/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:25:21,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:25:21,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:25:21,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:25:21,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:25:21,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:25:21,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:25:21,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:25:21,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:25:21,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:25:21,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:25:21,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:25:21,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:25:21,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:25:21,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:25:21,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:25:21,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:25:21,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:25:21,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:25:21,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:25:21,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:25:21,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:25:21,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:25:21,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:25:21,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:25:21,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:25:21,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:25:21,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:25:21,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:25:21,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:25:21,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:25:21,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:25:21,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:25:21,940 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:25:21,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:25:21,942 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:25:21,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:25:21,943 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:25:21,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:25:21,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:25:21,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:25:21,946 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 12:25:21,995 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:25:21,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:25:21,997 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:25:21,997 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:25:21,997 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:25:21,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:25:21,999 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:25:21,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:25:21,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:25:21,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:25:22,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:25:22,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:25:22,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:25:22,001 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:25:22,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:25:22,002 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:25:22,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:25:22,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:25:22,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:25:22,003 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:25:22,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:25:22,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:25:22,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:25:22,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:25:22,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:25:22,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:25:22,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:25:22,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:25:22,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:25:22,005 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:25:22,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:25:22,496 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:25:22,500 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:25:22,502 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:25:22,503 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:25:22,504 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1.cil-1.c [2020-09-21 12:25:22,587 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1636b200c/9eefdefdc7dd46e88e85be2c4dd24138/FLAGff8427677 [2020-09-21 12:25:23,227 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:25:23,228 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_1.cil-1.c [2020-09-21 12:25:23,249 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1636b200c/9eefdefdc7dd46e88e85be2c4dd24138/FLAGff8427677 [2020-09-21 12:25:23,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1636b200c/9eefdefdc7dd46e88e85be2c4dd24138 [2020-09-21 12:25:23,499 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:25:23,506 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:25:23,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:25:23,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:25:23,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:25:23,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:25:23" (1/1) ... [2020-09-21 12:25:23,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c5f9fa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:23, skipping insertion in model container [2020-09-21 12:25:23,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:25:23" (1/1) ... [2020-09-21 12:25:23,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:25:23,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:25:23,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:25:23,883 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:25:24,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:25:24,091 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:25:24,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:24 WrapperNode [2020-09-21 12:25:24,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:25:24,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:25:24,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:25:24,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:25:24,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:24" (1/1) ... [2020-09-21 12:25:24,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:24" (1/1) ... [2020-09-21 12:25:24,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:24" (1/1) ... [2020-09-21 12:25:24,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:24" (1/1) ... [2020-09-21 12:25:24,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:24" (1/1) ... [2020-09-21 12:25:24,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:24" (1/1) ... [2020-09-21 12:25:24,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:24" (1/1) ... [2020-09-21 12:25:24,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:25:24,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:25:24,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:25:24,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:25:24,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/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 [2020-09-21 12:25:24,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:25:24,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:25:24,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-09-21 12:25:24,266 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:25:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:25:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 12:25:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:25:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-09-21 12:25:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-09-21 12:25:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:25:24,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:25:24,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:25:24,559 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-09-21 12:25:25,018 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-09-21 12:25:25,019 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-09-21 12:25:25,033 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:25:25,033 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 12:25:25,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:25:25 BoogieIcfgContainer [2020-09-21 12:25:25,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:25:25,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:25:25,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:25:25,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:25:25,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:25:23" (1/3) ... [2020-09-21 12:25:25,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f71cf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:25:25, skipping insertion in model container [2020-09-21 12:25:25,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:24" (2/3) ... [2020-09-21 12:25:25,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f71cf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:25:25, skipping insertion in model container [2020-09-21 12:25:25,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:25:25" (3/3) ... [2020-09-21 12:25:25,052 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_1.cil-1.c [2020-09-21 12:25:25,065 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:25:25,076 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:25:25,100 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:25:25,132 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:25:25,132 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:25:25,132 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:25:25,133 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:25:25,133 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:25:25,133 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:25:25,133 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:25:25,133 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:25:25,160 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states. [2020-09-21 12:25:25,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-21 12:25:25,173 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:25,174 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, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:25,175 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:25,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:25,182 INFO L82 PathProgramCache]: Analyzing trace with hash 281430660, now seen corresponding path program 1 times [2020-09-21 12:25:25,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:25,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419270552] [2020-09-21 12:25:25,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:25,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:25,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:25,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:26,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:26,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-21 12:25:26,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:26,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-09-21 12:25:26,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:26,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:26,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:25:26,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-21 12:25:26,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:25:26,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:26,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:26,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:26,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:26,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:26,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 12:25:26,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:26,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:26,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:26,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:26,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:26,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419270552] [2020-09-21 12:25:26,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:26,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:26,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380076354] [2020-09-21 12:25:26,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:26,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:26,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:26,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:26,198 INFO L87 Difference]: Start difference. First operand 151 states. Second operand 3 states. [2020-09-21 12:25:26,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:26,337 INFO L93 Difference]: Finished difference Result 420 states and 708 transitions. [2020-09-21 12:25:26,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:26,339 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-09-21 12:25:26,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:26,359 INFO L225 Difference]: With dead ends: 420 [2020-09-21 12:25:26,359 INFO L226 Difference]: Without dead ends: 255 [2020-09-21 12:25:26,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:26,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-09-21 12:25:26,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2020-09-21 12:25:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-09-21 12:25:26,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 385 transitions. [2020-09-21 12:25:26,451 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 385 transitions. Word has length 50 [2020-09-21 12:25:26,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:26,452 INFO L479 AbstractCegarLoop]: Abstraction has 255 states and 385 transitions. [2020-09-21 12:25:26,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:26,452 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 385 transitions. [2020-09-21 12:25:26,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-21 12:25:26,456 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:26,457 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2020-09-21 12:25:26,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:25:26,457 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:26,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:26,458 INFO L82 PathProgramCache]: Analyzing trace with hash 474837897, now seen corresponding path program 1 times [2020-09-21 12:25:26,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:26,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742335194] [2020-09-21 12:25:26,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:26,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:26,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:26,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:26,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:26,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:26,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-21 12:25:26,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:26,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-09-21 12:25:26,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:26,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:26,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-21 12:25:26,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-21 12:25:26,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:26,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:26,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:26,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:26,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:26,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:26,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:26,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:26,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:26,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:26,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:26,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:26,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:26,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742335194] [2020-09-21 12:25:26,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:26,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:26,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150529295] [2020-09-21 12:25:26,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:26,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:26,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:26,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:26,876 INFO L87 Difference]: Start difference. First operand 255 states and 385 transitions. Second operand 3 states. [2020-09-21 12:25:27,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:27,197 INFO L93 Difference]: Finished difference Result 613 states and 954 transitions. [2020-09-21 12:25:27,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:27,200 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-09-21 12:25:27,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:27,206 INFO L225 Difference]: With dead ends: 613 [2020-09-21 12:25:27,207 INFO L226 Difference]: Without dead ends: 347 [2020-09-21 12:25:27,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:27,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-09-21 12:25:27,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 337. [2020-09-21 12:25:27,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-09-21 12:25:27,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 499 transitions. [2020-09-21 12:25:27,264 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 499 transitions. Word has length 66 [2020-09-21 12:25:27,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:27,266 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 499 transitions. [2020-09-21 12:25:27,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:27,266 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 499 transitions. [2020-09-21 12:25:27,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-21 12:25:27,276 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:27,277 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:27,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:25:27,277 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:27,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:27,280 INFO L82 PathProgramCache]: Analyzing trace with hash 5421205, now seen corresponding path program 1 times [2020-09-21 12:25:27,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:27,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083859769] [2020-09-21 12:25:27,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:27,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:27,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:27,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:27,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:27,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-09-21 12:25:27,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:27,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-09-21 12:25:27,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:27,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:27,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-09-21 12:25:27,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-21 12:25:27,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:27,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:27,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:27,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:27,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:27,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:27,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:27,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:27,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:27,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:27,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:27,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-21 12:25:27,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083859769] [2020-09-21 12:25:27,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:27,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:27,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923293736] [2020-09-21 12:25:27,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:27,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:27,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:27,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:27,701 INFO L87 Difference]: Start difference. First operand 337 states and 499 transitions. Second operand 3 states. [2020-09-21 12:25:27,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:27,942 INFO L93 Difference]: Finished difference Result 751 states and 1144 transitions. [2020-09-21 12:25:27,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:27,943 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-09-21 12:25:27,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:27,947 INFO L225 Difference]: With dead ends: 751 [2020-09-21 12:25:27,947 INFO L226 Difference]: Without dead ends: 427 [2020-09-21 12:25:27,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:27,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-09-21 12:25:27,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 419. [2020-09-21 12:25:27,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2020-09-21 12:25:27,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 591 transitions. [2020-09-21 12:25:27,967 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 591 transitions. Word has length 87 [2020-09-21 12:25:27,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:27,967 INFO L479 AbstractCegarLoop]: Abstraction has 419 states and 591 transitions. [2020-09-21 12:25:27,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:27,968 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 591 transitions. [2020-09-21 12:25:27,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-21 12:25:27,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:27,970 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:27,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:25:27,971 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:27,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:27,971 INFO L82 PathProgramCache]: Analyzing trace with hash -891972073, now seen corresponding path program 1 times [2020-09-21 12:25:27,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:27,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858321651] [2020-09-21 12:25:27,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:28,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:28,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:28,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:28,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:28,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-09-21 12:25:28,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:28,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 383 [2020-09-21 12:25:28,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:28,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:28,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-09-21 12:25:28,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 12:25:28,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:28,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:28,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:28,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:28,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:28,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:28,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:25:28,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:28,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:28,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:28,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:28,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-21 12:25:28,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858321651] [2020-09-21 12:25:28,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:28,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:28,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961434085] [2020-09-21 12:25:28,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:28,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:28,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:28,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:28,471 INFO L87 Difference]: Start difference. First operand 419 states and 591 transitions. Second operand 3 states. [2020-09-21 12:25:28,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:28,692 INFO L93 Difference]: Finished difference Result 879 states and 1259 transitions. [2020-09-21 12:25:28,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:28,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-09-21 12:25:28,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:28,699 INFO L225 Difference]: With dead ends: 879 [2020-09-21 12:25:28,699 INFO L226 Difference]: Without dead ends: 473 [2020-09-21 12:25:28,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:28,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2020-09-21 12:25:28,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 465. [2020-09-21 12:25:28,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2020-09-21 12:25:28,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 647 transitions. [2020-09-21 12:25:28,720 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 647 transitions. Word has length 87 [2020-09-21 12:25:28,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:28,720 INFO L479 AbstractCegarLoop]: Abstraction has 465 states and 647 transitions. [2020-09-21 12:25:28,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:28,721 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 647 transitions. [2020-09-21 12:25:28,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-21 12:25:28,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:28,723 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-21 12:25:28,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:25:28,724 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:28,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:28,724 INFO L82 PathProgramCache]: Analyzing trace with hash 182910289, now seen corresponding path program 1 times [2020-09-21 12:25:28,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:28,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963530149] [2020-09-21 12:25:28,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:28,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:28,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:28,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:28,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:29,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:29,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-09-21 12:25:29,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:29,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-09-21 12:25:29,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:29,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:29,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-09-21 12:25:29,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-09-21 12:25:29,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:29,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:29,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:29,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:29,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:29,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:29,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:29,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:29,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:29,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:29,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:29,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:29,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-21 12:25:29,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963530149] [2020-09-21 12:25:29,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:29,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:29,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314052197] [2020-09-21 12:25:29,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:29,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:29,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:29,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:29,169 INFO L87 Difference]: Start difference. First operand 465 states and 647 transitions. Second operand 3 states. [2020-09-21 12:25:29,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:29,230 INFO L93 Difference]: Finished difference Result 917 states and 1282 transitions. [2020-09-21 12:25:29,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:29,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-09-21 12:25:29,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:29,237 INFO L225 Difference]: With dead ends: 917 [2020-09-21 12:25:29,238 INFO L226 Difference]: Without dead ends: 690 [2020-09-21 12:25:29,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:29,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2020-09-21 12:25:29,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 690. [2020-09-21 12:25:29,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2020-09-21 12:25:29,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 960 transitions. [2020-09-21 12:25:29,261 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 960 transitions. Word has length 95 [2020-09-21 12:25:29,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:29,261 INFO L479 AbstractCegarLoop]: Abstraction has 690 states and 960 transitions. [2020-09-21 12:25:29,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:29,262 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 960 transitions. [2020-09-21 12:25:29,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-09-21 12:25:29,264 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:29,265 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:29,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:25:29,265 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:29,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:29,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1525903835, now seen corresponding path program 1 times [2020-09-21 12:25:29,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:29,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945022781] [2020-09-21 12:25:29,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:29,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:29,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:29,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:29,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:29,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-09-21 12:25:29,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:29,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-09-21 12:25:29,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:29,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:29,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-09-21 12:25:29,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-21 12:25:29,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:29,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:29,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:29,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:29,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:29,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:29,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:29,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:29,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:29,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:29,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:29,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-09-21 12:25:29,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945022781] [2020-09-21 12:25:29,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:29,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:29,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388898875] [2020-09-21 12:25:29,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:29,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:29,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:29,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:29,666 INFO L87 Difference]: Start difference. First operand 690 states and 960 transitions. Second operand 3 states. [2020-09-21 12:25:29,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:29,912 INFO L93 Difference]: Finished difference Result 1538 states and 2212 transitions. [2020-09-21 12:25:29,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:29,912 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-09-21 12:25:29,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:29,923 INFO L225 Difference]: With dead ends: 1538 [2020-09-21 12:25:29,924 INFO L226 Difference]: Without dead ends: 825 [2020-09-21 12:25:29,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:29,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2020-09-21 12:25:29,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 765. [2020-09-21 12:25:29,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 765 states. [2020-09-21 12:25:29,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1089 transitions. [2020-09-21 12:25:29,954 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1089 transitions. Word has length 108 [2020-09-21 12:25:29,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:29,954 INFO L479 AbstractCegarLoop]: Abstraction has 765 states and 1089 transitions. [2020-09-21 12:25:29,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:29,955 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1089 transitions. [2020-09-21 12:25:29,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-21 12:25:29,957 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:29,957 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:29,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:25:29,957 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:29,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:29,958 INFO L82 PathProgramCache]: Analyzing trace with hash 298054395, now seen corresponding path program 1 times [2020-09-21 12:25:29,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:29,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742720829] [2020-09-21 12:25:29,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 12:25:29,992 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 12:25:29,992 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 12:25:29,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:25:30,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:25:30 BoogieIcfgContainer [2020-09-21 12:25:30,048 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:25:30,053 INFO L168 Benchmark]: Toolchain (without parser) took 6549.02 ms. Allocated memory was 147.3 MB in the beginning and 282.6 MB in the end (delta: 135.3 MB). Free memory was 103.4 MB in the beginning and 178.1 MB in the end (delta: -74.7 MB). Peak memory consumption was 60.6 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:30,054 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 12:25:30,061 INFO L168 Benchmark]: CACSL2BoogieTranslator took 584.85 ms. Allocated memory was 147.3 MB in the beginning and 205.0 MB in the end (delta: 57.7 MB). Free memory was 102.8 MB in the beginning and 179.9 MB in the end (delta: -77.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:30,063 INFO L168 Benchmark]: Boogie Preprocessor took 79.72 ms. Allocated memory is still 205.0 MB. Free memory was 179.9 MB in the beginning and 177.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:30,063 INFO L168 Benchmark]: RCFGBuilder took 868.63 ms. Allocated memory is still 205.0 MB. Free memory was 177.0 MB in the beginning and 126.8 MB in the end (delta: 50.2 MB). Peak memory consumption was 50.2 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:30,064 INFO L168 Benchmark]: TraceAbstraction took 5005.04 ms. Allocated memory was 205.0 MB in the beginning and 282.6 MB in the end (delta: 77.6 MB). Free memory was 126.1 MB in the beginning and 178.1 MB in the end (delta: -52.1 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:30,075 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 584.85 ms. Allocated memory was 147.3 MB in the beginning and 205.0 MB in the end (delta: 57.7 MB). Free memory was 102.8 MB in the beginning and 179.9 MB in the end (delta: -77.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 79.72 ms. Allocated memory is still 205.0 MB. Free memory was 179.9 MB in the beginning and 177.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 868.63 ms. Allocated memory is still 205.0 MB. Free memory was 177.0 MB in the beginning and 126.8 MB in the end (delta: 50.2 MB). Peak memory consumption was 50.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5005.04 ms. Allocated memory was 205.0 MB in the beginning and 282.6 MB in the end (delta: 77.6 MB). Free memory was 126.1 MB in the beginning and 178.1 MB in the end (delta: -52.1 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 611]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L616] int s ; [L617] int tmp ; [L621] s = 8464 [L622] CALL ssl3_accept(s) [L11] int s__info_callback = __VERIFIER_nondet_int() ; [L12] int s__in_handshake = __VERIFIER_nondet_int() ; [L13] int s__state ; [L14] int s__new_session ; [L15] int s__server ; [L16] int s__version = __VERIFIER_nondet_int() ; [L17] int s__type ; [L18] int s__init_num ; [L19] int s__hit = __VERIFIER_nondet_int() ; [L20] int s__rwstate ; [L21] int s__init_buf___0 = 1; [L22] int s__debug = __VERIFIER_nondet_int() ; [L23] int s__shutdown ; [L24] int s__cert = __VERIFIER_nondet_int() ; [L25] int s__options = __VERIFIER_nondet_int() ; [L26] int s__verify_mode = __VERIFIER_nondet_int() ; [L27] int s__session__peer = __VERIFIER_nondet_int() ; [L28] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L29] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L30] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L31] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L32] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L33] int s__s3__tmp__cert_request ; [L34] int s__s3__tmp__reuse_message = __VERIFIER_nondet_int() ; [L35] int s__s3__tmp__use_rsa_tmp ; [L36] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L37] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() ; [L38] int s__s3__tmp__next_state___0 ; [L39] int s__s3__tmp__new_cipher__algo_strength = __VERIFIER_nondet_int() ; [L40] int s__session__cipher ; [L41] int buf = __VERIFIER_nondet_int() ; [L42] unsigned long l ; [L43] unsigned long Time ; [L44] unsigned long tmp = __VERIFIER_nondet_long() ; [L45] int cb ; [L46] long num1 ; [L47] int ret ; [L48] int new_state ; [L49] int state ; [L50] int skip ; [L51] int got_new_session ; [L52] int tmp___1 = __VERIFIER_nondet_int() ; [L53] int tmp___2 = __VERIFIER_nondet_int() ; [L54] int tmp___3 ; [L55] int tmp___4 ; [L56] int tmp___5 ; [L57] int tmp___6 ; [L58] int tmp___7 ; [L59] long tmp___8 = __VERIFIER_nondet_long() ; [L60] int tmp___9 ; [L61] int tmp___10 ; [L62] int blastFlag ; [L63] int __cil_tmp55 ; [L64] unsigned long __cil_tmp56 ; [L65] unsigned long __cil_tmp57 ; [L66] unsigned long __cil_tmp58 ; [L67] unsigned long __cil_tmp59 ; [L68] int __cil_tmp60 ; [L69] unsigned long __cil_tmp61 ; [L73] s__state = initial_state [L74] blastFlag = 0 [L75] Time = tmp [L76] cb = 0 [L77] ret = -1 [L78] skip = 0 [L79] got_new_session = 0 [L80] COND TRUE s__info_callback != 0 [L81] cb = s__info_callback [L87] s__in_handshake ++ [L88] COND FALSE !(tmp___1 + 12288) [L93] COND FALSE !(s__cert == 0) [L97] COND TRUE 1 [L99] state = s__state [L100] COND FALSE !(s__state == 12292) [L103] COND FALSE !(s__state == 16384) [L106] COND FALSE !(s__state == 8192) [L109] COND FALSE !(s__state == 24576) [L112] COND FALSE !(s__state == 8195) [L115] COND FALSE !(s__state == 8480) [L118] COND FALSE !(s__state == 8481) [L121] COND FALSE !(s__state == 8482) [L124] COND TRUE s__state == 8464 [L268] s__shutdown = 0 [L269] ret = __VERIFIER_nondet_int() [L270] COND TRUE blastFlag == 0 [L271] blastFlag = 1 [L273] COND FALSE !(ret <= 0) [L276] got_new_session = 1 [L277] s__state = 8496 [L278] s__init_num = 0 [L583] COND FALSE !(! s__s3__tmp__reuse_message) [L600] skip = 0 [L97] COND TRUE 1 [L99] state = s__state [L100] COND FALSE !(s__state == 12292) [L103] COND FALSE !(s__state == 16384) [L106] COND FALSE !(s__state == 8192) [L109] COND FALSE !(s__state == 24576) [L112] COND FALSE !(s__state == 8195) [L115] COND FALSE !(s__state == 8480) [L118] COND FALSE !(s__state == 8481) [L121] COND FALSE !(s__state == 8482) [L124] COND FALSE !(s__state == 8464) [L127] COND FALSE !(s__state == 8465) [L130] COND FALSE !(s__state == 8466) [L133] COND TRUE s__state == 8496 [L282] ret = __VERIFIER_nondet_int() [L283] COND TRUE blastFlag == 1 [L284] blastFlag = 2 [L286] COND FALSE !(ret <= 0) [L289] COND TRUE \read(s__hit) [L290] s__state = 8656 [L294] s__init_num = 0 [L583] COND FALSE !(! s__s3__tmp__reuse_message) [L600] skip = 0 [L97] COND TRUE 1 [L99] state = s__state [L100] COND FALSE !(s__state == 12292) [L103] COND FALSE !(s__state == 16384) [L106] COND FALSE !(s__state == 8192) [L109] COND FALSE !(s__state == 24576) [L112] COND FALSE !(s__state == 8195) [L115] COND FALSE !(s__state == 8480) [L118] COND FALSE !(s__state == 8481) [L121] COND FALSE !(s__state == 8482) [L124] COND FALSE !(s__state == 8464) [L127] COND FALSE !(s__state == 8465) [L130] COND FALSE !(s__state == 8466) [L133] COND FALSE !(s__state == 8496) [L136] COND FALSE !(s__state == 8497) [L139] COND FALSE !(s__state == 8512) [L142] COND FALSE !(s__state == 8513) [L145] COND FALSE !(s__state == 8528) [L148] COND FALSE !(s__state == 8529) [L151] COND FALSE !(s__state == 8544) [L154] COND FALSE !(s__state == 8545) [L157] COND FALSE !(s__state == 8560) [L160] COND FALSE !(s__state == 8561) [L163] COND FALSE !(s__state == 8448) [L166] COND FALSE !(s__state == 8576) [L169] COND FALSE !(s__state == 8577) [L172] COND FALSE !(s__state == 8592) [L175] COND FALSE !(s__state == 8593) [L178] COND FALSE !(s__state == 8608) [L181] COND FALSE !(s__state == 8609) [L184] COND FALSE !(s__state == 8640) [L187] COND FALSE !(s__state == 8641) [L190] COND TRUE s__state == 8656 [L488] s__session__cipher = s__s3__tmp__new_cipher [L489] tmp___9 = __VERIFIER_nondet_int() [L490] COND FALSE !(! tmp___9) [L494] ret = __VERIFIER_nondet_int() [L495] COND TRUE blastFlag == 2 [L496] blastFlag = 3 [L498] COND FALSE !(ret <= 0) [L501] s__state = 8672 [L502] s__init_num = 0 [L503] tmp___10 = __VERIFIER_nondet_int() [L504] COND FALSE !(! tmp___10) [L583] COND FALSE !(! s__s3__tmp__reuse_message) [L600] skip = 0 [L97] COND TRUE 1 [L99] state = s__state [L100] COND FALSE !(s__state == 12292) [L103] COND FALSE !(s__state == 16384) [L106] COND FALSE !(s__state == 8192) [L109] COND FALSE !(s__state == 24576) [L112] COND FALSE !(s__state == 8195) [L115] COND FALSE !(s__state == 8480) [L118] COND FALSE !(s__state == 8481) [L121] COND FALSE !(s__state == 8482) [L124] COND FALSE !(s__state == 8464) [L127] COND FALSE !(s__state == 8465) [L130] COND FALSE !(s__state == 8466) [L133] COND FALSE !(s__state == 8496) [L136] COND FALSE !(s__state == 8497) [L139] COND FALSE !(s__state == 8512) [L142] COND FALSE !(s__state == 8513) [L145] COND FALSE !(s__state == 8528) [L148] COND FALSE !(s__state == 8529) [L151] COND FALSE !(s__state == 8544) [L154] COND FALSE !(s__state == 8545) [L157] COND FALSE !(s__state == 8560) [L160] COND FALSE !(s__state == 8561) [L163] COND FALSE !(s__state == 8448) [L166] COND FALSE !(s__state == 8576) [L169] COND FALSE !(s__state == 8577) [L172] COND FALSE !(s__state == 8592) [L175] COND FALSE !(s__state == 8593) [L178] COND FALSE !(s__state == 8608) [L181] COND FALSE !(s__state == 8609) [L184] COND FALSE !(s__state == 8640) [L187] COND FALSE !(s__state == 8641) [L190] COND FALSE !(s__state == 8656) [L193] COND FALSE !(s__state == 8657) [L196] COND TRUE s__state == 8672 [L511] ret = __VERIFIER_nondet_int() [L512] COND FALSE !(blastFlag == 4) [L515] COND TRUE blastFlag == 3 [L611] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 151 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.8s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1299 SDtfs, 459 SDslu, 810 SDs, 0 SdLazy, 516 SolverSat, 145 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=765occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 6 MinimizatonAttempts, 86 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 620 NumberOfCodeBlocks, 620 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 487 ConstructedInterpolants, 0 QuantifiedInterpolants, 81167 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 218/218 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...