29 19:09:41,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-29 19:09:41,202 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:41,202 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:41,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 19:09:41,403 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:41,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:41,404 INFO L82 PathProgramCache]: Analyzing trace with hash -861199835, now seen corresponding path program 1 times [2020-11-29 19:09:41,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:41,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863824482] [2020-11-29 19:09:41,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:41,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863824482] [2020-11-29 19:09:41,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268256082] [2020-11-29 19:09:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:41,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 19:09:41,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:41,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:09:41,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-29 19:09:41,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344710889] [2020-11-29 19:09:41,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:09:41,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:41,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:09:41,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:09:41,888 INFO L87 Difference]: Start difference. First operand 72 states and 98 transitions. Second operand 6 states. [2020-11-29 19:09:42,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:42,049 INFO L93 Difference]: Finished difference Result 126 states and 174 transitions. [2020-11-29 19:09:42,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:09:42,050 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-11-29 19:09:42,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:42,052 INFO L225 Difference]: With dead ends: 126 [2020-11-29 19:09:42,052 INFO L226 Difference]: Without dead ends: 79 [2020-11-29 19:09:42,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:09:42,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-29 19:09:42,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2020-11-29 19:09:42,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-29 19:09:42,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 99 transitions. [2020-11-29 19:09:42,068 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 99 transitions. Word has length 35 [2020-11-29 19:09:42,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:42,069 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 99 transitions. [2020-11-29 19:09:42,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:09:42,069 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 99 transitions. [2020-11-29 19:09:42,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-29 19:09:42,074 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:42,074 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-29 19:09:42,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:42,289 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:42,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:42,290 INFO L82 PathProgramCache]: Analyzing trace with hash -2010695315, now seen corresponding path program 2 times [2020-11-29 19:09:42,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:42,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520034423] [2020-11-29 19:09:42,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:42,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520034423] [2020-11-29 19:09:42,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744836978] [2020-11-29 19:09:42,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:42,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-29 19:09:42,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:09:42,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 19:09:42,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-29 19:09:42,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:09:42,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2020-11-29 19:09:42,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567639125] [2020-11-29 19:09:42,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:09:42,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:42,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:09:42,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:09:42,622 INFO L87 Difference]: Start difference. First operand 73 states and 99 transitions. Second operand 6 states. [2020-11-29 19:09:43,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:43,021 INFO L93 Difference]: Finished difference Result 265 states and 356 transitions. [2020-11-29 19:09:43,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 19:09:43,022 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-11-29 19:09:43,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:43,024 INFO L225 Difference]: With dead ends: 265 [2020-11-29 19:09:43,024 INFO L226 Difference]: Without dead ends: 261 [2020-11-29 19:09:43,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-11-29 19:09:43,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-11-29 19:09:43,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 127. [2020-11-29 19:09:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-11-29 19:09:43,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 174 transitions. [2020-11-29 19:09:43,056 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 174 transitions. Word has length 36 [2020-11-29 19:09:43,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:43,056 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 174 transitions. [2020-11-29 19:09:43,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:09:43,056 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 174 transitions. [2020-11-29 19:09:43,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-29 19:09:43,066 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:43,066 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:43,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:43,293 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:43,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:43,294 INFO L82 PathProgramCache]: Analyzing trace with hash 508659463, now seen corresponding path program 1 times [2020-11-29 19:09:43,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:43,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659799779] [2020-11-29 19:09:43,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:43,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659799779] [2020-11-29 19:09:43,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607093777] [2020-11-29 19:09:43,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:43,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:09:43,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:43,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:09:43,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-29 19:09:43,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083389872] [2020-11-29 19:09:43,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:09:43,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:43,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:09:43,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:09:43,547 INFO L87 Difference]: Start difference. First operand 127 states and 174 transitions. Second operand 6 states. [2020-11-29 19:09:43,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:43,664 INFO L93 Difference]: Finished difference Result 288 states and 395 transitions. [2020-11-29 19:09:43,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:09:43,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-11-29 19:09:43,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:43,667 INFO L225 Difference]: With dead ends: 288 [2020-11-29 19:09:43,667 INFO L226 Difference]: Without dead ends: 188 [2020-11-29 19:09:43,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:09:43,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-11-29 19:09:43,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 134. [2020-11-29 19:09:43,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-11-29 19:09:43,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 182 transitions. [2020-11-29 19:09:43,694 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 182 transitions. Word has length 38 [2020-11-29 19:09:43,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:43,695 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 182 transitions. [2020-11-29 19:09:43,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:09:43,700 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 182 transitions. [2020-11-29 19:09:43,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-29 19:09:43,701 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:43,701 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-11-29 19:09:43,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:43,933 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:43,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:43,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1319305574, now seen corresponding path program 1 times [2020-11-29 19:09:43,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:43,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110068695] [2020-11-29 19:09:43,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:44,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110068695] [2020-11-29 19:09:44,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049429666] [2020-11-29 19:09:44,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:44,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 19:09:44,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:44,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:44,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:09:44,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 19:09:44,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512369162] [2020-11-29 19:09:44,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 19:09:44,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:44,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:09:44,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:09:44,247 INFO L87 Difference]: Start difference. First operand 134 states and 182 transitions. Second operand 7 states. [2020-11-29 19:09:44,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:44,552 INFO L93 Difference]: Finished difference Result 234 states and 325 transitions. [2020-11-29 19:09:44,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:09:44,552 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-11-29 19:09:44,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:44,554 INFO L225 Difference]: With dead ends: 234 [2020-11-29 19:09:44,554 INFO L226 Difference]: Without dead ends: 146 [2020-11-29 19:09:44,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:09:44,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-29 19:09:44,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2020-11-29 19:09:44,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-11-29 19:09:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 184 transitions. [2020-11-29 19:09:44,573 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 184 transitions. Word has length 40 [2020-11-29 19:09:44,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:44,575 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 184 transitions. [2020-11-29 19:09:44,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 19:09:44,576 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 184 transitions. [2020-11-29 19:09:44,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-29 19:09:44,576 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:44,577 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:44,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-29 19:09:44,786 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:44,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:44,786 INFO L82 PathProgramCache]: Analyzing trace with hash -976708544, now seen corresponding path program 2 times [2020-11-29 19:09:44,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:44,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98654853] [2020-11-29 19:09:44,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:44,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98654853] [2020-11-29 19:09:44,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161476552] [2020-11-29 19:09:44,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:44,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-29 19:09:44,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:09:44,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:09:44,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 19:09:45,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:09:45,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-11-29 19:09:45,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455319162] [2020-11-29 19:09:45,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:09:45,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:45,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:09:45,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:09:45,026 INFO L87 Difference]: Start difference. First operand 136 states and 184 transitions. Second operand 5 states. [2020-11-29 19:09:45,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:45,112 INFO L93 Difference]: Finished difference Result 155 states and 203 transitions. [2020-11-29 19:09:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:09:45,113 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-11-29 19:09:45,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:45,115 INFO L225 Difference]: With dead ends: 155 [2020-11-29 19:09:45,115 INFO L226 Difference]: Without dead ends: 150 [2020-11-29 19:09:45,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:09:45,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-11-29 19:09:45,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 145. [2020-11-29 19:09:45,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-29 19:09:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 194 transitions. [2020-11-29 19:09:45,128 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 194 transitions. Word has length 41 [2020-11-29 19:09:45,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:45,129 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 194 transitions. [2020-11-29 19:09:45,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:09:45,129 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 194 transitions. [2020-11-29 19:09:45,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-29 19:09:45,132 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:45,132 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:45,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:45,346 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:45,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:45,347 INFO L82 PathProgramCache]: Analyzing trace with hash -974861502, now seen corresponding path program 1 times [2020-11-29 19:09:45,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:45,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724896381] [2020-11-29 19:09:45,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 19:09:45,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724896381] [2020-11-29 19:09:45,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:09:45,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 19:09:45,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249049301] [2020-11-29 19:09:45,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:09:45,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:45,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:09:45,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:09:45,432 INFO L87 Difference]: Start difference. First operand 145 states and 194 transitions. Second operand 5 states. [2020-11-29 19:09:45,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:45,485 INFO L93 Difference]: Finished difference Result 150 states and 198 transitions. [2020-11-29 19:09:45,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:09:45,486 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-11-29 19:09:45,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:45,487 INFO L225 Difference]: With dead ends: 150 [2020-11-29 19:09:45,487 INFO L226 Difference]: Without dead ends: 140 [2020-11-29 19:09:45,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:09:45,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-11-29 19:09:45,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-11-29 19:09:45,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-11-29 19:09:45,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2020-11-29 19:09:45,499 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 41 [2020-11-29 19:09:45,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:45,500 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2020-11-29 19:09:45,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:09:45,502 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2020-11-29 19:09:45,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-29 19:09:45,503 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:45,503 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:45,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-29 19:09:45,504 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:45,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:45,506 INFO L82 PathProgramCache]: Analyzing trace with hash -543462300, now seen corresponding path program 1 times [2020-11-29 19:09:45,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:45,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186348979] [2020-11-29 19:09:45,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:45,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186348979] [2020-11-29 19:09:45,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482216112] [2020-11-29 19:09:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:45,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:09:45,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:45,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:09:45,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 19:09:45,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393323022] [2020-11-29 19:09:45,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 19:09:45,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:45,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:09:45,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:09:45,756 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand 7 states. [2020-11-29 19:09:45,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:45,873 INFO L93 Difference]: Finished difference Result 315 states and 414 transitions. [2020-11-29 19:09:45,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:09:45,874 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-11-29 19:09:45,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:45,877 INFO L225 Difference]: With dead ends: 315 [2020-11-29 19:09:45,877 INFO L226 Difference]: Without dead ends: 208 [2020-11-29 19:09:45,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:09:45,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-11-29 19:09:45,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 147. [2020-11-29 19:09:45,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-11-29 19:09:45,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 193 transitions. [2020-11-29 19:09:45,891 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 193 transitions. Word has length 42 [2020-11-29 19:09:45,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:45,891 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 193 transitions. [2020-11-29 19:09:45,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 19:09:45,892 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 193 transitions. [2020-11-29 19:09:45,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-29 19:09:45,892 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:45,893 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:46,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:46,121 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:46,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:46,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1931714523, now seen corresponding path program 1 times [2020-11-29 19:09:46,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:46,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693773514] [2020-11-29 19:09:46,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:46,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693773514] [2020-11-29 19:09:46,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809911603] [2020-11-29 19:09:46,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:46,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 19:09:46,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:46,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:46,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:09:46,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-29 19:09:46,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646581748] [2020-11-29 19:09:46,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:09:46,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:46,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:09:46,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:09:46,507 INFO L87 Difference]: Start difference. First operand 147 states and 193 transitions. Second operand 8 states. [2020-11-29 19:09:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:46,876 INFO L93 Difference]: Finished difference Result 251 states and 337 transitions. [2020-11-29 19:09:46,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 19:09:46,877 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-11-29 19:09:46,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:46,879 INFO L225 Difference]: With dead ends: 251 [2020-11-29 19:09:46,879 INFO L226 Difference]: Without dead ends: 159 [2020-11-29 19:09:46,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:09:46,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-11-29 19:09:46,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 149. [2020-11-29 19:09:46,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-11-29 19:09:46,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 195 transitions. [2020-11-29 19:09:46,890 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 195 transitions. Word has length 44 [2020-11-29 19:09:46,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:46,890 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 195 transitions. [2020-11-29 19:09:46,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:09:46,891 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 195 transitions. [2020-11-29 19:09:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-29 19:09:46,892 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:46,892 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:47,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 19:09:47,107 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:47,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:47,108 INFO L82 PathProgramCache]: Analyzing trace with hash 514014493, now seen corresponding path program 2 times [2020-11-29 19:09:47,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:47,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290340332] [2020-11-29 19:09:47,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:47,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290340332] [2020-11-29 19:09:47,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185798522] [2020-11-29 19:09:47,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:47,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-29 19:09:47,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:09:47,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 19:09:47,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-29 19:09:47,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:09:47,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2020-11-29 19:09:47,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875531215] [2020-11-29 19:09:47,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:09:47,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:47,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:09:47,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:09:47,340 INFO L87 Difference]: Start difference. First operand 149 states and 195 transitions. Second operand 6 states. [2020-11-29 19:09:47,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:47,527 INFO L93 Difference]: Finished difference Result 211 states and 269 transitions. [2020-11-29 19:09:47,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:09:47,528 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-11-29 19:09:47,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:47,530 INFO L225 Difference]: With dead ends: 211 [2020-11-29 19:09:47,530 INFO L226 Difference]: Without dead ends: 171 [2020-11-29 19:09:47,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-11-29 19:09:47,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-11-29 19:09:47,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 157. [2020-11-29 19:09:47,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-11-29 19:09:47,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 201 transitions. [2020-11-29 19:09:47,556 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 201 transitions. Word has length 45 [2020-11-29 19:09:47,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:47,556 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 201 transitions. [2020-11-29 19:09:47,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:09:47,556 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 201 transitions. [2020-11-29 19:09:47,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-29 19:09:47,557 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:47,557 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:47,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-29 19:09:47,758 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:47,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:47,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1892120530, now seen corresponding path program 1 times [2020-11-29 19:09:47,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:47,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962743284] [2020-11-29 19:09:47,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:47,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962743284] [2020-11-29 19:09:47,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504602859] [2020-11-29 19:09:47,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:47,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:09:47,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:47,978 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:47,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:09:47,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-29 19:09:47,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892418807] [2020-11-29 19:09:47,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:09:47,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:47,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:09:47,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:09:47,981 INFO L87 Difference]: Start difference. First operand 157 states and 201 transitions. Second operand 8 states. [2020-11-29 19:09:48,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:48,119 INFO L93 Difference]: Finished difference Result 346 states and 442 transitions. [2020-11-29 19:09:48,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 19:09:48,121 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-11-29 19:09:48,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:48,123 INFO L225 Difference]: With dead ends: 346 [2020-11-29 19:09:48,123 INFO L226 Difference]: Without dead ends: 228 [2020-11-29 19:09:48,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:09:48,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-11-29 19:09:48,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 164. [2020-11-29 19:09:48,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-11-29 19:09:48,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 209 transitions. [2020-11-29 19:09:48,138 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 209 transitions. Word has length 49 [2020-11-29 19:09:48,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:48,138 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 209 transitions. [2020-11-29 19:09:48,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:09:48,138 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 209 transitions. [2020-11-29 19:09:48,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-29 19:09:48,139 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:48,139 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:48,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-29 19:09:48,342 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:48,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:48,342 INFO L82 PathProgramCache]: Analyzing trace with hash -260802349, now seen corresponding path program 1 times [2020-11-29 19:09:48,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:48,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875142932] [2020-11-29 19:09:48,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:48,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875142932] [2020-11-29 19:09:48,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263410627] [2020-11-29 19:09:48,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:48,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 19:09:48,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:48,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:09:48,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-29 19:09:48,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975882746] [2020-11-29 19:09:48,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 19:09:48,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:48,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 19:09:48,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:09:48,722 INFO L87 Difference]: Start difference. First operand 164 states and 209 transitions. Second operand 9 states. [2020-11-29 19:09:49,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:49,150 INFO L93 Difference]: Finished difference Result 276 states and 359 transitions. [2020-11-29 19:09:49,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 19:09:49,151 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-11-29 19:09:49,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:49,153 INFO L225 Difference]: With dead ends: 276 [2020-11-29 19:09:49,153 INFO L226 Difference]: Without dead ends: 176 [2020-11-29 19:09:49,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:09:49,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-11-29 19:09:49,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 166. [2020-11-29 19:09:49,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-11-29 19:09:49,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 211 transitions. [2020-11-29 19:09:49,166 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 211 transitions. Word has length 51 [2020-11-29 19:09:49,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:49,166 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 211 transitions. [2020-11-29 19:09:49,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 19:09:49,166 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 211 transitions. [2020-11-29 19:09:49,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-29 19:09:49,167 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:49,168 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:49,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 19:09:49,397 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:49,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:49,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1844505351, now seen corresponding path program 2 times [2020-11-29 19:09:49,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:49,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221392787] [2020-11-29 19:09:49,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:49,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221392787] [2020-11-29 19:09:49,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642294829] [2020-11-29 19:09:49,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:49,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-29 19:09:49,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:09:49,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 19:09:49,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-29 19:09:49,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:09:49,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2020-11-29 19:09:49,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307340821] [2020-11-29 19:09:49,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 19:09:49,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:49,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:09:49,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-29 19:09:49,706 INFO L87 Difference]: Start difference. First operand 166 states and 211 transitions. Second operand 7 states. [2020-11-29 19:09:49,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:49,998 INFO L93 Difference]: Finished difference Result 222 states and 273 transitions. [2020-11-29 19:09:49,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 19:09:50,000 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-11-29 19:09:50,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:50,001 INFO L225 Difference]: With dead ends: 222 [2020-11-29 19:09:50,002 INFO L226 Difference]: Without dead ends: 186 [2020-11-29 19:09:50,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-11-29 19:09:50,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-11-29 19:09:50,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 166. [2020-11-29 19:09:50,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-11-29 19:09:50,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 207 transitions. [2020-11-29 19:09:50,014 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 207 transitions. Word has length 52 [2020-11-29 19:09:50,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:50,014 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 207 transitions. [2020-11-29 19:09:50,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 19:09:50,015 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 207 transitions. [2020-11-29 19:09:50,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-29 19:09:50,016 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:50,016 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:50,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 19:09:50,241 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:50,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:50,242 INFO L82 PathProgramCache]: Analyzing trace with hash 365328708, now seen corresponding path program 1 times [2020-11-29 19:09:50,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:50,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801112529] [2020-11-29 19:09:50,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:50,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801112529] [2020-11-29 19:09:50,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627484744] [2020-11-29 19:09:50,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:50,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 19:09:50,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:50,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:09:50,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-29 19:09:50,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457970039] [2020-11-29 19:09:50,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 19:09:50,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:50,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 19:09:50,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:09:50,498 INFO L87 Difference]: Start difference. First operand 166 states and 207 transitions. Second operand 9 states. [2020-11-29 19:09:50,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:50,630 INFO L93 Difference]: Finished difference Result 361 states and 450 transitions. [2020-11-29 19:09:50,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 19:09:50,631 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-11-29 19:09:50,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:50,633 INFO L225 Difference]: With dead ends: 361 [2020-11-29 19:09:50,633 INFO L226 Difference]: Without dead ends: 240 [2020-11-29 19:09:50,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:09:50,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-11-29 19:09:50,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 173. [2020-11-29 19:09:50,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-11-29 19:09:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2020-11-29 19:09:50,646 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 54 [2020-11-29 19:09:50,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:50,646 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2020-11-29 19:09:50,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 19:09:50,646 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2020-11-29 19:09:50,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-29 19:09:50,647 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:50,647 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:50,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:50,861 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:50,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:50,862 INFO L82 PathProgramCache]: Analyzing trace with hash 520464227, now seen corresponding path program 1 times [2020-11-29 19:09:50,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:50,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12124928] [2020-11-29 19:09:50,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-11-29 19:09:50,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12124928] [2020-11-29 19:09:50,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:09:50,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:09:50,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889290471] [2020-11-29 19:09:50,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:09:50,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:50,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:09:50,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:09:50,925 INFO L87 Difference]: Start difference. First operand 173 states and 215 transitions. Second operand 3 states. [2020-11-29 19:09:51,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:51,004 INFO L93 Difference]: Finished difference Result 244 states and 300 transitions. [2020-11-29 19:09:51,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:09:51,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-11-29 19:09:51,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:51,005 INFO L225 Difference]: With dead ends: 244 [2020-11-29 19:09:51,006 INFO L226 Difference]: Without dead ends: 74 [2020-11-29 19:09:51,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:09:51,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-29 19:09:51,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-11-29 19:09:51,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-29 19:09:51,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2020-11-29 19:09:51,013 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 56 [2020-11-29 19:09:51,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:51,014 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2020-11-29 19:09:51,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:09:51,014 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2020-11-29 19:09:51,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-29 19:09:51,019 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:51,020 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:51,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-29 19:09:51,020 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:51,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:51,021 INFO L82 PathProgramCache]: Analyzing trace with hash -408520283, now seen corresponding path program 1 times [2020-11-29 19:09:51,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:51,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200179922] [2020-11-29 19:09:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:51,215 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:51,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200179922] [2020-11-29 19:09:51,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652323679] [2020-11-29 19:09:51,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:51,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 19:09:51,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:51,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:09:51,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-29 19:09:51,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467808239] [2020-11-29 19:09:51,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 19:09:51,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:51,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 19:09:51,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:09:51,467 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 10 states. [2020-11-29 19:09:51,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:51,841 INFO L93 Difference]: Finished difference Result 126 states and 154 transitions. [2020-11-29 19:09:51,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 19:09:51,842 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-11-29 19:09:51,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:51,843 INFO L225 Difference]: With dead ends: 126 [2020-11-29 19:09:51,843 INFO L226 Difference]: Without dead ends: 79 [2020-11-29 19:09:51,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:09:51,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-29 19:09:51,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2020-11-29 19:09:51,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-29 19:09:51,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2020-11-29 19:09:51,853 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 58 [2020-11-29 19:09:51,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:51,853 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2020-11-29 19:09:51,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 19:09:51,854 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2020-11-29 19:09:51,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-29 19:09:51,854 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:51,855 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:52,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:52,065 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:52,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:52,066 INFO L82 PathProgramCache]: Analyzing trace with hash -807057443, now seen corresponding path program 1 times [2020-11-29 19:09:52,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:52,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391837033] [2020-11-29 19:09:52,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:52,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391837033] [2020-11-29 19:09:52,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148299313] [2020-11-29 19:09:52,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:52,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 19:09:52,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:52,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:09:52,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-29 19:09:52,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840170952] [2020-11-29 19:09:52,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 19:09:52,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:52,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 19:09:52,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:09:52,287 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand 10 states. [2020-11-29 19:09:52,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:52,378 INFO L93 Difference]: Finished difference Result 149 states and 180 transitions. [2020-11-29 19:09:52,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 19:09:52,379 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-11-29 19:09:52,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:52,380 INFO L225 Difference]: With dead ends: 149 [2020-11-29 19:09:52,381 INFO L226 Difference]: Without dead ends: 103 [2020-11-29 19:09:52,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:09:52,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-29 19:09:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 77. [2020-11-29 19:09:52,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-29 19:09:52,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2020-11-29 19:09:52,389 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 59 [2020-11-29 19:09:52,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:52,389 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2020-11-29 19:09:52,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 19:09:52,390 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2020-11-29 19:09:52,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-29 19:09:52,390 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:52,391 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:52,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-29 19:09:52,617 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:52,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:52,618 INFO L82 PathProgramCache]: Analyzing trace with hash -2016429986, now seen corresponding path program 2 times [2020-11-29 19:09:52,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:52,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156855029] [2020-11-29 19:09:52,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:52,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156855029] [2020-11-29 19:09:52,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463787290] [2020-11-29 19:09:52,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:53,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-29 19:09:53,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:09:53,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 19:09:53,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-11-29 19:09:53,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:09:53,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2020-11-29 19:09:53,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284591581] [2020-11-29 19:09:53,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:09:53,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:53,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:09:53,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-11-29 19:09:53,315 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand 8 states. [2020-11-29 19:09:53,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:53,613 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2020-11-29 19:09:53,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 19:09:53,614 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-11-29 19:09:53,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:09:53,614 INFO L225 Difference]: With dead ends: 80 [2020-11-29 19:09:53,614 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 19:09:53,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-11-29 19:09:53,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 19:09:53,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 19:09:53,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 19:09:53,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 19:09:53,615 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 61 [2020-11-29 19:09:53,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:09:53,615 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:09:53,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:09:53,615 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 19:09:53,615 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 19:09:53,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:53,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 19:09:54,410 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-11-29 19:09:54,410 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 19:09:54,410 INFO L274 CegarLoopResult]: For program point L235(lines 235 244) no Hoare annotation was computed. [2020-11-29 19:09:54,410 INFO L274 CegarLoopResult]: For program point L235-2(lines 235 244) no Hoare annotation was computed. [2020-11-29 19:09:54,410 INFO L274 CegarLoopResult]: For program point L252(lines 252 256) no Hoare annotation was computed. [2020-11-29 19:09:54,410 INFO L274 CegarLoopResult]: For program point L186(lines 186 203) no Hoare annotation was computed. [2020-11-29 19:09:54,410 INFO L274 CegarLoopResult]: For program point L252-2(lines 252 256) no Hoare annotation was computed. [2020-11-29 19:09:54,410 INFO L274 CegarLoopResult]: For program point L186-2(lines 186 203) no Hoare annotation was computed. [2020-11-29 19:09:54,410 INFO L274 CegarLoopResult]: For program point L21(lines 21 26) no Hoare annotation was computed. [2020-11-29 19:09:54,411 INFO L274 CegarLoopResult]: For program point L21-1(lines 21 26) no Hoare annotation was computed. [2020-11-29 19:09:54,411 INFO L274 CegarLoopResult]: For program point L21-2(lines 21 26) no Hoare annotation was computed. [2020-11-29 19:09:54,411 INFO L274 CegarLoopResult]: For program point L21-3(lines 21 26) no Hoare annotation was computed. [2020-11-29 19:09:54,411 INFO L270 CegarLoopResult]: At program point L71(lines 20 73) the Hoare annotation is: (and (= ULTIMATE.start_base2flt_~e 0) (= ULTIMATE.start_base2flt_~__retres4~0 0) (= ULTIMATE.start_base2flt_~m 0)) [2020-11-29 19:09:54,411 INFO L270 CegarLoopResult]: At program point L71-1(lines 20 73) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2020-11-29 19:09:54,411 INFO L270 CegarLoopResult]: At program point L71-2(lines 20 73) the Hoare annotation is: (or (= ULTIMATE.start_main_~zero~0 0) (= ULTIMATE.start_base2flt_~__retres4~0 0)) [2020-11-29 19:09:54,411 INFO L270 CegarLoopResult]: At program point L71-3(lines 20 73) the Hoare annotation is: (or (and (<= (mod ULTIMATE.start_main_~zero~0 4294967296) 0) (= ULTIMATE.start_base2flt_~__retres4~0 0)) (= ULTIMATE.start_main_~a~0 0) (= ULTIMATE.start_main_~zero~0 0)) [2020-11-29 19:09:54,411 INFO L274 CegarLoopResult]: For program point L187(lines 187 192) no Hoare annotation was computed. [2020-11-29 19:09:54,412 INFO L274 CegarLoopResult]: For program point L171(lines 171 176) no Hoare annotation was computed. [2020-11-29 19:09:54,412 INFO L270 CegarLoopResult]: At program point L72(lines 16 74) the Hoare annotation is: (and (= ULTIMATE.start_base2flt_~e 0) (= |ULTIMATE.start_base2flt_#res| 0) (= ULTIMATE.start_base2flt_~__retres4~0 0) (= ULTIMATE.start_base2flt_~m 0)) [2020-11-29 19:09:54,412 INFO L274 CegarLoopResult]: For program point L39(lines 39 43) no Hoare annotation was computed. [2020-11-29 19:09:54,412 INFO L270 CegarLoopResult]: At program point L72-1(lines 16 74) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2020-11-29 19:09:54,412 INFO L270 CegarLoopResult]: At program point L39-1(lines 29 44) the Hoare annotation is: false [2020-11-29 19:09:54,412 INFO L270 CegarLoopResult]: At program point L72-2(lines 16 74) the Hoare annotation is: (or (and (= |ULTIMATE.start_base2flt_#res| 0) (= ULTIMATE.start_base2flt_~__retres4~0 0)) (= ULTIMATE.start_main_~zero~0 0)) [2020-11-29 19:09:54,412 INFO L274 CegarLoopResult]: For program point L39-2(lines 39 43) no Hoare annotation was computed. [2020-11-29 19:09:54,412 INFO L270 CegarLoopResult]: At program point L72-3(lines 16 74) the Hoare annotation is: (or (= ULTIMATE.start_main_~a~0 0) (= ULTIMATE.start_main_~zero~0 0) (and (= |ULTIMATE.start_base2flt_#res| 0) (<= (mod ULTIMATE.start_main_~zero~0 4294967296) 0) (= ULTIMATE.start_base2flt_~__retres4~0 0))) [2020-11-29 19:09:54,412 INFO L270 CegarLoopResult]: At program point L39-3(lines 29 44) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2020-11-29 19:09:54,412 INFO L274 CegarLoopResult]: For program point L39-4(lines 39 43) no Hoare annotation was computed. [2020-11-29 19:09:54,413 INFO L270 CegarLoopResult]: At program point L39-5(lines 29 44) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2020-11-29 19:09:54,413 INFO L274 CegarLoopResult]: For program point L39-6(lines 39 43) no Hoare annotation was computed. [2020-11-29 19:09:54,413 INFO L270 CegarLoopResult]: At program point L39-7(lines 29 44) the Hoare annotation is: (or (= ULTIMATE.start_main_~a~0 0) (= ULTIMATE.start_main_~zero~0 0)) [2020-11-29 19:09:54,413 INFO L274 CegarLoopResult]: For program point L238(lines 238 242) no Hoare annotation was computed. [2020-11-29 19:09:54,413 INFO L274 CegarLoopResult]: For program point L238-2(lines 238 242) no Hoare annotation was computed. [2020-11-29 19:09:54,413 INFO L274 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-11-29 19:09:54,413 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 19:09:54,413 INFO L274 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-11-29 19:09:54,413 INFO L270 CegarLoopResult]: At program point L208(lines 149 210) the Hoare annotation is: (or (and (= ULTIMATE.start_main_~sa~0 1) (= ULTIMATE.start_main_~tmp~2 1)) (and (= ULTIMATE.start_mulflt_~__retres10~1 0) (<= (mod ULTIMATE.start_main_~zero~0 4294967296) 0)) (<= (+ ULTIMATE.start_main_~sa~0 1) 0)) [2020-11-29 19:09:54,413 INFO L274 CegarLoopResult]: For program point L27(lines 27 67) no Hoare annotation was computed. [2020-11-29 19:09:54,414 INFO L274 CegarLoopResult]: For program point L27-1(lines 27 67) no Hoare annotation was computed. [2020-11-29 19:09:54,414 INFO L274 CegarLoopResult]: For program point L27-2(lines 27 67) no Hoare annotation was computed. [2020-11-29 19:09:54,414 INFO L274 CegarLoopResult]: For program point L27-3(lines 27 67) no Hoare annotation was computed. [2020-11-29 19:09:54,414 INFO L270 CegarLoopResult]: At program point L209(lines 139 211) the Hoare annotation is: (or (and (= ULTIMATE.start_mulflt_~__retres10~1 0) (<= (mod ULTIMATE.start_main_~zero~0 4294967296) 0) (= |ULTIMATE.start_mulflt_#res| 0)) (and (= ULTIMATE.start_main_~sa~0 1) (= ULTIMATE.start_main_~tmp~2 1)) (<= (+ ULTIMATE.start_main_~sa~0 1) 0)) [2020-11-29 19:09:54,414 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 19:09:54,414 INFO L274 CegarLoopResult]: For program point L177(lines 177 182) no Hoare annotation was computed. [2020-11-29 19:09:54,414 INFO L274 CegarLoopResult]: For program point L195(lines 195 200) no Hoare annotation was computed. [2020-11-29 19:09:54,414 INFO L274 CegarLoopResult]: For program point L30(lines 29 44) no Hoare annotation was computed. [2020-11-29 19:09:54,414 INFO L274 CegarLoopResult]: For program point L30-1(lines 29 44) no Hoare annotation was computed. [2020-11-29 19:09:54,414 INFO L274 CegarLoopResult]: For program point L30-2(lines 29 44) no Hoare annotation was computed. [2020-11-29 19:09:54,414 INFO L274 CegarLoopResult]: For program point L30-3(lines 29 44) no Hoare annotation was computed. [2020-11-29 19:09:54,415 INFO L270 CegarLoopResult]: At program point L65(lines 27 67) the Hoare annotation is: false [2020-11-29 19:09:54,415 INFO L270 CegarLoopResult]: At program point L65-1(lines 27 67) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2020-11-29 19:09:54,415 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 19:09:54,415 INFO L270 CegarLoopResult]: At program point L65-2(lines 27 67) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2020-11-29 19:09:54,415 INFO L270 CegarLoopResult]: At program point L65-3(lines 27 67) the Hoare annotation is: (or (= ULTIMATE.start_main_~a~0 0) (= ULTIMATE.start_main_~zero~0 0)) [2020-11-29 19:09:54,415 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-29 19:09:54,415 INFO L270 CegarLoopResult]: At program point L49-2(lines 49 64) the Hoare annotation is: false [2020-11-29 19:09:54,415 INFO L270 CegarLoopResult]: At program point L49-5(lines 49 64) the Hoare annotation is: false [2020-11-29 19:09:54,415 INFO L270 CegarLoopResult]: At program point L49-8(lines 49 64) the Hoare annotation is: (= ULTIMATE.start_main_~zero~0 0) [2020-11-29 19:09:54,415 INFO L270 CegarLoopResult]: At program point L49-11(lines 49 64) the Hoare annotation is: (or (= ULTIMATE.start_main_~a~0 0) (= ULTIMATE.start_main_~zero~0 0)) [2020-11-29 19:09:54,416 INFO L274 CegarLoopResult]: For program point L248(lines 248 264) no Hoare annotation was computed. [2020-11-29 19:09:54,416 INFO L277 CegarLoopResult]: At program point L248-1(lines 248 264) the Hoare annotation is: true [2020-11-29 19:09:54,416 INFO L274 CegarLoopResult]: For program point L50(lines 49 64) no Hoare annotation was computed. [2020-11-29 19:09:54,416 INFO L274 CegarLoopResult]: For program point L50-1(lines 49 64) no Hoare annotation was computed. [2020-11-29 19:09:54,416 INFO L274 CegarLoopResult]: For program point L50-2(lines 49 64) no Hoare annotation was computed. [2020-11-29 19:09:54,416 INFO L274 CegarLoopResult]: For program point L50-3(lines 49 64) no Hoare annotation was computed. [2020-11-29 19:09:54,416 INFO L274 CegarLoopResult]: For program point L249(lines 249 258) no Hoare annotation was computed. [2020-11-29 19:09:54,416 INFO L274 CegarLoopResult]: For program point L249-2(lines 249 258) no Hoare annotation was computed. [2020-11-29 19:09:54,416 INFO L274 CegarLoopResult]: For program point L150(lines 150 156) no Hoare annotation was computed. [2020-11-29 19:09:54,416 INFO L274 CegarLoopResult]: For program point L150-2(lines 149 210) no Hoare annotation was computed. [2020-11-29 19:09:54,416 INFO L274 CegarLoopResult]: For program point L51(lines 49 64) no Hoare annotation was computed. [2020-11-29 19:09:54,417 INFO L274 CegarLoopResult]: For program point L51-1(lines 49 64) no Hoare annotation was computed. [2020-11-29 19:09:54,417 INFO L274 CegarLoopResult]: For program point L51-2(lines 49 64) no Hoare annotation was computed. [2020-11-29 19:09:54,417 INFO L274 CegarLoopResult]: For program point L51-3(lines 49 64) no Hoare annotation was computed. [2020-11-29 19:09:54,420 INFO L277 CegarLoopResult]: At program point L266(lines 212 268) the Hoare annotation is: true [2020-11-29 19:09:54,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:09:54 BoogieIcfgContainer [2020-11-29 19:09:54,471 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:09:54,471 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:09:54,472 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:09:54,472 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:09:54,473 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:09:39" (3/4) ... [2020-11-29 19:09:54,478 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 19:09:54,507 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2020-11-29 19:09:54,508 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-29 19:09:54,509 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 19:09:54,509 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 19:09:54,536 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((e == 0 && \result == 0) && __retres4 == 0) && m == 0 [2020-11-29 19:09:54,538 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (\result == 0 && __retres4 == 0) || zero == 0 [2020-11-29 19:09:54,539 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (a == 0 || zero == 0) || ((\result == 0 && zero % 4294967296 <= 0) && __retres4 == 0) [2020-11-29 19:09:54,540 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((__retres10 == 0 && zero % 4294967296 <= 0) && \result == 0) || (sa == 1 && tmp == 1)) || sa + 1 <= 0 [2020-11-29 19:09:54,580 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0acc7c21-98e5-4381-a6e2-7ef1609d1a0f/bin/uautomizer/witness.graphml [2020-11-29 19:09:54,581 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:09:54,582 INFO L168 Benchmark]: Toolchain (without parser) took 16939.28 ms. Allocated memory was 102.8 MB in the beginning and 180.4 MB in the end (delta: 77.6 MB). Free memory was 75.8 MB in the beginning and 110.0 MB in the end (delta: -34.2 MB). Peak memory consumption was 44.3 MB. Max. memory is 16.1 GB. [2020-11-29 19:09:54,583 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 102.8 MB. Free memory is still 60.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:09:54,583 INFO L168 Benchmark]: CACSL2BoogieTranslator took 447.66 ms. Allocated memory is still 102.8 MB. Free memory was 75.7 MB in the beginning and 76.3 MB in the end (delta: -654.8 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 19:09:54,584 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.28 ms. Allocated memory is still 102.8 MB. Free memory was 76.3 MB in the beginning and 74.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:09:54,584 INFO L168 Benchmark]: Boogie Preprocessor took 68.55 ms. Allocated memory is still 102.8 MB. Free memory was 74.1 MB in the beginning and 72.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:09:54,585 INFO L168 Benchmark]: RCFGBuilder took 833.72 ms. Allocated memory was 102.8 MB in the beginning and 148.9 MB in the end (delta: 46.1 MB). Free memory was 72.3 MB in the beginning and 121.7 MB in the end (delta: -49.4 MB). Peak memory consumption was 29.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:09:54,585 INFO L168 Benchmark]: TraceAbstraction took 15398.33 ms. Allocated memory was 148.9 MB in the beginning and 180.4 MB in the end (delta: 31.5 MB). Free memory was 121.0 MB in the beginning and 116.2 MB in the end (delta: 4.8 MB). Peak memory consumption was 104.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:09:54,586 INFO L168 Benchmark]: Witness Printer took 109.34 ms. Allocated memory is still 180.4 MB. Free memory was 116.2 MB in the beginning and 110.0 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-29 19:09:54,588 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 102.8 MB. Free memory is still 60.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 447.66 ms. Allocated memory is still 102.8 MB. Free memory was 75.7 MB in the beginning and 76.3 MB in the end (delta: -654.8 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 63.28 ms. Allocated memory is still 102.8 MB. Free memory was 76.3 MB in the beginning and 74.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 68.55 ms. Allocated memory is still 102.8 MB. Free memory was 74.1 MB in the beginning and 72.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 833.72 ms. Allocated memory was 102.8 MB in the beginning and 148.9 MB in the end (delta: 46.1 MB). Free memory was 72.3 MB in the beginning and 121.7 MB in the end (delta: -49.4 MB). Peak memory consumption was 29.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15398.33 ms. Allocated memory was 148.9 MB in the beginning and 180.4 MB in the end (delta: 31.5 MB). Free memory was 121.0 MB in the beginning and 116.2 MB in the end (delta: 4.8 MB). Peak memory consumption was 104.4 MB. Max. memory is 16.1 GB. * Witness Printer took 109.34 ms. Allocated memory is still 180.4 MB. Free memory was 116.2 MB in the beginning and 110.0 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: zero == 0 || __retres4 == 0 - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: (a == 0 || zero == 0) || ((\result == 0 && zero % 4294967296 <= 0) && __retres4 == 0) - InvariantResult [Line: 149]: Loop Invariant Derived loop invariant: ((sa == 1 && tmp == 1) || (__retres10 == 0 && zero % 4294967296 <= 0)) || sa + 1 <= 0 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: zero == 0 - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: (\result == 0 && __retres4 == 0) || zero == 0 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: a == 0 || zero == 0 - InvariantResult [Line: 139]: Loop Invariant Derived loop invariant: (((__retres10 == 0 && zero % 4294967296 <= 0) && \result == 0) || (sa == 1 && tmp == 1)) || sa + 1 <= 0 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (e == 0 && __retres4 == 0) && m == 0 - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: zero == 0 - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: ((e == 0 && \result == 0) && __retres4 == 0) && m == 0 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: a == 0 || zero == 0 - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: zero == 0 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: zero == 0 - InvariantResult [Line: 212]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: zero == 0 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: a == 0 || zero == 0 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 248]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: zero == 0 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: ((zero % 4294967296 <= 0 && __retres4 == 0) || a == 0) || zero == 0 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: zero == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 73 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.6s, OverallIterations: 23, TraceHistogramMax: 7, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2070 SDtfs, 1284 SDslu, 5197 SDs, 0 SdLazy, 1986 SolverSat, 177 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 891 GetRequests, 724 SyntacticMatches, 17 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=173occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 23 MinimizatonAttempts, 529 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 24 LocationsWithAnnotation, 24 PreInvPairs, 68 NumberOfFragments, 171 HoareAnnotationTreeSize, 24 FomulaSimplifications, 20959 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 24 FomulaSimplificationsInter, 163 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 1714 NumberOfCodeBlocks, 1654 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 1675 ConstructedInterpolants, 0 QuantifiedInterpolants, 169770 SizeOfPredicates, 46 NumberOfNonLiveVariables, 2685 ConjunctsInSsa, 156 ConjunctsInUnsatCore, 39 InterpolantComputations, 12 PerfectInterpolantSequences, 211/866 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 correct! Received shutdown request...