./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_7.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_f688d52f-e033-476d-82f3-f72c3d85d684/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f688d52f-e033-476d-82f3-f72c3d85d684/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f688d52f-e033-476d-82f3-f72c3d85d684/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f688d52f-e033-476d-82f3-f72c3d85d684/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/locks/test_locks_7.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f688d52f-e033-476d-82f3-f72c3d85d684/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f688d52f-e033-476d-82f3-f72c3d85d684/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 d2a1f90505878c0035f7701a954d17ca4375eb05 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 19:43:32,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:43:32,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:43:32,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:43:32,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:43:32,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:43:32,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:43:32,325 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:43:32,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:43:32,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:43:32,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:43:32,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:43:32,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:43:32,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:43:32,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:43:32,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:43:32,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:43:32,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:43:32,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:43:32,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:43:32,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:43:32,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:43:32,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:43:32,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:43:32,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:43:32,362 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:43:32,363 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:43:32,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:43:32,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:43:32,367 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:43:32,368 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:43:32,369 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:43:32,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:43:32,372 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:43:32,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:43:32,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:43:32,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:43:32,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:43:32,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:43:32,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:43:32,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:43:32,381 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f688d52f-e033-476d-82f3-f72c3d85d684/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 19:43:32,405 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:43:32,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:43:32,407 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:43:32,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:43:32,408 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:43:32,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:43:32,409 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:43:32,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:43:32,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:43:32,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:43:32,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:43:32,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:43:32,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:43:32,412 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:43:32,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:43:32,413 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:43:32,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:43:32,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:43:32,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:43:32,415 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:43:32,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:43:32,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:43:32,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:43:32,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:43:32,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:43:32,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:43:32,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:43:32,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:43:32,418 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:43:32,418 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_f688d52f-e033-476d-82f3-f72c3d85d684/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f688d52f-e033-476d-82f3-f72c3d85d684/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a1f90505878c0035f7701a954d17ca4375eb05 [2020-11-29 19:43:32,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:43:32,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:43:32,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:43:32,765 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:43:32,768 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:43:32,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f688d52f-e033-476d-82f3-f72c3d85d684/bin/uautomizer/../../sv-benchmarks/c/locks/test_locks_7.c [2020-11-29 19:43:32,857 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f688d52f-e033-476d-82f3-f72c3d85d684/bin/uautomizer/data/8ef7dd4cc/f47a1b6e1c35444e8c8f57d166ebed8b/FLAG2e0a3a7f2 [2020-11-29 19:43:33,437 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:43:33,438 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f688d52f-e033-476d-82f3-f72c3d85d684/sv-benchmarks/c/locks/test_locks_7.c [2020-11-29 19:43:33,446 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f688d52f-e033-476d-82f3-f72c3d85d684/bin/uautomizer/data/8ef7dd4cc/f47a1b6e1c35444e8c8f57d166ebed8b/FLAG2e0a3a7f2 [2020-11-29 19:43:33,811 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f688d52f-e033-476d-82f3-f72c3d85d684/bin/uautomizer/data/8ef7dd4cc/f47a1b6e1c35444e8c8f57d166ebed8b [2020-11-29 19:43:33,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:43:33,816 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:43:33,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:43:33,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:43:33,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:43:33,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:43:33" (1/1) ... [2020-11-29 19:43:33,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@587d57e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:33, skipping insertion in model container [2020-11-29 19:43:33,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:43:33" (1/1) ... [2020-11-29 19:43:33,839 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:43:33,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:43:34,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:43:34,125 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:43:34,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:43:34,197 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:43:34,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:34 WrapperNode [2020-11-29 19:43:34,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:43:34,203 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:43:34,203 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:43:34,203 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:43:34,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:34" (1/1) ... [2020-11-29 19:43:34,220 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:34" (1/1) ... [2020-11-29 19:43:34,243 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:43:34,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:43:34,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:43:34,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:43:34,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:34" (1/1) ... [2020-11-29 19:43:34,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:34" (1/1) ... [2020-11-29 19:43:34,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:34" (1/1) ... [2020-11-29 19:43:34,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:34" (1/1) ... [2020-11-29 19:43:34,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:34" (1/1) ... [2020-11-29 19:43:34,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:34" (1/1) ... [2020-11-29 19:43:34,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:34" (1/1) ... [2020-11-29 19:43:34,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:43:34,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:43:34,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:43:34,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:43:34,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f688d52f-e033-476d-82f3-f72c3d85d684/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 19:43:34,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:43:34,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:43:34,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:43:34,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:43:34,737 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:43:34,743 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-29 19:43:34,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:43:34 BoogieIcfgContainer [2020-11-29 19:43:34,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:43:34,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:43:34,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:43:34,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:43:34,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:43:33" (1/3) ... [2020-11-29 19:43:34,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149ca795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:43:34, skipping insertion in model container [2020-11-29 19:43:34,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:43:34" (2/3) ... [2020-11-29 19:43:34,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149ca795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:43:34, skipping insertion in model container [2020-11-29 19:43:34,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:43:34" (3/3) ... [2020-11-29 19:43:34,774 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-11-29 19:43:34,787 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:43:34,807 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 19:43:34,829 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 19:43:34,868 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:43:34,869 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:43:34,869 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:43:34,869 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:43:34,869 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:43:34,869 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:43:34,870 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:43:34,870 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:43:34,886 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-11-29 19:43:34,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 19:43:34,892 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:34,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:34,903 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:34,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:34,909 INFO L82 PathProgramCache]: Analyzing trace with hash -882170869, now seen corresponding path program 1 times [2020-11-29 19:43:34,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:34,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77715045] [2020-11-29 19:43:34,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:35,152 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 19:43:35,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77715045] [2020-11-29 19:43:35,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:35,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:35,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041909163] [2020-11-29 19:43:35,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:43:35,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:35,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:35,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:35,195 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-11-29 19:43:35,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:35,301 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-11-29 19:43:35,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:35,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-11-29 19:43:35,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:35,329 INFO L225 Difference]: With dead ends: 66 [2020-11-29 19:43:35,344 INFO L226 Difference]: Without dead ends: 51 [2020-11-29 19:43:35,347 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 19:43:35,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-29 19:43:35,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 35. [2020-11-29 19:43:35,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-29 19:43:35,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 62 transitions. [2020-11-29 19:43:35,408 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 62 transitions. Word has length 14 [2020-11-29 19:43:35,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:35,411 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 62 transitions. [2020-11-29 19:43:35,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:43:35,412 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 62 transitions. [2020-11-29 19:43:35,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 19:43:35,414 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:35,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:35,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:43:35,415 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:35,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:35,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1275197879, now seen corresponding path program 1 times [2020-11-29 19:43:35,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:35,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791565739] [2020-11-29 19:43:35,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:35,578 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 19:43:35,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791565739] [2020-11-29 19:43:35,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:35,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:35,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259464988] [2020-11-29 19:43:35,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:43:35,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:35,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:35,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:35,583 INFO L87 Difference]: Start difference. First operand 35 states and 62 transitions. Second operand 3 states. [2020-11-29 19:43:35,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:35,632 INFO L93 Difference]: Finished difference Result 84 states and 149 transitions. [2020-11-29 19:43:35,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:35,636 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-11-29 19:43:35,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:35,637 INFO L225 Difference]: With dead ends: 84 [2020-11-29 19:43:35,637 INFO L226 Difference]: Without dead ends: 51 [2020-11-29 19:43:35,639 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 19:43:35,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-29 19:43:35,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-11-29 19:43:35,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-29 19:43:35,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 86 transitions. [2020-11-29 19:43:35,657 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 86 transitions. Word has length 14 [2020-11-29 19:43:35,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:35,658 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 86 transitions. [2020-11-29 19:43:35,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:43:35,659 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 86 transitions. [2020-11-29 19:43:35,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 19:43:35,660 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:35,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:35,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 19:43:35,662 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:35,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:35,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1577278843, now seen corresponding path program 1 times [2020-11-29 19:43:35,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:35,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305831465] [2020-11-29 19:43:35,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:35,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:35,770 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 19:43:35,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305831465] [2020-11-29 19:43:35,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:35,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:35,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94111919] [2020-11-29 19:43:35,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:43:35,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:35,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:35,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:35,773 INFO L87 Difference]: Start difference. First operand 49 states and 86 transitions. Second operand 3 states. [2020-11-29 19:43:35,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:35,803 INFO L93 Difference]: Finished difference Result 78 states and 132 transitions. [2020-11-29 19:43:35,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:35,804 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-11-29 19:43:35,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:35,806 INFO L225 Difference]: With dead ends: 78 [2020-11-29 19:43:35,806 INFO L226 Difference]: Without dead ends: 54 [2020-11-29 19:43:35,807 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 19:43:35,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-29 19:43:35,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-11-29 19:43:35,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-29 19:43:35,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 88 transitions. [2020-11-29 19:43:35,816 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 88 transitions. Word has length 15 [2020-11-29 19:43:35,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:35,817 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 88 transitions. [2020-11-29 19:43:35,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:43:35,817 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 88 transitions. [2020-11-29 19:43:35,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 19:43:35,819 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:35,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:35,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 19:43:35,820 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:35,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:35,820 INFO L82 PathProgramCache]: Analyzing trace with hash -876214265, now seen corresponding path program 1 times [2020-11-29 19:43:35,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:35,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881653926] [2020-11-29 19:43:35,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:35,908 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 19:43:35,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881653926] [2020-11-29 19:43:35,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:35,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:35,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135956144] [2020-11-29 19:43:35,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:43:35,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:35,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:35,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:35,911 INFO L87 Difference]: Start difference. First operand 52 states and 88 transitions. Second operand 3 states. [2020-11-29 19:43:35,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:35,945 INFO L93 Difference]: Finished difference Result 97 states and 165 transitions. [2020-11-29 19:43:35,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:35,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-11-29 19:43:35,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:35,947 INFO L225 Difference]: With dead ends: 97 [2020-11-29 19:43:35,948 INFO L226 Difference]: Without dead ends: 95 [2020-11-29 19:43:35,948 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 19:43:35,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-11-29 19:43:35,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 69. [2020-11-29 19:43:35,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-29 19:43:35,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 117 transitions. [2020-11-29 19:43:35,972 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 117 transitions. Word has length 15 [2020-11-29 19:43:35,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:35,973 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 117 transitions. [2020-11-29 19:43:35,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:43:35,973 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 117 transitions. [2020-11-29 19:43:35,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 19:43:35,974 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:35,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:35,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 19:43:35,975 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:35,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:35,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1269241275, now seen corresponding path program 1 times [2020-11-29 19:43:35,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:35,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498729025] [2020-11-29 19:43:35,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:36,038 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 19:43:36,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498729025] [2020-11-29 19:43:36,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:36,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:36,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605967699] [2020-11-29 19:43:36,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:43:36,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:36,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:36,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:36,057 INFO L87 Difference]: Start difference. First operand 69 states and 117 transitions. Second operand 3 states. [2020-11-29 19:43:36,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:36,086 INFO L93 Difference]: Finished difference Result 161 states and 275 transitions. [2020-11-29 19:43:36,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:36,087 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-11-29 19:43:36,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:36,088 INFO L225 Difference]: With dead ends: 161 [2020-11-29 19:43:36,089 INFO L226 Difference]: Without dead ends: 97 [2020-11-29 19:43:36,090 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 19:43:36,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-29 19:43:36,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2020-11-29 19:43:36,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-29 19:43:36,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 159 transitions. [2020-11-29 19:43:36,102 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 159 transitions. Word has length 15 [2020-11-29 19:43:36,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:36,103 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 159 transitions. [2020-11-29 19:43:36,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:43:36,103 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 159 transitions. [2020-11-29 19:43:36,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 19:43:36,104 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:36,105 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:36,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 19:43:36,105 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:36,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:36,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1392623778, now seen corresponding path program 1 times [2020-11-29 19:43:36,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:36,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177796189] [2020-11-29 19:43:36,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:36,186 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 19:43:36,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177796189] [2020-11-29 19:43:36,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:36,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:36,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161617844] [2020-11-29 19:43:36,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:43:36,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:36,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:36,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:36,189 INFO L87 Difference]: Start difference. First operand 95 states and 159 transitions. Second operand 3 states. [2020-11-29 19:43:36,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:36,208 INFO L93 Difference]: Finished difference Result 144 states and 238 transitions. [2020-11-29 19:43:36,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:36,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-11-29 19:43:36,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:36,211 INFO L225 Difference]: With dead ends: 144 [2020-11-29 19:43:36,211 INFO L226 Difference]: Without dead ends: 99 [2020-11-29 19:43:36,216 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 19:43:36,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-29 19:43:36,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-11-29 19:43:36,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-29 19:43:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 159 transitions. [2020-11-29 19:43:36,228 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 159 transitions. Word has length 16 [2020-11-29 19:43:36,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:36,229 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 159 transitions. [2020-11-29 19:43:36,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:43:36,229 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 159 transitions. [2020-11-29 19:43:36,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 19:43:36,230 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:36,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:36,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 19:43:36,231 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:36,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:36,239 INFO L82 PathProgramCache]: Analyzing trace with hash -691559200, now seen corresponding path program 1 times [2020-11-29 19:43:36,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:36,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308532136] [2020-11-29 19:43:36,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:36,310 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 19:43:36,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308532136] [2020-11-29 19:43:36,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:36,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:36,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838382901] [2020-11-29 19:43:36,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:43:36,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:36,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:36,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:36,313 INFO L87 Difference]: Start difference. First operand 97 states and 159 transitions. Second operand 3 states. [2020-11-29 19:43:36,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:36,348 INFO L93 Difference]: Finished difference Result 273 states and 449 transitions. [2020-11-29 19:43:36,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:36,349 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-11-29 19:43:36,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:36,351 INFO L225 Difference]: With dead ends: 273 [2020-11-29 19:43:36,351 INFO L226 Difference]: Without dead ends: 183 [2020-11-29 19:43:36,352 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 19:43:36,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-11-29 19:43:36,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2020-11-29 19:43:36,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-11-29 19:43:36,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 291 transitions. [2020-11-29 19:43:36,383 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 291 transitions. Word has length 16 [2020-11-29 19:43:36,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:36,384 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 291 transitions. [2020-11-29 19:43:36,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:43:36,384 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 291 transitions. [2020-11-29 19:43:36,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 19:43:36,386 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:36,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:36,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-29 19:43:36,387 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:36,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:36,387 INFO L82 PathProgramCache]: Analyzing trace with hash -298532190, now seen corresponding path program 1 times [2020-11-29 19:43:36,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:36,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595899724] [2020-11-29 19:43:36,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:36,431 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 19:43:36,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595899724] [2020-11-29 19:43:36,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:36,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:36,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831134403] [2020-11-29 19:43:36,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:43:36,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:36,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:36,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:36,434 INFO L87 Difference]: Start difference. First operand 181 states and 291 transitions. Second operand 3 states. [2020-11-29 19:43:36,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:36,459 INFO L93 Difference]: Finished difference Result 225 states and 365 transitions. [2020-11-29 19:43:36,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:36,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-11-29 19:43:36,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:36,462 INFO L225 Difference]: With dead ends: 225 [2020-11-29 19:43:36,462 INFO L226 Difference]: Without dead ends: 223 [2020-11-29 19:43:36,463 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 19:43:36,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-11-29 19:43:36,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 181. [2020-11-29 19:43:36,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-11-29 19:43:36,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 287 transitions. [2020-11-29 19:43:36,489 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 287 transitions. Word has length 16 [2020-11-29 19:43:36,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:36,490 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 287 transitions. [2020-11-29 19:43:36,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:43:36,490 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 287 transitions. [2020-11-29 19:43:36,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 19:43:36,492 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:36,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:36,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-29 19:43:36,493 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:36,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:36,493 INFO L82 PathProgramCache]: Analyzing trace with hash 36716282, now seen corresponding path program 1 times [2020-11-29 19:43:36,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:36,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867500588] [2020-11-29 19:43:36,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:36,551 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 19:43:36,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867500588] [2020-11-29 19:43:36,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:36,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:36,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684408297] [2020-11-29 19:43:36,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:43:36,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:36,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:36,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:36,554 INFO L87 Difference]: Start difference. First operand 181 states and 287 transitions. Second operand 3 states. [2020-11-29 19:43:36,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:36,597 INFO L93 Difference]: Finished difference Result 325 states and 521 transitions. [2020-11-29 19:43:36,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:36,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-11-29 19:43:36,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:36,606 INFO L225 Difference]: With dead ends: 325 [2020-11-29 19:43:36,607 INFO L226 Difference]: Without dead ends: 323 [2020-11-29 19:43:36,607 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 19:43:36,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-11-29 19:43:36,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 257. [2020-11-29 19:43:36,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-11-29 19:43:36,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 399 transitions. [2020-11-29 19:43:36,633 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 399 transitions. Word has length 17 [2020-11-29 19:43:36,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:36,636 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 399 transitions. [2020-11-29 19:43:36,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:43:36,636 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 399 transitions. [2020-11-29 19:43:36,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 19:43:36,646 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:36,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:36,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-29 19:43:36,647 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:36,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:36,648 INFO L82 PathProgramCache]: Analyzing trace with hash -356310728, now seen corresponding path program 1 times [2020-11-29 19:43:36,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:36,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349328009] [2020-11-29 19:43:36,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:36,693 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 19:43:36,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349328009] [2020-11-29 19:43:36,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:36,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:36,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811675019] [2020-11-29 19:43:36,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:43:36,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:36,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:36,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:36,696 INFO L87 Difference]: Start difference. First operand 257 states and 399 transitions. Second operand 3 states. [2020-11-29 19:43:36,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:36,734 INFO L93 Difference]: Finished difference Result 597 states and 929 transitions. [2020-11-29 19:43:36,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:36,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-11-29 19:43:36,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:36,740 INFO L225 Difference]: With dead ends: 597 [2020-11-29 19:43:36,740 INFO L226 Difference]: Without dead ends: 347 [2020-11-29 19:43:36,742 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 19:43:36,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-11-29 19:43:36,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 345. [2020-11-29 19:43:36,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-11-29 19:43:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 523 transitions. [2020-11-29 19:43:36,801 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 523 transitions. Word has length 17 [2020-11-29 19:43:36,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:36,802 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 523 transitions. [2020-11-29 19:43:36,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:43:36,802 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 523 transitions. [2020-11-29 19:43:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 19:43:36,803 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:36,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:36,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-29 19:43:36,804 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:36,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:36,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1138420085, now seen corresponding path program 1 times [2020-11-29 19:43:36,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:36,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653536046] [2020-11-29 19:43:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:36,851 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 19:43:36,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653536046] [2020-11-29 19:43:36,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:36,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:36,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599846140] [2020-11-29 19:43:36,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:43:36,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:36,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:36,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:36,853 INFO L87 Difference]: Start difference. First operand 345 states and 523 transitions. Second operand 3 states. [2020-11-29 19:43:36,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:36,889 INFO L93 Difference]: Finished difference Result 525 states and 793 transitions. [2020-11-29 19:43:36,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:36,890 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-11-29 19:43:36,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:36,893 INFO L225 Difference]: With dead ends: 525 [2020-11-29 19:43:36,894 INFO L226 Difference]: Without dead ends: 359 [2020-11-29 19:43:36,895 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 19:43:36,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-11-29 19:43:36,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 357. [2020-11-29 19:43:36,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-11-29 19:43:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 531 transitions. [2020-11-29 19:43:36,914 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 531 transitions. Word has length 18 [2020-11-29 19:43:36,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:36,916 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 531 transitions. [2020-11-29 19:43:36,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:43:36,916 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 531 transitions. [2020-11-29 19:43:36,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 19:43:36,917 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:36,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:36,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-29 19:43:36,918 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:36,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:36,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1839484663, now seen corresponding path program 1 times [2020-11-29 19:43:36,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:36,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536019196] [2020-11-29 19:43:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:36,962 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 19:43:36,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536019196] [2020-11-29 19:43:36,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:36,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:36,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794690137] [2020-11-29 19:43:36,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:43:36,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:36,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:36,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:36,965 INFO L87 Difference]: Start difference. First operand 357 states and 531 transitions. Second operand 3 states. [2020-11-29 19:43:36,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:36,995 INFO L93 Difference]: Finished difference Result 617 states and 925 transitions. [2020-11-29 19:43:36,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:36,998 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-11-29 19:43:36,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:37,002 INFO L225 Difference]: With dead ends: 617 [2020-11-29 19:43:37,003 INFO L226 Difference]: Without dead ends: 615 [2020-11-29 19:43:37,005 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 19:43:37,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2020-11-29 19:43:37,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 517. [2020-11-29 19:43:37,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-11-29 19:43:37,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 747 transitions. [2020-11-29 19:43:37,030 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 747 transitions. Word has length 18 [2020-11-29 19:43:37,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:37,030 INFO L481 AbstractCegarLoop]: Abstraction has 517 states and 747 transitions. [2020-11-29 19:43:37,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:43:37,031 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 747 transitions. [2020-11-29 19:43:37,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 19:43:37,032 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:37,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:37,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-29 19:43:37,033 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:37,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:37,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1446457653, now seen corresponding path program 1 times [2020-11-29 19:43:37,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:37,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788120288] [2020-11-29 19:43:37,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:37,064 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 19:43:37,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788120288] [2020-11-29 19:43:37,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:37,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:37,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120957245] [2020-11-29 19:43:37,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:43:37,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:37,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:37,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:37,066 INFO L87 Difference]: Start difference. First operand 517 states and 747 transitions. Second operand 3 states. [2020-11-29 19:43:37,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:37,103 INFO L93 Difference]: Finished difference Result 1177 states and 1693 transitions. [2020-11-29 19:43:37,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:37,104 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-11-29 19:43:37,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:37,109 INFO L225 Difference]: With dead ends: 1177 [2020-11-29 19:43:37,109 INFO L226 Difference]: Without dead ends: 679 [2020-11-29 19:43:37,110 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 19:43:37,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-11-29 19:43:37,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 677. [2020-11-29 19:43:37,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2020-11-29 19:43:37,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 947 transitions. [2020-11-29 19:43:37,146 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 947 transitions. Word has length 18 [2020-11-29 19:43:37,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:37,149 INFO L481 AbstractCegarLoop]: Abstraction has 677 states and 947 transitions. [2020-11-29 19:43:37,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:43:37,149 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 947 transitions. [2020-11-29 19:43:37,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 19:43:37,150 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:37,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:37,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-29 19:43:37,151 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:37,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:37,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1189665389, now seen corresponding path program 1 times [2020-11-29 19:43:37,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:37,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687822569] [2020-11-29 19:43:37,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:37,200 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 19:43:37,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687822569] [2020-11-29 19:43:37,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:37,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:37,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320967611] [2020-11-29 19:43:37,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:43:37,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:37,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:37,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:37,205 INFO L87 Difference]: Start difference. First operand 677 states and 947 transitions. Second operand 3 states. [2020-11-29 19:43:37,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:37,237 INFO L93 Difference]: Finished difference Result 1017 states and 1413 transitions. [2020-11-29 19:43:37,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:37,238 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-11-29 19:43:37,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:37,243 INFO L225 Difference]: With dead ends: 1017 [2020-11-29 19:43:37,244 INFO L226 Difference]: Without dead ends: 695 [2020-11-29 19:43:37,248 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 19:43:37,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2020-11-29 19:43:37,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 693. [2020-11-29 19:43:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2020-11-29 19:43:37,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 947 transitions. [2020-11-29 19:43:37,291 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 947 transitions. Word has length 19 [2020-11-29 19:43:37,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:37,291 INFO L481 AbstractCegarLoop]: Abstraction has 693 states and 947 transitions. [2020-11-29 19:43:37,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:43:37,291 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 947 transitions. [2020-11-29 19:43:37,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 19:43:37,294 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:37,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:37,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-29 19:43:37,295 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:37,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:37,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1890729967, now seen corresponding path program 1 times [2020-11-29 19:43:37,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:37,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133160092] [2020-11-29 19:43:37,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:37,336 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 19:43:37,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133160092] [2020-11-29 19:43:37,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:37,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:37,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172752713] [2020-11-29 19:43:37,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:43:37,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:37,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:37,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:37,338 INFO L87 Difference]: Start difference. First operand 693 states and 947 transitions. Second operand 3 states. [2020-11-29 19:43:37,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:37,381 INFO L93 Difference]: Finished difference Result 1161 states and 1589 transitions. [2020-11-29 19:43:37,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:37,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-11-29 19:43:37,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:37,391 INFO L225 Difference]: With dead ends: 1161 [2020-11-29 19:43:37,391 INFO L226 Difference]: Without dead ends: 1159 [2020-11-29 19:43:37,394 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 19:43:37,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2020-11-29 19:43:37,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1029. [2020-11-29 19:43:37,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1029 states. [2020-11-29 19:43:37,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1363 transitions. [2020-11-29 19:43:37,434 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1363 transitions. Word has length 19 [2020-11-29 19:43:37,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:37,434 INFO L481 AbstractCegarLoop]: Abstraction has 1029 states and 1363 transitions. [2020-11-29 19:43:37,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:43:37,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1363 transitions. [2020-11-29 19:43:37,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 19:43:37,439 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:37,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:43:37,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-29 19:43:37,439 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:37,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:37,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1497702957, now seen corresponding path program 1 times [2020-11-29 19:43:37,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:37,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025510279] [2020-11-29 19:43:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:37,481 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 19:43:37,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025510279] [2020-11-29 19:43:37,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:37,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:37,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075703695] [2020-11-29 19:43:37,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:43:37,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:37,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:37,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:37,483 INFO L87 Difference]: Start difference. First operand 1029 states and 1363 transitions. Second operand 3 states. [2020-11-29 19:43:37,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:37,536 INFO L93 Difference]: Finished difference Result 2313 states and 3029 transitions. [2020-11-29 19:43:37,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:37,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-11-29 19:43:37,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:37,545 INFO L225 Difference]: With dead ends: 2313 [2020-11-29 19:43:37,546 INFO L226 Difference]: Without dead ends: 1319 [2020-11-29 19:43:37,548 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 19:43:37,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2020-11-29 19:43:37,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1317. [2020-11-29 19:43:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1317 states. [2020-11-29 19:43:37,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 1667 transitions. [2020-11-29 19:43:37,607 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 1667 transitions. Word has length 19 [2020-11-29 19:43:37,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:37,607 INFO L481 AbstractCegarLoop]: Abstraction has 1317 states and 1667 transitions. [2020-11-29 19:43:37,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:43:37,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 1667 transitions. [2020-11-29 19:43:37,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 19:43:37,609 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:37,617 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] [2020-11-29 19:43:37,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-29 19:43:37,618 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:37,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:37,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1516697142, now seen corresponding path program 1 times [2020-11-29 19:43:37,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:37,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598694025] [2020-11-29 19:43:37,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:37,650 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 19:43:37,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598694025] [2020-11-29 19:43:37,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:37,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:37,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262369345] [2020-11-29 19:43:37,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:43:37,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:37,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:37,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:37,653 INFO L87 Difference]: Start difference. First operand 1317 states and 1667 transitions. Second operand 3 states. [2020-11-29 19:43:37,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:37,718 INFO L93 Difference]: Finished difference Result 1977 states and 2485 transitions. [2020-11-29 19:43:37,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:37,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-11-29 19:43:37,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:37,729 INFO L225 Difference]: With dead ends: 1977 [2020-11-29 19:43:37,729 INFO L226 Difference]: Without dead ends: 1351 [2020-11-29 19:43:37,731 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 19:43:37,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2020-11-29 19:43:37,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1349. [2020-11-29 19:43:37,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1349 states. [2020-11-29 19:43:37,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 1667 transitions. [2020-11-29 19:43:37,801 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 1667 transitions. Word has length 20 [2020-11-29 19:43:37,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:37,801 INFO L481 AbstractCegarLoop]: Abstraction has 1349 states and 1667 transitions. [2020-11-29 19:43:37,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:43:37,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 1667 transitions. [2020-11-29 19:43:37,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 19:43:37,804 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:37,804 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] [2020-11-29 19:43:37,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-29 19:43:37,805 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:37,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:37,805 INFO L82 PathProgramCache]: Analyzing trace with hash -815632564, now seen corresponding path program 1 times [2020-11-29 19:43:37,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:37,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060352904] [2020-11-29 19:43:37,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:37,834 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 19:43:37,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060352904] [2020-11-29 19:43:37,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:37,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:37,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762269831] [2020-11-29 19:43:37,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:43:37,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:37,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:37,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:37,837 INFO L87 Difference]: Start difference. First operand 1349 states and 1667 transitions. Second operand 3 states. [2020-11-29 19:43:37,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:37,901 INFO L93 Difference]: Finished difference Result 2183 states and 2660 transitions. [2020-11-29 19:43:37,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:37,902 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-11-29 19:43:37,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:37,916 INFO L225 Difference]: With dead ends: 2183 [2020-11-29 19:43:37,916 INFO L226 Difference]: Without dead ends: 2181 [2020-11-29 19:43:37,917 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 19:43:37,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2020-11-29 19:43:37,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2053. [2020-11-29 19:43:37,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2053 states. [2020-11-29 19:43:38,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 2467 transitions. [2020-11-29 19:43:38,000 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 2467 transitions. Word has length 20 [2020-11-29 19:43:38,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:38,001 INFO L481 AbstractCegarLoop]: Abstraction has 2053 states and 2467 transitions. [2020-11-29 19:43:38,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:43:38,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 2467 transitions. [2020-11-29 19:43:38,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 19:43:38,006 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:43:38,006 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] [2020-11-29 19:43:38,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-29 19:43:38,006 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:43:38,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:43:38,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1208659574, now seen corresponding path program 1 times [2020-11-29 19:43:38,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:43:38,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124690072] [2020-11-29 19:43:38,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:43:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:43:38,035 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 19:43:38,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124690072] [2020-11-29 19:43:38,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:43:38,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:43:38,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142511311] [2020-11-29 19:43:38,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:43:38,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:43:38,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:43:38,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:43:38,037 INFO L87 Difference]: Start difference. First operand 2053 states and 2467 transitions. Second operand 3 states. [2020-11-29 19:43:38,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:43:38,125 INFO L93 Difference]: Finished difference Result 4549 states and 5347 transitions. [2020-11-29 19:43:38,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:43:38,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-11-29 19:43:38,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:43:38,126 INFO L225 Difference]: With dead ends: 4549 [2020-11-29 19:43:38,126 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 19:43:38,134 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 19:43:38,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 19:43:38,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 19:43:38,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 19:43:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 19:43:38,135 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2020-11-29 19:43:38,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:43:38,135 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:43:38,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:43:38,135 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 19:43:38,135 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 19:43:38,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-29 19:43:38,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 19:43:38,159 INFO L274 CegarLoopResult]: For program point L93-1(lines 32 118) no Hoare annotation was computed. [2020-11-29 19:43:38,160 INFO L274 CegarLoopResult]: For program point L77-1(lines 32 118) no Hoare annotation was computed. [2020-11-29 19:43:38,160 INFO L274 CegarLoopResult]: For program point L69-1(lines 32 118) no Hoare annotation was computed. [2020-11-29 19:43:38,160 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-11-29 19:43:38,160 INFO L274 CegarLoopResult]: For program point L94(line 94) no Hoare annotation was computed. [2020-11-29 19:43:38,160 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 19:43:38,160 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 19:43:38,160 INFO L274 CegarLoopResult]: For program point L61-1(lines 32 118) no Hoare annotation was computed. [2020-11-29 19:43:38,161 INFO L277 CegarLoopResult]: At program point L119(lines 7 123) the Hoare annotation is: true [2020-11-29 19:43:38,161 INFO L274 CegarLoopResult]: For program point L53(lines 53 55) no Hoare annotation was computed. [2020-11-29 19:43:38,161 INFO L274 CegarLoopResult]: For program point L53-2(lines 32 118) no Hoare annotation was computed. [2020-11-29 19:43:38,161 INFO L274 CegarLoopResult]: For program point L103-1(lines 32 118) no Hoare annotation was computed. [2020-11-29 19:43:38,184 INFO L274 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-11-29 19:43:38,185 INFO L274 CegarLoopResult]: For program point L88-1(lines 32 118) no Hoare annotation was computed. [2020-11-29 19:43:38,185 INFO L277 CegarLoopResult]: At program point L113-1(lines 32 118) the Hoare annotation is: true [2020-11-29 19:43:38,185 INFO L277 CegarLoopResult]: At program point L122(lines 6 123) the Hoare annotation is: true [2020-11-29 19:43:38,185 INFO L274 CegarLoopResult]: For program point L89(line 89) no Hoare annotation was computed. [2020-11-29 19:43:38,185 INFO L274 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-11-29 19:43:38,185 INFO L270 CegarLoopResult]: At program point L114-1(lines 7 123) the Hoare annotation is: false [2020-11-29 19:43:38,185 INFO L274 CegarLoopResult]: For program point L73-1(lines 32 118) no Hoare annotation was computed. [2020-11-29 19:43:38,186 INFO L274 CegarLoopResult]: For program point L98-1(lines 32 118) no Hoare annotation was computed. [2020-11-29 19:43:38,186 INFO L274 CegarLoopResult]: For program point L65-1(lines 32 118) no Hoare annotation was computed. [2020-11-29 19:43:38,186 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 19:43:38,186 INFO L274 CegarLoopResult]: For program point L57-1(lines 32 118) no Hoare annotation was computed. [2020-11-29 19:43:38,186 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-29 19:43:38,186 INFO L274 CegarLoopResult]: For program point L99(line 99) no Hoare annotation was computed. [2020-11-29 19:43:38,186 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 19:43:38,186 INFO L274 CegarLoopResult]: For program point L83-1(lines 32 118) no Hoare annotation was computed. [2020-11-29 19:43:38,187 INFO L274 CegarLoopResult]: For program point L108-1(lines 32 118) no Hoare annotation was computed. [2020-11-29 19:43:38,187 INFO L274 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-11-29 19:43:38,187 INFO L274 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-11-29 19:43:38,187 INFO L274 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-11-29 19:43:38,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:43:38 BoogieIcfgContainer [2020-11-29 19:43:38,200 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:43:38,201 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:43:38,201 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:43:38,201 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:43:38,202 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:43:34" (3/4) ... [2020-11-29 19:43:38,205 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 19:43:38,221 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-29 19:43:38,221 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 19:43:38,222 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 19:43:38,222 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 19:43:38,291 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f688d52f-e033-476d-82f3-f72c3d85d684/bin/uautomizer/witness.graphml [2020-11-29 19:43:38,292 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:43:38,294 INFO L168 Benchmark]: Toolchain (without parser) took 4477.19 ms. Allocated memory was 98.6 MB in the beginning and 148.9 MB in the end (delta: 50.3 MB). Free memory was 70.0 MB in the beginning and 118.1 MB in the end (delta: -48.1 MB). Peak memory consumption was 2.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:43:38,294 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 98.6 MB. Free memory is still 55.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:43:38,295 INFO L168 Benchmark]: CACSL2BoogieTranslator took 381.88 ms. Allocated memory is still 98.6 MB. Free memory was 69.7 MB in the beginning and 75.5 MB in the end (delta: -5.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:43:38,296 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.04 ms. Allocated memory is still 98.6 MB. Free memory was 75.5 MB in the beginning and 73.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:43:38,296 INFO L168 Benchmark]: Boogie Preprocessor took 29.30 ms. Allocated memory is still 98.6 MB. Free memory was 73.9 MB in the beginning and 72.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:43:38,297 INFO L168 Benchmark]: RCFGBuilder took 471.51 ms. Allocated memory is still 98.6 MB. Free memory was 72.8 MB in the beginning and 56.2 MB in the end (delta: 16.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-29 19:43:38,297 INFO L168 Benchmark]: TraceAbstraction took 3434.88 ms. Allocated memory was 98.6 MB in the beginning and 148.9 MB in the end (delta: 50.3 MB). Free memory was 55.9 MB in the beginning and 121.2 MB in the end (delta: -65.4 MB). Peak memory consumption was 64.6 MB. Max. memory is 16.1 GB. [2020-11-29 19:43:38,298 INFO L168 Benchmark]: Witness Printer took 90.95 ms. Allocated memory is still 148.9 MB. Free memory was 121.2 MB in the beginning and 118.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 19:43:38,300 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 98.6 MB. Free memory is still 55.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 381.88 ms. Allocated memory is still 98.6 MB. Free memory was 69.7 MB in the beginning and 75.5 MB in the end (delta: -5.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.04 ms. Allocated memory is still 98.6 MB. Free memory was 75.5 MB in the beginning and 73.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.30 ms. Allocated memory is still 98.6 MB. Free memory was 73.9 MB in the beginning and 72.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 471.51 ms. Allocated memory is still 98.6 MB. Free memory was 72.8 MB in the beginning and 56.2 MB in the end (delta: 16.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3434.88 ms. Allocated memory was 98.6 MB in the beginning and 148.9 MB in the end (delta: 50.3 MB). Free memory was 55.9 MB in the beginning and 121.2 MB in the end (delta: -65.4 MB). Peak memory consumption was 64.6 MB. Max. memory is 16.1 GB. * Witness Printer took 90.95 ms. Allocated memory is still 148.9 MB. Free memory was 121.2 MB in the beginning and 118.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 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: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.2s, OverallIterations: 19, TraceHistogramMax: 1, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1128 SDtfs, 543 SDslu, 729 SDs, 0 SdLazy, 101 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2053occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 19 MinimizatonAttempts, 528 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 137 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 326 NumberOfCodeBlocks, 326 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 307 ConstructedInterpolants, 0 QuantifiedInterpolants, 10138 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 19 PerfectInterpolantSequences, 0/0 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...