./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_srvr_12.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_caf02cd2-6eb9-49c3-af2e-936e16a0b136/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_caf02cd2-6eb9-49c3-af2e-936e16a0b136/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_caf02cd2-6eb9-49c3-af2e-936e16a0b136/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_caf02cd2-6eb9-49c3-af2e-936e16a0b136/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_srvr_12.cil.c -s /tmp/vcloud-vcloud-master/worker/run_dir_caf02cd2-6eb9-49c3-af2e-936e16a0b136/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_caf02cd2-6eb9-49c3-af2e-936e16a0b136/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8822f5291178e45ba1da62c4d4636880280d6cc4 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:14:36,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:14:36,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:14:36,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:14:36,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:14:36,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:14:36,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:14:36,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:14:36,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:14:36,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:14:36,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:14:36,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:14:36,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:14:36,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:14:36,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:14:36,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:14:36,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:14:36,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:14:36,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:14:36,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:14:36,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:14:36,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:14:36,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:14:36,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:14:36,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:14:36,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:14:36,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:14:36,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:14:36,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:14:36,936 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:14:36,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:14:36,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:14:36,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:14:36,941 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:14:36,942 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:14:36,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:14:36,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:14:36,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:14:36,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:14:36,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:14:36,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:14:36,947 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_caf02cd2-6eb9-49c3-af2e-936e16a0b136/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 00:14:36,992 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:14:36,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:14:36,993 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:14:36,994 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:14:36,994 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:14:36,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:14:36,994 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:14:36,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:14:36,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:14:36,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:14:36,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 00:14:37,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 00:14:37,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 00:14:37,000 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:14:37,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:14:37,001 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:14:37,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 00:14:37,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:14:37,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:14:37,001 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 00:14:37,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 00:14:37,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:14:37,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:14:37,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 00:14:37,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 00:14:37,003 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:14:37,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 00:14:37,003 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 00:14:37,004 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:14:37,004 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_caf02cd2-6eb9-49c3-af2e-936e16a0b136/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_caf02cd2-6eb9-49c3-af2e-936e16a0b136/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8822f5291178e45ba1da62c4d4636880280d6cc4 [2020-11-30 00:14:37,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:14:37,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:14:37,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:14:37,321 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:14:37,325 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:14:37,326 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_caf02cd2-6eb9-49c3-af2e-936e16a0b136/bin/uautomizer/../../sv-benchmarks/c/openssl-simplified/s3_srvr_12.cil.c [2020-11-30 00:14:37,407 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_caf02cd2-6eb9-49c3-af2e-936e16a0b136/bin/uautomizer/data/9f4decbf1/f4f6c3af9c0c4b75b2a7c953af7c5a43/FLAG3d5453109 [2020-11-30 00:14:38,038 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:14:38,051 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_caf02cd2-6eb9-49c3-af2e-936e16a0b136/sv-benchmarks/c/openssl-simplified/s3_srvr_12.cil.c [2020-11-30 00:14:38,069 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_caf02cd2-6eb9-49c3-af2e-936e16a0b136/bin/uautomizer/data/9f4decbf1/f4f6c3af9c0c4b75b2a7c953af7c5a43/FLAG3d5453109 [2020-11-30 00:14:38,360 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_caf02cd2-6eb9-49c3-af2e-936e16a0b136/bin/uautomizer/data/9f4decbf1/f4f6c3af9c0c4b75b2a7c953af7c5a43 [2020-11-30 00:14:38,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:14:38,368 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:14:38,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:14:38,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:14:38,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:14:38,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:14:38" (1/1) ... [2020-11-30 00:14:38,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c04a06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:14:38, skipping insertion in model container [2020-11-30 00:14:38,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:14:38" (1/1) ... [2020-11-30 00:14:38,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:14:38,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:14:38,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:14:38,835 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:14:38,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:14:38,953 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:14:38,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:14:38 WrapperNode [2020-11-30 00:14:38,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:14:38,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:14:38,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:14:38,956 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:14:38,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:14:38" (1/1) ... [2020-11-30 00:14:38,980 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:14:38" (1/1) ... [2020-11-30 00:14:39,027 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:14:39,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:14:39,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:14:39,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:14:39,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:14:38" (1/1) ... [2020-11-30 00:14:39,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:14:38" (1/1) ... [2020-11-30 00:14:39,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:14:38" (1/1) ... [2020-11-30 00:14:39,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:14:38" (1/1) ... [2020-11-30 00:14:39,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:14:38" (1/1) ... [2020-11-30 00:14:39,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:14:38" (1/1) ... [2020-11-30 00:14:39,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:14:38" (1/1) ... [2020-11-30 00:14:39,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:14:39,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:14:39,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:14:39,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:14:39,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:14:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_caf02cd2-6eb9-49c3-af2e-936e16a0b136/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 [2020-11-30 00:14:39,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:14:39,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:14:39,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:14:39,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:14:39,348 WARN L798 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-11-30 00:14:40,203 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-11-30 00:14:40,204 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-11-30 00:14:40,218 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:14:40,219 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-30 00:14:40,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:14:40 BoogieIcfgContainer [2020-11-30 00:14:40,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:14:40,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 00:14:40,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 00:14:40,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 00:14:40,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 12:14:38" (1/3) ... [2020-11-30 00:14:40,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba820ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:14:40, skipping insertion in model container [2020-11-30 00:14:40,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:14:38" (2/3) ... [2020-11-30 00:14:40,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba820ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:14:40, skipping insertion in model container [2020-11-30 00:14:40,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:14:40" (3/3) ... [2020-11-30 00:14:40,233 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_12.cil.c [2020-11-30 00:14:40,244 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 00:14:40,248 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 00:14:40,262 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 00:14:40,289 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 00:14:40,289 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 00:14:40,289 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 00:14:40,290 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:14:40,290 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:14:40,290 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 00:14:40,290 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:14:40,290 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 00:14:40,306 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states. [2020-11-30 00:14:40,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 00:14:40,313 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:40,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:40,314 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:40,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:40,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1659372905, now seen corresponding path program 1 times [2020-11-30 00:14:40,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:40,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027019756] [2020-11-30 00:14:40,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:40,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:14:40,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027019756] [2020-11-30 00:14:40,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:40,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:40,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296315501] [2020-11-30 00:14:40,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:40,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:40,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:40,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:40,588 INFO L87 Difference]: Start difference. First operand 168 states. Second operand 3 states. [2020-11-30 00:14:41,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:41,017 INFO L93 Difference]: Finished difference Result 354 states and 614 transitions. [2020-11-30 00:14:41,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:41,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-11-30 00:14:41,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:41,053 INFO L225 Difference]: With dead ends: 354 [2020-11-30 00:14:41,063 INFO L226 Difference]: Without dead ends: 174 [2020-11-30 00:14:41,068 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 [2020-11-30 00:14:41,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-11-30 00:14:41,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2020-11-30 00:14:41,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-11-30 00:14:41,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 277 transitions. [2020-11-30 00:14:41,175 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 277 transitions. Word has length 28 [2020-11-30 00:14:41,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:41,177 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 277 transitions. [2020-11-30 00:14:41,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:41,178 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 277 transitions. [2020-11-30 00:14:41,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-30 00:14:41,182 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:41,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:41,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 00:14:41,183 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:41,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:41,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1067837001, now seen corresponding path program 1 times [2020-11-30 00:14:41,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:41,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440592942] [2020-11-30 00:14:41,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:14:41,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440592942] [2020-11-30 00:14:41,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:41,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:41,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80956221] [2020-11-30 00:14:41,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:41,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:41,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:41,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:41,346 INFO L87 Difference]: Start difference. First operand 172 states and 277 transitions. Second operand 3 states. [2020-11-30 00:14:41,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:41,588 INFO L93 Difference]: Finished difference Result 358 states and 575 transitions. [2020-11-30 00:14:41,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:41,589 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-11-30 00:14:41,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:41,592 INFO L225 Difference]: With dead ends: 358 [2020-11-30 00:14:41,592 INFO L226 Difference]: Without dead ends: 194 [2020-11-30 00:14:41,594 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 [2020-11-30 00:14:41,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-11-30 00:14:41,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2020-11-30 00:14:41,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-11-30 00:14:41,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 307 transitions. [2020-11-30 00:14:41,619 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 307 transitions. Word has length 29 [2020-11-30 00:14:41,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:41,619 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 307 transitions. [2020-11-30 00:14:41,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:41,620 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 307 transitions. [2020-11-30 00:14:41,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-30 00:14:41,621 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:41,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:41,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 00:14:41,622 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:41,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:41,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1369735938, now seen corresponding path program 1 times [2020-11-30 00:14:41,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:41,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211692313] [2020-11-30 00:14:41,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:14:41,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211692313] [2020-11-30 00:14:41,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:41,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:41,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719059520] [2020-11-30 00:14:41,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:41,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:41,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:41,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:41,737 INFO L87 Difference]: Start difference. First operand 194 states and 307 transitions. Second operand 3 states. [2020-11-30 00:14:42,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:42,178 INFO L93 Difference]: Finished difference Result 388 states and 616 transitions. [2020-11-30 00:14:42,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:42,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-11-30 00:14:42,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:42,181 INFO L225 Difference]: With dead ends: 388 [2020-11-30 00:14:42,181 INFO L226 Difference]: Without dead ends: 202 [2020-11-30 00:14:42,183 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 [2020-11-30 00:14:42,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-11-30 00:14:42,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2020-11-30 00:14:42,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-11-30 00:14:42,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 318 transitions. [2020-11-30 00:14:42,205 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 318 transitions. Word has length 29 [2020-11-30 00:14:42,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:42,205 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 318 transitions. [2020-11-30 00:14:42,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:42,206 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 318 transitions. [2020-11-30 00:14:42,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-30 00:14:42,207 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:42,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:42,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 00:14:42,208 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:42,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:42,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1614302654, now seen corresponding path program 1 times [2020-11-30 00:14:42,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:42,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160397655] [2020-11-30 00:14:42,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:14:42,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160397655] [2020-11-30 00:14:42,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:42,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:42,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221435544] [2020-11-30 00:14:42,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:42,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:42,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:42,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:42,299 INFO L87 Difference]: Start difference. First operand 200 states and 318 transitions. Second operand 3 states. [2020-11-30 00:14:42,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:42,537 INFO L93 Difference]: Finished difference Result 393 states and 626 transitions. [2020-11-30 00:14:42,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:42,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-11-30 00:14:42,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:42,540 INFO L225 Difference]: With dead ends: 393 [2020-11-30 00:14:42,540 INFO L226 Difference]: Without dead ends: 201 [2020-11-30 00:14:42,541 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 [2020-11-30 00:14:42,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-11-30 00:14:42,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2020-11-30 00:14:42,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-11-30 00:14:42,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 319 transitions. [2020-11-30 00:14:42,572 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 319 transitions. Word has length 29 [2020-11-30 00:14:42,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:42,573 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 319 transitions. [2020-11-30 00:14:42,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:42,573 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 319 transitions. [2020-11-30 00:14:42,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-30 00:14:42,579 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:42,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:42,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 00:14:42,580 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:42,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:42,581 INFO L82 PathProgramCache]: Analyzing trace with hash -210698213, now seen corresponding path program 1 times [2020-11-30 00:14:42,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:42,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723099424] [2020-11-30 00:14:42,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:14:42,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723099424] [2020-11-30 00:14:42,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:42,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:42,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132768410] [2020-11-30 00:14:42,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:42,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:42,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:42,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:42,670 INFO L87 Difference]: Start difference. First operand 201 states and 319 transitions. Second operand 3 states. [2020-11-30 00:14:42,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:42,891 INFO L93 Difference]: Finished difference Result 404 states and 638 transitions. [2020-11-30 00:14:42,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:42,892 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-11-30 00:14:42,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:42,894 INFO L225 Difference]: With dead ends: 404 [2020-11-30 00:14:42,894 INFO L226 Difference]: Without dead ends: 211 [2020-11-30 00:14:42,895 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 [2020-11-30 00:14:42,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-11-30 00:14:42,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 201. [2020-11-30 00:14:42,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-11-30 00:14:42,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 317 transitions. [2020-11-30 00:14:42,915 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 317 transitions. Word has length 30 [2020-11-30 00:14:42,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:42,916 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 317 transitions. [2020-11-30 00:14:42,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:42,917 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 317 transitions. [2020-11-30 00:14:42,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-30 00:14:42,922 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:42,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:42,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 00:14:42,923 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:42,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:42,926 INFO L82 PathProgramCache]: Analyzing trace with hash -852120702, now seen corresponding path program 1 times [2020-11-30 00:14:42,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:42,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823911698] [2020-11-30 00:14:42,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:14:42,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823911698] [2020-11-30 00:14:42,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:42,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:42,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66078011] [2020-11-30 00:14:42,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:42,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:42,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:42,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:42,990 INFO L87 Difference]: Start difference. First operand 201 states and 317 transitions. Second operand 3 states. [2020-11-30 00:14:43,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:43,229 INFO L93 Difference]: Finished difference Result 404 states and 634 transitions. [2020-11-30 00:14:43,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:43,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-11-30 00:14:43,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:43,232 INFO L225 Difference]: With dead ends: 404 [2020-11-30 00:14:43,232 INFO L226 Difference]: Without dead ends: 211 [2020-11-30 00:14:43,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:43,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-11-30 00:14:43,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 201. [2020-11-30 00:14:43,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-11-30 00:14:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 315 transitions. [2020-11-30 00:14:43,249 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 315 transitions. Word has length 31 [2020-11-30 00:14:43,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:43,250 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 315 transitions. [2020-11-30 00:14:43,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:43,250 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 315 transitions. [2020-11-30 00:14:43,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-30 00:14:43,252 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:43,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:43,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-30 00:14:43,253 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:43,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:43,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1795373184, now seen corresponding path program 1 times [2020-11-30 00:14:43,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:43,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401429477] [2020-11-30 00:14:43,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:14:43,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401429477] [2020-11-30 00:14:43,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:43,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:43,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091663753] [2020-11-30 00:14:43,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:43,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:43,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:43,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:43,330 INFO L87 Difference]: Start difference. First operand 201 states and 315 transitions. Second operand 3 states. [2020-11-30 00:14:43,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:43,559 INFO L93 Difference]: Finished difference Result 404 states and 630 transitions. [2020-11-30 00:14:43,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:43,560 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-11-30 00:14:43,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:43,562 INFO L225 Difference]: With dead ends: 404 [2020-11-30 00:14:43,562 INFO L226 Difference]: Without dead ends: 211 [2020-11-30 00:14:43,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:43,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-11-30 00:14:43,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 201. [2020-11-30 00:14:43,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-11-30 00:14:43,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 313 transitions. [2020-11-30 00:14:43,573 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 313 transitions. Word has length 32 [2020-11-30 00:14:43,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:43,573 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 313 transitions. [2020-11-30 00:14:43,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:43,574 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 313 transitions. [2020-11-30 00:14:43,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-30 00:14:43,574 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:43,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:43,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-30 00:14:43,575 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:43,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:43,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1439838815, now seen corresponding path program 1 times [2020-11-30 00:14:43,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:43,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083210715] [2020-11-30 00:14:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:14:43,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083210715] [2020-11-30 00:14:43,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:43,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:14:43,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122112246] [2020-11-30 00:14:43,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:14:43,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:43,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:14:43,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:14:43,653 INFO L87 Difference]: Start difference. First operand 201 states and 313 transitions. Second operand 4 states. [2020-11-30 00:14:44,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:44,129 INFO L93 Difference]: Finished difference Result 600 states and 930 transitions. [2020-11-30 00:14:44,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 00:14:44,130 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-11-30 00:14:44,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:44,133 INFO L225 Difference]: With dead ends: 600 [2020-11-30 00:14:44,136 INFO L226 Difference]: Without dead ends: 407 [2020-11-30 00:14:44,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:14:44,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-11-30 00:14:44,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 383. [2020-11-30 00:14:44,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-11-30 00:14:44,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 595 transitions. [2020-11-30 00:14:44,170 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 595 transitions. Word has length 32 [2020-11-30 00:14:44,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:44,171 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 595 transitions. [2020-11-30 00:14:44,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:14:44,171 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 595 transitions. [2020-11-30 00:14:44,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-30 00:14:44,174 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:44,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:44,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-30 00:14:44,175 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:44,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:44,176 INFO L82 PathProgramCache]: Analyzing trace with hash -443745160, now seen corresponding path program 1 times [2020-11-30 00:14:44,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:44,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526205090] [2020-11-30 00:14:44,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:44,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:14:44,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526205090] [2020-11-30 00:14:44,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:44,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:44,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095397035] [2020-11-30 00:14:44,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:44,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:44,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:44,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:44,259 INFO L87 Difference]: Start difference. First operand 383 states and 595 transitions. Second operand 3 states. [2020-11-30 00:14:44,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:44,563 INFO L93 Difference]: Finished difference Result 842 states and 1324 transitions. [2020-11-30 00:14:44,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:44,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-11-30 00:14:44,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:44,569 INFO L225 Difference]: With dead ends: 842 [2020-11-30 00:14:44,571 INFO L226 Difference]: Without dead ends: 467 [2020-11-30 00:14:44,573 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 [2020-11-30 00:14:44,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-11-30 00:14:44,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 449. [2020-11-30 00:14:44,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2020-11-30 00:14:44,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 710 transitions. [2020-11-30 00:14:44,615 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 710 transitions. Word has length 44 [2020-11-30 00:14:44,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:44,619 INFO L481 AbstractCegarLoop]: Abstraction has 449 states and 710 transitions. [2020-11-30 00:14:44,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:44,619 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 710 transitions. [2020-11-30 00:14:44,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-30 00:14:44,620 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:44,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:44,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-30 00:14:44,621 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:44,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:44,623 INFO L82 PathProgramCache]: Analyzing trace with hash 974176282, now seen corresponding path program 1 times [2020-11-30 00:14:44,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:44,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195287247] [2020-11-30 00:14:44,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:14:44,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195287247] [2020-11-30 00:14:44,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:44,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:44,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475754272] [2020-11-30 00:14:44,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:44,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:44,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:44,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:44,759 INFO L87 Difference]: Start difference. First operand 449 states and 710 transitions. Second operand 3 states. [2020-11-30 00:14:45,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:45,083 INFO L93 Difference]: Finished difference Result 931 states and 1482 transitions. [2020-11-30 00:14:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:45,084 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-11-30 00:14:45,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:45,088 INFO L225 Difference]: With dead ends: 931 [2020-11-30 00:14:45,088 INFO L226 Difference]: Without dead ends: 490 [2020-11-30 00:14:45,089 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 [2020-11-30 00:14:45,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-11-30 00:14:45,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 472. [2020-11-30 00:14:45,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2020-11-30 00:14:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 753 transitions. [2020-11-30 00:14:45,124 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 753 transitions. Word has length 45 [2020-11-30 00:14:45,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:45,124 INFO L481 AbstractCegarLoop]: Abstraction has 472 states and 753 transitions. [2020-11-30 00:14:45,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:45,125 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 753 transitions. [2020-11-30 00:14:45,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-30 00:14:45,126 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:45,127 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:45,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-30 00:14:45,127 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:45,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:45,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1540899075, now seen corresponding path program 1 times [2020-11-30 00:14:45,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:45,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72564253] [2020-11-30 00:14:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 00:14:45,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72564253] [2020-11-30 00:14:45,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:45,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:45,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506706713] [2020-11-30 00:14:45,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:45,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:45,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:45,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:45,185 INFO L87 Difference]: Start difference. First operand 472 states and 753 transitions. Second operand 3 states. [2020-11-30 00:14:45,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:45,435 INFO L93 Difference]: Finished difference Result 988 states and 1578 transitions. [2020-11-30 00:14:45,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:45,436 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-11-30 00:14:45,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:45,440 INFO L225 Difference]: With dead ends: 988 [2020-11-30 00:14:45,440 INFO L226 Difference]: Without dead ends: 524 [2020-11-30 00:14:45,442 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 [2020-11-30 00:14:45,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-11-30 00:14:45,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 506. [2020-11-30 00:14:45,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-11-30 00:14:45,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 804 transitions. [2020-11-30 00:14:45,467 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 804 transitions. Word has length 56 [2020-11-30 00:14:45,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:45,468 INFO L481 AbstractCegarLoop]: Abstraction has 506 states and 804 transitions. [2020-11-30 00:14:45,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:45,468 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 804 transitions. [2020-11-30 00:14:45,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-30 00:14:45,470 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:45,470 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:45,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-30 00:14:45,470 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:45,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:45,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1188180310, now seen corresponding path program 1 times [2020-11-30 00:14:45,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:45,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181314808] [2020-11-30 00:14:45,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 00:14:45,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181314808] [2020-11-30 00:14:45,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:45,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:45,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749787488] [2020-11-30 00:14:45,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:45,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:45,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:45,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:45,546 INFO L87 Difference]: Start difference. First operand 506 states and 804 transitions. Second operand 3 states. [2020-11-30 00:14:45,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:45,834 INFO L93 Difference]: Finished difference Result 1022 states and 1626 transitions. [2020-11-30 00:14:45,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:45,835 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-11-30 00:14:45,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:45,839 INFO L225 Difference]: With dead ends: 1022 [2020-11-30 00:14:45,841 INFO L226 Difference]: Without dead ends: 524 [2020-11-30 00:14:45,842 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 [2020-11-30 00:14:45,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-11-30 00:14:45,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 506. [2020-11-30 00:14:45,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-11-30 00:14:45,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 801 transitions. [2020-11-30 00:14:45,868 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 801 transitions. Word has length 57 [2020-11-30 00:14:45,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:45,869 INFO L481 AbstractCegarLoop]: Abstraction has 506 states and 801 transitions. [2020-11-30 00:14:45,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:45,869 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 801 transitions. [2020-11-30 00:14:45,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-30 00:14:45,871 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:45,871 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:45,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-30 00:14:45,871 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:45,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:45,872 INFO L82 PathProgramCache]: Analyzing trace with hash -2067348000, now seen corresponding path program 1 times [2020-11-30 00:14:45,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:45,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216347953] [2020-11-30 00:14:45,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:45,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 00:14:45,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216347953] [2020-11-30 00:14:45,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:45,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:45,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951900510] [2020-11-30 00:14:45,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:45,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:45,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:45,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:45,940 INFO L87 Difference]: Start difference. First operand 506 states and 801 transitions. Second operand 3 states. [2020-11-30 00:14:46,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:46,210 INFO L93 Difference]: Finished difference Result 1069 states and 1697 transitions. [2020-11-30 00:14:46,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:46,211 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-11-30 00:14:46,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:46,215 INFO L225 Difference]: With dead ends: 1069 [2020-11-30 00:14:46,215 INFO L226 Difference]: Without dead ends: 571 [2020-11-30 00:14:46,217 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 [2020-11-30 00:14:46,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-11-30 00:14:46,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 569. [2020-11-30 00:14:46,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2020-11-30 00:14:46,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 898 transitions. [2020-11-30 00:14:46,246 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 898 transitions. Word has length 57 [2020-11-30 00:14:46,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:46,248 INFO L481 AbstractCegarLoop]: Abstraction has 569 states and 898 transitions. [2020-11-30 00:14:46,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:46,248 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 898 transitions. [2020-11-30 00:14:46,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-30 00:14:46,250 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:46,250 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:46,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-30 00:14:46,251 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:46,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:46,251 INFO L82 PathProgramCache]: Analyzing trace with hash -583256949, now seen corresponding path program 1 times [2020-11-30 00:14:46,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:46,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343276224] [2020-11-30 00:14:46,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:46,323 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:14:46,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343276224] [2020-11-30 00:14:46,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:46,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:46,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197760030] [2020-11-30 00:14:46,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:46,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:46,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:46,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:46,326 INFO L87 Difference]: Start difference. First operand 569 states and 898 transitions. Second operand 3 states. [2020-11-30 00:14:46,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:46,591 INFO L93 Difference]: Finished difference Result 1179 states and 1859 transitions. [2020-11-30 00:14:46,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:46,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-11-30 00:14:46,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:46,595 INFO L225 Difference]: With dead ends: 1179 [2020-11-30 00:14:46,596 INFO L226 Difference]: Without dead ends: 618 [2020-11-30 00:14:46,598 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 [2020-11-30 00:14:46,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-11-30 00:14:46,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 612. [2020-11-30 00:14:46,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2020-11-30 00:14:46,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 962 transitions. [2020-11-30 00:14:46,640 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 962 transitions. Word has length 79 [2020-11-30 00:14:46,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:46,640 INFO L481 AbstractCegarLoop]: Abstraction has 612 states and 962 transitions. [2020-11-30 00:14:46,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:46,640 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 962 transitions. [2020-11-30 00:14:46,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-11-30 00:14:46,642 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:46,642 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:46,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-30 00:14:46,642 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:46,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:46,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1357251849, now seen corresponding path program 1 times [2020-11-30 00:14:46,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:46,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121844745] [2020-11-30 00:14:46,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:14:46,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121844745] [2020-11-30 00:14:46,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:46,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:46,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019265128] [2020-11-30 00:14:46,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:46,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:46,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:46,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:46,701 INFO L87 Difference]: Start difference. First operand 612 states and 962 transitions. Second operand 3 states. [2020-11-30 00:14:46,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:46,998 INFO L93 Difference]: Finished difference Result 1222 states and 1920 transitions. [2020-11-30 00:14:46,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:46,999 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-11-30 00:14:46,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:47,003 INFO L225 Difference]: With dead ends: 1222 [2020-11-30 00:14:47,003 INFO L226 Difference]: Without dead ends: 618 [2020-11-30 00:14:47,007 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 [2020-11-30 00:14:47,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-11-30 00:14:47,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 612. [2020-11-30 00:14:47,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2020-11-30 00:14:47,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 959 transitions. [2020-11-30 00:14:47,039 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 959 transitions. Word has length 80 [2020-11-30 00:14:47,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:47,039 INFO L481 AbstractCegarLoop]: Abstraction has 612 states and 959 transitions. [2020-11-30 00:14:47,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:47,039 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 959 transitions. [2020-11-30 00:14:47,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-30 00:14:47,044 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:47,044 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:47,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-30 00:14:47,044 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:47,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:47,045 INFO L82 PathProgramCache]: Analyzing trace with hash 2054627548, now seen corresponding path program 1 times [2020-11-30 00:14:47,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:47,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374158814] [2020-11-30 00:14:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-30 00:14:47,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374158814] [2020-11-30 00:14:47,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:47,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:47,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541096923] [2020-11-30 00:14:47,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:47,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:47,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:47,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:47,099 INFO L87 Difference]: Start difference. First operand 612 states and 959 transitions. Second operand 3 states. [2020-11-30 00:14:47,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:47,375 INFO L93 Difference]: Finished difference Result 1218 states and 1908 transitions. [2020-11-30 00:14:47,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:47,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2020-11-30 00:14:47,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:47,380 INFO L225 Difference]: With dead ends: 1218 [2020-11-30 00:14:47,381 INFO L226 Difference]: Without dead ends: 614 [2020-11-30 00:14:47,382 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 [2020-11-30 00:14:47,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2020-11-30 00:14:47,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 612. [2020-11-30 00:14:47,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2020-11-30 00:14:47,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 954 transitions. [2020-11-30 00:14:47,412 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 954 transitions. Word has length 85 [2020-11-30 00:14:47,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:47,413 INFO L481 AbstractCegarLoop]: Abstraction has 612 states and 954 transitions. [2020-11-30 00:14:47,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:47,413 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 954 transitions. [2020-11-30 00:14:47,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-11-30 00:14:47,415 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:47,415 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:47,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-30 00:14:47,416 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:47,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:47,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1047765588, now seen corresponding path program 1 times [2020-11-30 00:14:47,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:47,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296446564] [2020-11-30 00:14:47,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:47,463 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-30 00:14:47,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296446564] [2020-11-30 00:14:47,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:47,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:47,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812834817] [2020-11-30 00:14:47,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:47,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:47,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:47,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:47,467 INFO L87 Difference]: Start difference. First operand 612 states and 954 transitions. Second operand 3 states. [2020-11-30 00:14:47,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:47,752 INFO L93 Difference]: Finished difference Result 1276 states and 1991 transitions. [2020-11-30 00:14:47,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:47,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-11-30 00:14:47,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:47,758 INFO L225 Difference]: With dead ends: 1276 [2020-11-30 00:14:47,758 INFO L226 Difference]: Without dead ends: 672 [2020-11-30 00:14:47,760 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 [2020-11-30 00:14:47,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2020-11-30 00:14:47,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 644. [2020-11-30 00:14:47,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2020-11-30 00:14:47,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 997 transitions. [2020-11-30 00:14:47,792 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 997 transitions. Word has length 93 [2020-11-30 00:14:47,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:47,793 INFO L481 AbstractCegarLoop]: Abstraction has 644 states and 997 transitions. [2020-11-30 00:14:47,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:47,793 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 997 transitions. [2020-11-30 00:14:47,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-11-30 00:14:47,795 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:47,795 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:47,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-30 00:14:47,796 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:47,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:47,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1111400187, now seen corresponding path program 1 times [2020-11-30 00:14:47,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:47,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21936253] [2020-11-30 00:14:47,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-30 00:14:47,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21936253] [2020-11-30 00:14:47,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:47,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:47,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768259831] [2020-11-30 00:14:47,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:47,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:47,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:47,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:47,853 INFO L87 Difference]: Start difference. First operand 644 states and 997 transitions. Second operand 3 states. [2020-11-30 00:14:48,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:48,141 INFO L93 Difference]: Finished difference Result 1308 states and 2028 transitions. [2020-11-30 00:14:48,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:48,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-11-30 00:14:48,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:48,146 INFO L225 Difference]: With dead ends: 1308 [2020-11-30 00:14:48,146 INFO L226 Difference]: Without dead ends: 672 [2020-11-30 00:14:48,148 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 [2020-11-30 00:14:48,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2020-11-30 00:14:48,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 644. [2020-11-30 00:14:48,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2020-11-30 00:14:48,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 991 transitions. [2020-11-30 00:14:48,187 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 991 transitions. Word has length 94 [2020-11-30 00:14:48,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:48,188 INFO L481 AbstractCegarLoop]: Abstraction has 644 states and 991 transitions. [2020-11-30 00:14:48,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:48,188 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 991 transitions. [2020-11-30 00:14:48,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-11-30 00:14:48,191 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:48,191 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:48,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-30 00:14:48,191 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:48,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:48,192 INFO L82 PathProgramCache]: Analyzing trace with hash -51700436, now seen corresponding path program 1 times [2020-11-30 00:14:48,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:48,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641767338] [2020-11-30 00:14:48,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-30 00:14:48,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641767338] [2020-11-30 00:14:48,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:48,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:48,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531221522] [2020-11-30 00:14:48,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:48,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:48,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:48,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:48,259 INFO L87 Difference]: Start difference. First operand 644 states and 991 transitions. Second operand 3 states. [2020-11-30 00:14:48,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:48,552 INFO L93 Difference]: Finished difference Result 1344 states and 2068 transitions. [2020-11-30 00:14:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:48,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-11-30 00:14:48,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:48,558 INFO L225 Difference]: With dead ends: 1344 [2020-11-30 00:14:48,558 INFO L226 Difference]: Without dead ends: 708 [2020-11-30 00:14:48,560 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 [2020-11-30 00:14:48,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2020-11-30 00:14:48,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 696. [2020-11-30 00:14:48,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2020-11-30 00:14:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1067 transitions. [2020-11-30 00:14:48,597 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1067 transitions. Word has length 100 [2020-11-30 00:14:48,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:48,597 INFO L481 AbstractCegarLoop]: Abstraction has 696 states and 1067 transitions. [2020-11-30 00:14:48,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:48,598 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1067 transitions. [2020-11-30 00:14:48,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-30 00:14:48,600 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:48,600 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:48,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-30 00:14:48,601 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:48,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:48,601 INFO L82 PathProgramCache]: Analyzing trace with hash -530812530, now seen corresponding path program 1 times [2020-11-30 00:14:48,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:48,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229093054] [2020-11-30 00:14:48,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-30 00:14:48,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229093054] [2020-11-30 00:14:48,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:48,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:48,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463895595] [2020-11-30 00:14:48,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:48,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:48,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:48,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:48,661 INFO L87 Difference]: Start difference. First operand 696 states and 1067 transitions. Second operand 3 states. [2020-11-30 00:14:48,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:48,986 INFO L93 Difference]: Finished difference Result 1401 states and 2150 transitions. [2020-11-30 00:14:48,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:48,987 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2020-11-30 00:14:48,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:48,992 INFO L225 Difference]: With dead ends: 1401 [2020-11-30 00:14:48,993 INFO L226 Difference]: Without dead ends: 709 [2020-11-30 00:14:48,995 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 [2020-11-30 00:14:48,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2020-11-30 00:14:49,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 697. [2020-11-30 00:14:49,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-11-30 00:14:49,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1068 transitions. [2020-11-30 00:14:49,027 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1068 transitions. Word has length 101 [2020-11-30 00:14:49,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:49,027 INFO L481 AbstractCegarLoop]: Abstraction has 697 states and 1068 transitions. [2020-11-30 00:14:49,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:49,028 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1068 transitions. [2020-11-30 00:14:49,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-11-30 00:14:49,030 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:49,030 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:49,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-30 00:14:49,031 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:49,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1306174224, now seen corresponding path program 1 times [2020-11-30 00:14:49,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:49,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333516268] [2020-11-30 00:14:49,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-11-30 00:14:49,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333516268] [2020-11-30 00:14:49,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:49,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:49,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717804881] [2020-11-30 00:14:49,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:49,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:49,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:49,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:49,084 INFO L87 Difference]: Start difference. First operand 697 states and 1068 transitions. Second operand 3 states. [2020-11-30 00:14:49,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:49,392 INFO L93 Difference]: Finished difference Result 1433 states and 2192 transitions. [2020-11-30 00:14:49,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:49,393 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-11-30 00:14:49,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:49,398 INFO L225 Difference]: With dead ends: 1433 [2020-11-30 00:14:49,398 INFO L226 Difference]: Without dead ends: 744 [2020-11-30 00:14:49,400 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 [2020-11-30 00:14:49,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-11-30 00:14:49,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 738. [2020-11-30 00:14:49,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2020-11-30 00:14:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1123 transitions. [2020-11-30 00:14:49,436 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1123 transitions. Word has length 112 [2020-11-30 00:14:49,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:49,436 INFO L481 AbstractCegarLoop]: Abstraction has 738 states and 1123 transitions. [2020-11-30 00:14:49,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:49,436 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1123 transitions. [2020-11-30 00:14:49,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-11-30 00:14:49,438 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:49,439 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:49,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-30 00:14:49,439 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:49,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:49,440 INFO L82 PathProgramCache]: Analyzing trace with hash -142977294, now seen corresponding path program 1 times [2020-11-30 00:14:49,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:49,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180055251] [2020-11-30 00:14:49,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-11-30 00:14:49,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180055251] [2020-11-30 00:14:49,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:49,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:49,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388670184] [2020-11-30 00:14:49,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:49,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:49,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:49,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:49,500 INFO L87 Difference]: Start difference. First operand 738 states and 1123 transitions. Second operand 3 states. [2020-11-30 00:14:49,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:49,820 INFO L93 Difference]: Finished difference Result 1474 states and 2242 transitions. [2020-11-30 00:14:49,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:49,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-11-30 00:14:49,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:49,826 INFO L225 Difference]: With dead ends: 1474 [2020-11-30 00:14:49,826 INFO L226 Difference]: Without dead ends: 744 [2020-11-30 00:14:49,827 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 [2020-11-30 00:14:49,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-11-30 00:14:49,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 738. [2020-11-30 00:14:49,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2020-11-30 00:14:49,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1118 transitions. [2020-11-30 00:14:49,864 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1118 transitions. Word has length 113 [2020-11-30 00:14:49,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:49,864 INFO L481 AbstractCegarLoop]: Abstraction has 738 states and 1118 transitions. [2020-11-30 00:14:49,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:49,864 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1118 transitions. [2020-11-30 00:14:49,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-30 00:14:49,866 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:49,867 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:49,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-30 00:14:49,867 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:49,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:49,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1809562376, now seen corresponding path program 1 times [2020-11-30 00:14:49,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:49,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855528439] [2020-11-30 00:14:49,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-11-30 00:14:49,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855528439] [2020-11-30 00:14:49,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:49,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:49,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663319966] [2020-11-30 00:14:49,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:49,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:49,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:49,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:49,931 INFO L87 Difference]: Start difference. First operand 738 states and 1118 transitions. Second operand 3 states. [2020-11-30 00:14:50,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:50,190 INFO L93 Difference]: Finished difference Result 1510 states and 2285 transitions. [2020-11-30 00:14:50,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:50,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2020-11-30 00:14:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:50,196 INFO L225 Difference]: With dead ends: 1510 [2020-11-30 00:14:50,196 INFO L226 Difference]: Without dead ends: 780 [2020-11-30 00:14:50,198 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 [2020-11-30 00:14:50,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2020-11-30 00:14:50,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 770. [2020-11-30 00:14:50,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2020-11-30 00:14:50,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1156 transitions. [2020-11-30 00:14:50,238 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1156 transitions. Word has length 115 [2020-11-30 00:14:50,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:50,238 INFO L481 AbstractCegarLoop]: Abstraction has 770 states and 1156 transitions. [2020-11-30 00:14:50,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:50,238 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1156 transitions. [2020-11-30 00:14:50,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-30 00:14:50,241 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:50,241 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:50,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-30 00:14:50,241 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:50,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:50,242 INFO L82 PathProgramCache]: Analyzing trace with hash 172042817, now seen corresponding path program 1 times [2020-11-30 00:14:50,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:50,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107679814] [2020-11-30 00:14:50,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:50,300 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-11-30 00:14:50,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107679814] [2020-11-30 00:14:50,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:50,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:50,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855278293] [2020-11-30 00:14:50,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:50,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:50,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:50,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:50,306 INFO L87 Difference]: Start difference. First operand 770 states and 1156 transitions. Second operand 3 states. [2020-11-30 00:14:50,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:50,588 INFO L93 Difference]: Finished difference Result 1542 states and 2314 transitions. [2020-11-30 00:14:50,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:50,589 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2020-11-30 00:14:50,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:50,594 INFO L225 Difference]: With dead ends: 1542 [2020-11-30 00:14:50,594 INFO L226 Difference]: Without dead ends: 780 [2020-11-30 00:14:50,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:50,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2020-11-30 00:14:50,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 770. [2020-11-30 00:14:50,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2020-11-30 00:14:50,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1147 transitions. [2020-11-30 00:14:50,636 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1147 transitions. Word has length 116 [2020-11-30 00:14:50,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:50,637 INFO L481 AbstractCegarLoop]: Abstraction has 770 states and 1147 transitions. [2020-11-30 00:14:50,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:50,637 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1147 transitions. [2020-11-30 00:14:50,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-11-30 00:14:50,640 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:50,640 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:50,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-30 00:14:50,641 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:50,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:50,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1961382768, now seen corresponding path program 1 times [2020-11-30 00:14:50,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:50,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895862546] [2020-11-30 00:14:50,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-11-30 00:14:50,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895862546] [2020-11-30 00:14:50,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:50,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:50,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453390037] [2020-11-30 00:14:50,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:50,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:50,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:50,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:50,692 INFO L87 Difference]: Start difference. First operand 770 states and 1147 transitions. Second operand 3 states. [2020-11-30 00:14:50,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:50,937 INFO L93 Difference]: Finished difference Result 1568 states and 2335 transitions. [2020-11-30 00:14:50,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:50,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2020-11-30 00:14:50,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:50,943 INFO L225 Difference]: With dead ends: 1568 [2020-11-30 00:14:50,944 INFO L226 Difference]: Without dead ends: 806 [2020-11-30 00:14:50,945 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 [2020-11-30 00:14:50,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2020-11-30 00:14:50,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 798. [2020-11-30 00:14:50,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 798 states. [2020-11-30 00:14:50,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1178 transitions. [2020-11-30 00:14:50,988 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1178 transitions. Word has length 137 [2020-11-30 00:14:50,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:50,989 INFO L481 AbstractCegarLoop]: Abstraction has 798 states and 1178 transitions. [2020-11-30 00:14:50,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:50,989 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1178 transitions. [2020-11-30 00:14:50,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-11-30 00:14:50,992 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:50,992 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:50,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-30 00:14:50,993 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:50,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:50,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1483046825, now seen corresponding path program 1 times [2020-11-30 00:14:50,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:50,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276225581] [2020-11-30 00:14:50,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-11-30 00:14:51,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276225581] [2020-11-30 00:14:51,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:51,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:51,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873147852] [2020-11-30 00:14:51,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:51,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:51,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:51,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:51,052 INFO L87 Difference]: Start difference. First operand 798 states and 1178 transitions. Second operand 3 states. [2020-11-30 00:14:51,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:51,372 INFO L93 Difference]: Finished difference Result 1596 states and 2356 transitions. [2020-11-30 00:14:51,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:51,372 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-11-30 00:14:51,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:51,378 INFO L225 Difference]: With dead ends: 1596 [2020-11-30 00:14:51,378 INFO L226 Difference]: Without dead ends: 806 [2020-11-30 00:14:51,380 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 [2020-11-30 00:14:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2020-11-30 00:14:51,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 798. [2020-11-30 00:14:51,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 798 states. [2020-11-30 00:14:51,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1168 transitions. [2020-11-30 00:14:51,430 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1168 transitions. Word has length 138 [2020-11-30 00:14:51,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:51,430 INFO L481 AbstractCegarLoop]: Abstraction has 798 states and 1168 transitions. [2020-11-30 00:14:51,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:51,430 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1168 transitions. [2020-11-30 00:14:51,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-30 00:14:51,433 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:51,434 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:51,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-30 00:14:51,434 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:51,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:51,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1313212300, now seen corresponding path program 1 times [2020-11-30 00:14:51,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:51,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737468264] [2020-11-30 00:14:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-11-30 00:14:51,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737468264] [2020-11-30 00:14:51,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:51,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:51,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31923736] [2020-11-30 00:14:51,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:51,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:51,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:51,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:51,505 INFO L87 Difference]: Start difference. First operand 798 states and 1168 transitions. Second operand 3 states. [2020-11-30 00:14:51,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:51,761 INFO L93 Difference]: Finished difference Result 1651 states and 2410 transitions. [2020-11-30 00:14:51,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:51,762 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 141 [2020-11-30 00:14:51,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:51,767 INFO L225 Difference]: With dead ends: 1651 [2020-11-30 00:14:51,767 INFO L226 Difference]: Without dead ends: 861 [2020-11-30 00:14:51,769 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 [2020-11-30 00:14:51,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2020-11-30 00:14:51,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 847. [2020-11-30 00:14:51,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 847 states. [2020-11-30 00:14:51,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1229 transitions. [2020-11-30 00:14:51,806 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1229 transitions. Word has length 141 [2020-11-30 00:14:51,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:51,807 INFO L481 AbstractCegarLoop]: Abstraction has 847 states and 1229 transitions. [2020-11-30 00:14:51,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:51,807 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1229 transitions. [2020-11-30 00:14:51,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-11-30 00:14:51,810 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:51,810 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:51,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-30 00:14:51,810 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:51,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:51,811 INFO L82 PathProgramCache]: Analyzing trace with hash 75909554, now seen corresponding path program 1 times [2020-11-30 00:14:51,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:51,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370269345] [2020-11-30 00:14:51,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:51,872 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-11-30 00:14:51,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370269345] [2020-11-30 00:14:51,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:51,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:51,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663036554] [2020-11-30 00:14:51,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:51,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:51,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:51,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:51,874 INFO L87 Difference]: Start difference. First operand 847 states and 1229 transitions. Second operand 3 states. [2020-11-30 00:14:52,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:52,171 INFO L93 Difference]: Finished difference Result 1700 states and 2468 transitions. [2020-11-30 00:14:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:52,171 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2020-11-30 00:14:52,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:52,176 INFO L225 Difference]: With dead ends: 1700 [2020-11-30 00:14:52,176 INFO L226 Difference]: Without dead ends: 845 [2020-11-30 00:14:52,178 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 [2020-11-30 00:14:52,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2020-11-30 00:14:52,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 831. [2020-11-30 00:14:52,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2020-11-30 00:14:52,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1206 transitions. [2020-11-30 00:14:52,218 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1206 transitions. Word has length 142 [2020-11-30 00:14:52,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:52,218 INFO L481 AbstractCegarLoop]: Abstraction has 831 states and 1206 transitions. [2020-11-30 00:14:52,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:52,219 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1206 transitions. [2020-11-30 00:14:52,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-30 00:14:52,221 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:52,221 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:52,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-30 00:14:52,222 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:52,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:52,222 INFO L82 PathProgramCache]: Analyzing trace with hash -2072592764, now seen corresponding path program 1 times [2020-11-30 00:14:52,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:52,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273930810] [2020-11-30 00:14:52,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-11-30 00:14:52,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273930810] [2020-11-30 00:14:52,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:52,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:52,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559487306] [2020-11-30 00:14:52,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:52,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:52,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:52,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:52,281 INFO L87 Difference]: Start difference. First operand 831 states and 1206 transitions. Second operand 3 states. [2020-11-30 00:14:52,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:52,534 INFO L93 Difference]: Finished difference Result 1666 states and 2418 transitions. [2020-11-30 00:14:52,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:52,535 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 146 [2020-11-30 00:14:52,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:52,540 INFO L225 Difference]: With dead ends: 1666 [2020-11-30 00:14:52,540 INFO L226 Difference]: Without dead ends: 843 [2020-11-30 00:14:52,543 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 [2020-11-30 00:14:52,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-11-30 00:14:52,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 831. [2020-11-30 00:14:52,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2020-11-30 00:14:52,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1199 transitions. [2020-11-30 00:14:52,578 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1199 transitions. Word has length 146 [2020-11-30 00:14:52,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:52,579 INFO L481 AbstractCegarLoop]: Abstraction has 831 states and 1199 transitions. [2020-11-30 00:14:52,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:52,579 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1199 transitions. [2020-11-30 00:14:52,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-11-30 00:14:52,581 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:52,581 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:52,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-30 00:14:52,582 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:52,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:52,582 INFO L82 PathProgramCache]: Analyzing trace with hash 369501830, now seen corresponding path program 1 times [2020-11-30 00:14:52,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:52,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550494549] [2020-11-30 00:14:52,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-11-30 00:14:52,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550494549] [2020-11-30 00:14:52,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:52,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:52,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797963324] [2020-11-30 00:14:52,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:52,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:52,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:52,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:52,644 INFO L87 Difference]: Start difference. First operand 831 states and 1199 transitions. Second operand 3 states. [2020-11-30 00:14:52,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:52,883 INFO L93 Difference]: Finished difference Result 1666 states and 2404 transitions. [2020-11-30 00:14:52,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:52,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 147 [2020-11-30 00:14:52,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:52,888 INFO L225 Difference]: With dead ends: 1666 [2020-11-30 00:14:52,888 INFO L226 Difference]: Without dead ends: 826 [2020-11-30 00:14:52,890 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 [2020-11-30 00:14:52,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2020-11-30 00:14:52,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 814. [2020-11-30 00:14:52,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2020-11-30 00:14:52,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1170 transitions. [2020-11-30 00:14:52,929 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1170 transitions. Word has length 147 [2020-11-30 00:14:52,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:52,929 INFO L481 AbstractCegarLoop]: Abstraction has 814 states and 1170 transitions. [2020-11-30 00:14:52,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:52,929 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1170 transitions. [2020-11-30 00:14:52,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-11-30 00:14:52,933 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:52,934 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:52,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-30 00:14:52,934 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:52,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:52,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1770310156, now seen corresponding path program 1 times [2020-11-30 00:14:52,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:52,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23610397] [2020-11-30 00:14:52,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-11-30 00:14:52,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23610397] [2020-11-30 00:14:52,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:52,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:52,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674825232] [2020-11-30 00:14:52,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:52,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:52,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:52,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:52,996 INFO L87 Difference]: Start difference. First operand 814 states and 1170 transitions. Second operand 3 states. [2020-11-30 00:14:53,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:53,070 INFO L93 Difference]: Finished difference Result 2412 states and 3460 transitions. [2020-11-30 00:14:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:53,071 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2020-11-30 00:14:53,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:53,080 INFO L225 Difference]: With dead ends: 2412 [2020-11-30 00:14:53,080 INFO L226 Difference]: Without dead ends: 1606 [2020-11-30 00:14:53,082 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 [2020-11-30 00:14:53,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2020-11-30 00:14:53,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 816. [2020-11-30 00:14:53,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 816 states. [2020-11-30 00:14:53,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1172 transitions. [2020-11-30 00:14:53,130 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1172 transitions. Word has length 154 [2020-11-30 00:14:53,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:53,130 INFO L481 AbstractCegarLoop]: Abstraction has 816 states and 1172 transitions. [2020-11-30 00:14:53,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:53,130 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1172 transitions. [2020-11-30 00:14:53,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-11-30 00:14:53,132 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:53,132 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:53,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-30 00:14:53,133 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:53,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:53,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1570716982, now seen corresponding path program 1 times [2020-11-30 00:14:53,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:53,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533510074] [2020-11-30 00:14:53,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-11-30 00:14:53,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533510074] [2020-11-30 00:14:53,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:53,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:53,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599402628] [2020-11-30 00:14:53,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:53,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:53,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:53,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:53,207 INFO L87 Difference]: Start difference. First operand 816 states and 1172 transitions. Second operand 3 states. [2020-11-30 00:14:53,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:53,305 INFO L93 Difference]: Finished difference Result 2411 states and 3456 transitions. [2020-11-30 00:14:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:53,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2020-11-30 00:14:53,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:53,315 INFO L225 Difference]: With dead ends: 2411 [2020-11-30 00:14:53,315 INFO L226 Difference]: Without dead ends: 1603 [2020-11-30 00:14:53,316 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 [2020-11-30 00:14:53,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2020-11-30 00:14:53,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1601. [2020-11-30 00:14:53,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1601 states. [2020-11-30 00:14:53,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 2292 transitions. [2020-11-30 00:14:53,398 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 2292 transitions. Word has length 154 [2020-11-30 00:14:53,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:53,398 INFO L481 AbstractCegarLoop]: Abstraction has 1601 states and 2292 transitions. [2020-11-30 00:14:53,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:53,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 2292 transitions. [2020-11-30 00:14:53,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-11-30 00:14:53,401 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:53,402 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:53,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-30 00:14:53,402 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:53,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:53,403 INFO L82 PathProgramCache]: Analyzing trace with hash -362729202, now seen corresponding path program 1 times [2020-11-30 00:14:53,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:53,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632815618] [2020-11-30 00:14:53,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-11-30 00:14:53,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632815618] [2020-11-30 00:14:53,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:53,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:53,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888540231] [2020-11-30 00:14:53,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:53,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:53,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:53,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:53,524 INFO L87 Difference]: Start difference. First operand 1601 states and 2292 transitions. Second operand 3 states. [2020-11-30 00:14:53,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:53,742 INFO L93 Difference]: Finished difference Result 4747 states and 6780 transitions. [2020-11-30 00:14:53,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:53,743 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 156 [2020-11-30 00:14:53,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:53,763 INFO L225 Difference]: With dead ends: 4747 [2020-11-30 00:14:53,764 INFO L226 Difference]: Without dead ends: 3154 [2020-11-30 00:14:53,769 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 [2020-11-30 00:14:53,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2020-11-30 00:14:53,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 1601. [2020-11-30 00:14:53,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1601 states. [2020-11-30 00:14:53,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 2288 transitions. [2020-11-30 00:14:53,901 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 2288 transitions. Word has length 156 [2020-11-30 00:14:53,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:53,902 INFO L481 AbstractCegarLoop]: Abstraction has 1601 states and 2288 transitions. [2020-11-30 00:14:53,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:53,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 2288 transitions. [2020-11-30 00:14:53,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-11-30 00:14:53,905 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:53,906 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:53,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-30 00:14:53,906 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:53,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:53,907 INFO L82 PathProgramCache]: Analyzing trace with hash -957693967, now seen corresponding path program 1 times [2020-11-30 00:14:53,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:53,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41157382] [2020-11-30 00:14:53,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:14:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-30 00:14:54,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41157382] [2020-11-30 00:14:54,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:14:54,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:14:54,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415519864] [2020-11-30 00:14:54,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:14:54,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:14:54,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:14:54,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:14:54,028 INFO L87 Difference]: Start difference. First operand 1601 states and 2288 transitions. Second operand 3 states. [2020-11-30 00:14:54,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:14:54,398 INFO L93 Difference]: Finished difference Result 4783 states and 6836 transitions. [2020-11-30 00:14:54,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:14:54,399 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 157 [2020-11-30 00:14:54,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:14:54,431 INFO L225 Difference]: With dead ends: 4783 [2020-11-30 00:14:54,439 INFO L226 Difference]: Without dead ends: 3190 [2020-11-30 00:14:54,443 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 [2020-11-30 00:14:54,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2020-11-30 00:14:54,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 3188. [2020-11-30 00:14:54,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3188 states. [2020-11-30 00:14:54,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 4472 transitions. [2020-11-30 00:14:54,672 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 4472 transitions. Word has length 157 [2020-11-30 00:14:54,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:14:54,673 INFO L481 AbstractCegarLoop]: Abstraction has 3188 states and 4472 transitions. [2020-11-30 00:14:54,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:14:54,673 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 4472 transitions. [2020-11-30 00:14:54,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-11-30 00:14:54,677 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:14:54,677 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:14:54,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-30 00:14:54,678 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:14:54,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:14:54,678 INFO L82 PathProgramCache]: Analyzing trace with hash -3753809, now seen corresponding path program 1 times [2020-11-30 00:14:54,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:14:54,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525627776] [2020-11-30 00:14:54,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:14:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:14:54,731 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:14:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:14:54,782 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:14:54,901 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:14:54,902 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 00:14:54,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-30 00:14:55,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:14:55 BoogieIcfgContainer [2020-11-30 00:14:55,071 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:14:55,072 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:14:55,072 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:14:55,073 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:14:55,073 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:14:40" (3/4) ... [2020-11-30 00:14:55,076 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 00:14:55,259 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_caf02cd2-6eb9-49c3-af2e-936e16a0b136/bin/uautomizer/witness.graphml [2020-11-30 00:14:55,260 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:14:55,262 INFO L168 Benchmark]: Toolchain (without parser) took 16892.93 ms. Allocated memory was 113.2 MB in the beginning and 394.3 MB in the end (delta: 281.0 MB). Free memory was 80.7 MB in the beginning and 137.0 MB in the end (delta: -56.3 MB). Peak memory consumption was 225.5 MB. Max. memory is 16.1 GB. [2020-11-30 00:14:55,263 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 75.5 MB. Free memory was 33.6 MB in the beginning and 33.5 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:14:55,264 INFO L168 Benchmark]: CACSL2BoogieTranslator took 581.03 ms. Allocated memory is still 113.2 MB. Free memory was 80.4 MB in the beginning and 85.3 MB in the end (delta: -4.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 00:14:55,264 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.46 ms. Allocated memory is still 113.2 MB. Free memory was 85.3 MB in the beginning and 82.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-30 00:14:55,265 INFO L168 Benchmark]: Boogie Preprocessor took 64.99 ms. Allocated memory is still 113.2 MB. Free memory was 82.0 MB in the beginning and 79.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:14:55,265 INFO L168 Benchmark]: RCFGBuilder took 1130.54 ms. Allocated memory is still 113.2 MB. Free memory was 79.9 MB in the beginning and 74.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 49.8 MB. Max. memory is 16.1 GB. [2020-11-30 00:14:55,266 INFO L168 Benchmark]: TraceAbstraction took 14845.75 ms. Allocated memory was 113.2 MB in the beginning and 394.3 MB in the end (delta: 281.0 MB). Free memory was 73.4 MB in the beginning and 154.8 MB in the end (delta: -81.5 MB). Peak memory consumption was 199.5 MB. Max. memory is 16.1 GB. [2020-11-30 00:14:55,266 INFO L168 Benchmark]: Witness Printer took 187.45 ms. Allocated memory is still 394.3 MB. Free memory was 154.8 MB in the beginning and 137.0 MB in the end (delta: 17.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-30 00:14:55,269 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 75.5 MB. Free memory was 33.6 MB in the beginning and 33.5 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 581.03 ms. Allocated memory is still 113.2 MB. Free memory was 80.4 MB in the beginning and 85.3 MB in the end (delta: -4.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 71.46 ms. Allocated memory is still 113.2 MB. Free memory was 85.3 MB in the beginning and 82.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 64.99 ms. Allocated memory is still 113.2 MB. Free memory was 82.0 MB in the beginning and 79.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1130.54 ms. Allocated memory is still 113.2 MB. Free memory was 79.9 MB in the beginning and 74.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 49.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14845.75 ms. Allocated memory was 113.2 MB in the beginning and 394.3 MB in the end (delta: 281.0 MB). Free memory was 73.4 MB in the beginning and 154.8 MB in the end (delta: -81.5 MB). Peak memory consumption was 199.5 MB. Max. memory is 16.1 GB. * Witness Printer took 187.45 ms. Allocated memory is still 394.3 MB. Free memory was 154.8 MB in the beginning and 137.0 MB in the end (delta: 17.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L704] int s ; [L705] int tmp ; [L709] s = 8464 [L14] int s__info_callback = __VERIFIER_nondet_int() ; [L15] int s__in_handshake = __VERIFIER_nondet_int() ; [L16] int s__state ; [L17] int s__new_session ; [L18] int s__server ; [L19] int s__version = __VERIFIER_nondet_int() ; [L20] int s__type ; [L21] int s__init_num ; [L22] int s__hit = __VERIFIER_nondet_int() ; [L23] int s__rwstate ; [L24] int s__init_buf___0 = 1; [L25] int s__debug = __VERIFIER_nondet_int() ; [L26] int s__shutdown ; [L27] int s__cert = __VERIFIER_nondet_int() ; [L28] int s__options = __VERIFIER_nondet_int() ; [L29] int s__verify_mode = __VERIFIER_nondet_int() ; [L30] int s__session__peer = __VERIFIER_nondet_int() ; [L31] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L32] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L33] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L34] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L35] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L36] int s__s3__tmp__cert_request ; [L37] int s__s3__tmp__reuse_message ; [L38] int s__s3__tmp__use_rsa_tmp ; [L39] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L40] int s__s3__tmp__new_cipher__algorithms ; [L41] int s__s3__tmp__next_state___0 ; [L42] int s__s3__tmp__new_cipher__algo_strength ; [L43] int s__session__cipher ; [L44] int buf ; [L45] unsigned long l ; [L46] unsigned long Time ; [L47] unsigned long tmp ; [L48] int cb ; [L49] long num1 = __VERIFIER_nondet_long() ; [L50] int ret ; [L51] int new_state ; [L52] int state ; [L53] int skip ; [L54] int got_new_session ; [L55] int tmp___1 = __VERIFIER_nondet_int() ; [L56] int tmp___2 = __VERIFIER_nondet_int() ; [L57] int tmp___3 = __VERIFIER_nondet_int() ; [L58] int tmp___4 = __VERIFIER_nondet_int() ; [L59] int tmp___5 = __VERIFIER_nondet_int() ; [L60] int tmp___6 = __VERIFIER_nondet_int() ; [L61] int tmp___7 ; [L62] long tmp___8 = __VERIFIER_nondet_long() ; [L63] int tmp___9 = __VERIFIER_nondet_int() ; [L64] int tmp___10 = __VERIFIER_nondet_int() ; [L65] int blastFlag ; [L66] int __cil_tmp55 ; [L67] unsigned long __cil_tmp56 ; [L68] unsigned long __cil_tmp57 ; [L69] unsigned long __cil_tmp58 ; [L70] unsigned long __cil_tmp59 ; [L71] int __cil_tmp60 ; [L72] unsigned long __cil_tmp61 = __VERIFIER_nondet_ulong() ; [L76] s__state = initial_state [L77] blastFlag = 0 [L78] tmp = __VERIFIER_nondet_int() [L79] Time = tmp [L80] cb = 0 [L81] ret = -1 [L82] skip = 0 [L83] got_new_session = 0 [L84] COND TRUE s__info_callback != 0 [L85] cb = s__info_callback [L91] s__in_handshake ++ [L92] COND FALSE !(tmp___1 + 12288) [L97] COND FALSE !(s__cert == 0) [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 8192) [L113] COND FALSE !(s__state == 24576) [L116] COND FALSE !(s__state == 8195) [L119] COND FALSE !(s__state == 8480) [L122] COND FALSE !(s__state == 8481) [L125] COND FALSE !(s__state == 8482) [L128] COND TRUE s__state == 8464 [L274] s__shutdown = 0 [L275] ret = __VERIFIER_nondet_int() [L276] COND TRUE blastFlag == 0 [L277] blastFlag = 1 [L279] COND FALSE !(ret <= 0) [L282] got_new_session = 1 [L283] s__state = 8496 [L284] s__init_num = 0 [L653] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L654] COND FALSE !(! s__s3__tmp__reuse_message) [L688] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 8192) [L113] COND FALSE !(s__state == 24576) [L116] COND FALSE !(s__state == 8195) [L119] COND FALSE !(s__state == 8480) [L122] COND FALSE !(s__state == 8481) [L125] COND FALSE !(s__state == 8482) [L128] COND FALSE !(s__state == 8464) [L131] COND FALSE !(s__state == 8465) [L134] COND FALSE !(s__state == 8466) [L137] COND TRUE s__state == 8496 [L288] ret = __VERIFIER_nondet_int() [L289] COND TRUE blastFlag == 1 [L290] blastFlag = 2 [L292] COND FALSE !(ret <= 0) [L295] COND FALSE !(\read(s__hit)) [L298] s__state = 8512 [L300] s__init_num = 0 [L653] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L654] COND FALSE !(! s__s3__tmp__reuse_message) [L688] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 8192) [L113] COND FALSE !(s__state == 24576) [L116] COND FALSE !(s__state == 8195) [L119] COND FALSE !(s__state == 8480) [L122] COND FALSE !(s__state == 8481) [L125] COND FALSE !(s__state == 8482) [L128] COND FALSE !(s__state == 8464) [L131] COND FALSE !(s__state == 8465) [L134] COND FALSE !(s__state == 8466) [L137] COND FALSE !(s__state == 8496) [L140] COND FALSE !(s__state == 8497) [L143] COND TRUE s__state == 8512 [L305] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L306] __cil_tmp56 = (unsigned long )s__s3__tmp__new_cipher__algorithms [L307] COND TRUE __cil_tmp56 + 256UL [L308] __cil_tmp56 = 256345 [L309] skip = 1 [L320] s__state = 8528 [L321] s__init_num = 0 [L653] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L654] COND FALSE !(! s__s3__tmp__reuse_message) [L688] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 8192) [L113] COND FALSE !(s__state == 24576) [L116] COND FALSE !(s__state == 8195) [L119] COND FALSE !(s__state == 8480) [L122] COND FALSE !(s__state == 8481) [L125] COND FALSE !(s__state == 8482) [L128] COND FALSE !(s__state == 8464) [L131] COND FALSE !(s__state == 8465) [L134] COND FALSE !(s__state == 8466) [L137] COND FALSE !(s__state == 8496) [L140] COND FALSE !(s__state == 8497) [L143] COND FALSE !(s__state == 8512) [L146] COND FALSE !(s__state == 8513) [L149] COND TRUE s__state == 8528 [L325] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L326] l = (unsigned long )s__s3__tmp__new_cipher__algorithms [L328] __cil_tmp57 = (unsigned long )s__options [L329] COND TRUE __cil_tmp57 + 2097152UL [L330] s__s3__tmp__use_rsa_tmp = 1 [L335] COND TRUE \read(s__s3__tmp__use_rsa_tmp) [L363] ret = __VERIFIER_nondet_int() [L364] COND FALSE !(blastFlag == 3) [L367] COND FALSE !(ret <= 0) [L384] s__state = 8544 [L385] s__init_num = 0 [L653] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L654] COND FALSE !(! s__s3__tmp__reuse_message) [L688] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 8192) [L113] COND FALSE !(s__state == 24576) [L116] COND FALSE !(s__state == 8195) [L119] COND FALSE !(s__state == 8480) [L122] COND FALSE !(s__state == 8481) [L125] COND FALSE !(s__state == 8482) [L128] COND FALSE !(s__state == 8464) [L131] COND FALSE !(s__state == 8465) [L134] COND FALSE !(s__state == 8466) [L137] COND FALSE !(s__state == 8496) [L140] COND FALSE !(s__state == 8497) [L143] COND FALSE !(s__state == 8512) [L146] COND FALSE !(s__state == 8513) [L149] COND FALSE !(s__state == 8528) [L152] COND FALSE !(s__state == 8529) [L155] COND TRUE s__state == 8544 [L389] COND TRUE s__verify_mode + 1 [L390] COND TRUE s__session__peer != 0 [L391] COND TRUE s__verify_mode + 4 [L392] s__verify_mode = 123 [L393] skip = 1 [L394] s__s3__tmp__cert_request = 0 [L395] s__state = 8560 [L653] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L654] COND FALSE !(! s__s3__tmp__reuse_message) [L688] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 8192) [L113] COND FALSE !(s__state == 24576) [L116] COND FALSE !(s__state == 8195) [L119] COND FALSE !(s__state == 8480) [L122] COND FALSE !(s__state == 8481) [L125] COND FALSE !(s__state == 8482) [L128] COND FALSE !(s__state == 8464) [L131] COND FALSE !(s__state == 8465) [L134] COND FALSE !(s__state == 8466) [L137] COND FALSE !(s__state == 8496) [L140] COND FALSE !(s__state == 8497) [L143] COND FALSE !(s__state == 8512) [L146] COND FALSE !(s__state == 8513) [L149] COND FALSE !(s__state == 8528) [L152] COND FALSE !(s__state == 8529) [L155] COND FALSE !(s__state == 8544) [L158] COND FALSE !(s__state == 8545) [L161] COND TRUE s__state == 8560 [L439] ret = __VERIFIER_nondet_int() [L440] COND FALSE !(ret <= 0) [L443] s__s3__tmp__next_state___0 = 8576 [L444] s__state = 8448 [L445] s__init_num = 0 [L653] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L654] COND TRUE ! s__s3__tmp__reuse_message [L655] COND TRUE ! skip [L656] COND TRUE state == 8560 [L657] COND TRUE s__state == 8448 [L658] COND TRUE s__verify_mode != -1 [L659] COND TRUE s__verify_mode != -2 [L660] COND TRUE __cil_tmp61 != 9021 [L661] COND TRUE __cil_tmp58 != 4294967294 [L662] COND TRUE blastFlag != 4 [L663] COND TRUE tmp___7 != 1024 [L3] __assert_fail("0", "s3_srvr_12.cil.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 168 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.6s, OverallIterations: 35, TraceHistogramMax: 6, AutomataDifference: 9.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7183 SDtfs, 6874 SDslu, 1823 SDs, 0 SdLazy, 2872 SolverSat, 1350 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 104 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3188occurred in iteration=34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 34 MinimizatonAttempts, 2673 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 3216 NumberOfCodeBlocks, 3216 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 3025 ConstructedInterpolants, 0 QuantifiedInterpolants, 576216 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 34 InterpolantComputations, 34 PerfectInterpolantSequences, 2752/2752 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...