/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 enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 03:34:55,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 03:34:55,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 03:34:55,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 03:34:55,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 03:34:55,824 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 03:34:55,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 03:34:55,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 03:34:55,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 03:34:55,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 03:34:55,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 03:34:55,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 03:34:55,832 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 03:34:55,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 03:34:55,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 03:34:55,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 03:34:55,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 03:34:55,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 03:34:55,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 03:34:55,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 03:34:55,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 03:34:55,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 03:34:55,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 03:34:55,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 03:34:55,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 03:34:55,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 03:34:55,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 03:34:55,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 03:34:55,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 03:34:55,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-19 03:34:55,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 03:34:55,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 03:34:55,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 03:34:55,857 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 [2020-08-19 03:34:55,896 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 03:34:55,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 03:34:55,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 03:34:55,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 03:34:55,898 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 03:34:55,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 03:34:55,899 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 03:34:55,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 03:34:55,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 03:34:55,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 03:34:55,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 03:34:55,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 03:34:55,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 03:34:55,905 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 03:34:55,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 03:34:55,905 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 03:34:55,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 03:34:55,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 03:34:55,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 03:34:55,906 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 03:34:55,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 03:34:55,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 03:34:55,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 03:34:55,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 03:34:55,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 03:34:55,909 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 03:34:55,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 03:34:55,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 03:34:55,909 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 03:34:55,909 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 -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; [2020-08-19 03:34:56,205 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 03:34:56,221 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 03:34:56,224 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 03:34:56,226 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 03:34:56,227 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 03:34:56,228 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-19 03:34:56,289 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4232e291a/6564e8206d6e4540bf0e9943ca12022a/FLAG9c0001dd1 [2020-08-19 03:34:56,793 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 03:34:56,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-19 03:34:56,810 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4232e291a/6564e8206d6e4540bf0e9943ca12022a/FLAG9c0001dd1 [2020-08-19 03:34:57,068 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4232e291a/6564e8206d6e4540bf0e9943ca12022a [2020-08-19 03:34:57,077 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 03:34:57,079 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 03:34:57,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 03:34:57,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 03:34:57,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 03:34:57,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:34:57" (1/1) ... [2020-08-19 03:34:57,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@248d1cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:57, skipping insertion in model container [2020-08-19 03:34:57,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:34:57" (1/1) ... [2020-08-19 03:34:57,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 03:34:57,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 03:34:57,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:34:57,422 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 03:34:57,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:34:57,621 INFO L208 MainTranslator]: Completed translation [2020-08-19 03:34:57,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:57 WrapperNode [2020-08-19 03:34:57,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 03:34:57,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 03:34:57,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 03:34:57,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 03:34:57,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:57" (1/1) ... [2020-08-19 03:34:57,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:57" (1/1) ... [2020-08-19 03:34:57,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:57" (1/1) ... [2020-08-19 03:34:57,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:57" (1/1) ... [2020-08-19 03:34:57,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:57" (1/1) ... [2020-08-19 03:34:57,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:57" (1/1) ... [2020-08-19 03:34:57,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:57" (1/1) ... [2020-08-19 03:34:57,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 03:34:57,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 03:34:57,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 03:34:57,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 03:34:57,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:57" (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 [2020-08-19 03:34:57,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 03:34:57,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 03:34:57,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-19 03:34:57,746 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 03:34:57,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 03:34:57,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-19 03:34:57,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 03:34:57,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-19 03:34:57,747 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-19 03:34:57,747 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 03:34:57,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 03:34:57,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 03:34:57,962 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-19 03:34:58,550 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-19 03:34:58,550 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-19 03:34:58,562 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 03:34:58,563 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 03:34:58,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:34:58 BoogieIcfgContainer [2020-08-19 03:34:58,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 03:34:58,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 03:34:58,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 03:34:58,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 03:34:58,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 03:34:57" (1/3) ... [2020-08-19 03:34:58,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e71c16c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:34:58, skipping insertion in model container [2020-08-19 03:34:58,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:57" (2/3) ... [2020-08-19 03:34:58,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e71c16c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:34:58, skipping insertion in model container [2020-08-19 03:34:58,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:34:58" (3/3) ... [2020-08-19 03:34:58,579 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2020-08-19 03:34:58,590 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 03:34:58,599 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 03:34:58,613 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 03:34:58,636 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 03:34:58,637 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 03:34:58,637 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 03:34:58,637 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 03:34:58,637 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 03:34:58,638 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 03:34:58,638 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 03:34:58,638 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 03:34:58,660 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2020-08-19 03:34:58,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 03:34:58,669 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:34:58,670 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] [2020-08-19 03:34:58,670 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:34:58,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:34:58,676 INFO L82 PathProgramCache]: Analyzing trace with hash -2138433857, now seen corresponding path program 1 times [2020-08-19 03:34:58,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:34:58,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666738765] [2020-08-19 03:34:58,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:34:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:58,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:34:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:34:58,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666738765] [2020-08-19 03:34:58,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:34:58,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 03:34:58,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381268483] [2020-08-19 03:34:59,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 03:34:59,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:34:59,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 03:34:59,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 03:34:59,020 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 5 states. [2020-08-19 03:34:59,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:34:59,496 INFO L93 Difference]: Finished difference Result 375 states and 646 transitions. [2020-08-19 03:34:59,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 03:34:59,498 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-19 03:34:59,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:34:59,525 INFO L225 Difference]: With dead ends: 375 [2020-08-19 03:34:59,526 INFO L226 Difference]: Without dead ends: 194 [2020-08-19 03:34:59,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 03:34:59,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-19 03:34:59,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2020-08-19 03:34:59,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-19 03:34:59,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 279 transitions. [2020-08-19 03:34:59,636 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 279 transitions. Word has length 28 [2020-08-19 03:34:59,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:34:59,638 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 279 transitions. [2020-08-19 03:34:59,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 03:34:59,638 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 279 transitions. [2020-08-19 03:34:59,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 03:34:59,641 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:34:59,641 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] [2020-08-19 03:34:59,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 03:34:59,641 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:34:59,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:34:59,642 INFO L82 PathProgramCache]: Analyzing trace with hash 533516532, now seen corresponding path program 1 times [2020-08-19 03:34:59,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:34:59,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690333505] [2020-08-19 03:34:59,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:34:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:59,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:34:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:34:59,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690333505] [2020-08-19 03:34:59,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:34:59,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 03:34:59,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357718610] [2020-08-19 03:34:59,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 03:34:59,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:34:59,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 03:34:59,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 03:34:59,738 INFO L87 Difference]: Start difference. First operand 188 states and 279 transitions. Second operand 5 states. [2020-08-19 03:35:00,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:00,064 INFO L93 Difference]: Finished difference Result 448 states and 678 transitions. [2020-08-19 03:35:00,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 03:35:00,064 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-08-19 03:35:00,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:00,067 INFO L225 Difference]: With dead ends: 448 [2020-08-19 03:35:00,068 INFO L226 Difference]: Without dead ends: 260 [2020-08-19 03:35:00,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 03:35:00,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-08-19 03:35:00,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 245. [2020-08-19 03:35:00,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-08-19 03:35:00,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 372 transitions. [2020-08-19 03:35:00,098 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 372 transitions. Word has length 31 [2020-08-19 03:35:00,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:00,099 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 372 transitions. [2020-08-19 03:35:00,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 03:35:00,099 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 372 transitions. [2020-08-19 03:35:00,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-19 03:35:00,101 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:00,101 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] [2020-08-19 03:35:00,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 03:35:00,103 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:00,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:00,104 INFO L82 PathProgramCache]: Analyzing trace with hash 522773526, now seen corresponding path program 1 times [2020-08-19 03:35:00,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:00,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760560844] [2020-08-19 03:35:00,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:00,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:00,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760560844] [2020-08-19 03:35:00,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:00,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:00,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707931255] [2020-08-19 03:35:00,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:00,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:00,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:00,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:00,251 INFO L87 Difference]: Start difference. First operand 245 states and 372 transitions. Second operand 3 states. [2020-08-19 03:35:00,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:00,283 INFO L93 Difference]: Finished difference Result 698 states and 1061 transitions. [2020-08-19 03:35:00,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:00,283 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-08-19 03:35:00,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:00,287 INFO L225 Difference]: With dead ends: 698 [2020-08-19 03:35:00,287 INFO L226 Difference]: Without dead ends: 466 [2020-08-19 03:35:00,289 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 [2020-08-19 03:35:00,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-08-19 03:35:00,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 464. [2020-08-19 03:35:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-08-19 03:35:00,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 701 transitions. [2020-08-19 03:35:00,320 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 701 transitions. Word has length 32 [2020-08-19 03:35:00,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:00,321 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 701 transitions. [2020-08-19 03:35:00,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:00,321 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 701 transitions. [2020-08-19 03:35:00,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-19 03:35:00,323 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:00,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:00,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 03:35:00,324 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:00,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:00,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1890290600, now seen corresponding path program 1 times [2020-08-19 03:35:00,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:00,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978835422] [2020-08-19 03:35:00,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:00,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:00,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978835422] [2020-08-19 03:35:00,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:00,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 03:35:00,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146212073] [2020-08-19 03:35:00,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 03:35:00,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:00,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 03:35:00,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 03:35:00,415 INFO L87 Difference]: Start difference. First operand 464 states and 701 transitions. Second operand 6 states. [2020-08-19 03:35:00,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:00,750 INFO L93 Difference]: Finished difference Result 1155 states and 1779 transitions. [2020-08-19 03:35:00,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 03:35:00,751 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-19 03:35:00,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:00,756 INFO L225 Difference]: With dead ends: 1155 [2020-08-19 03:35:00,756 INFO L226 Difference]: Without dead ends: 655 [2020-08-19 03:35:00,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-19 03:35:00,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2020-08-19 03:35:00,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 526. [2020-08-19 03:35:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-19 03:35:00,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 799 transitions. [2020-08-19 03:35:00,792 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 799 transitions. Word has length 33 [2020-08-19 03:35:00,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:00,792 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 799 transitions. [2020-08-19 03:35:00,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 03:35:00,792 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 799 transitions. [2020-08-19 03:35:00,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-19 03:35:00,803 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:00,804 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-19 03:35:00,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 03:35:00,804 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:00,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:00,805 INFO L82 PathProgramCache]: Analyzing trace with hash 2094542434, now seen corresponding path program 1 times [2020-08-19 03:35:00,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:00,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419835781] [2020-08-19 03:35:00,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:00,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:00,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419835781] [2020-08-19 03:35:00,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:00,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:00,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060489392] [2020-08-19 03:35:00,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:00,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:00,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:00,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:00,878 INFO L87 Difference]: Start difference. First operand 526 states and 799 transitions. Second operand 3 states. [2020-08-19 03:35:00,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:00,899 INFO L93 Difference]: Finished difference Result 1038 states and 1580 transitions. [2020-08-19 03:35:00,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:00,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-08-19 03:35:00,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:00,903 INFO L225 Difference]: With dead ends: 1038 [2020-08-19 03:35:00,903 INFO L226 Difference]: Without dead ends: 526 [2020-08-19 03:35:00,905 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 [2020-08-19 03:35:00,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-08-19 03:35:00,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2020-08-19 03:35:00,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-19 03:35:00,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 786 transitions. [2020-08-19 03:35:00,928 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 786 transitions. Word has length 45 [2020-08-19 03:35:00,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:00,928 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 786 transitions. [2020-08-19 03:35:00,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:00,929 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 786 transitions. [2020-08-19 03:35:00,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-19 03:35:00,930 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:00,930 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] [2020-08-19 03:35:00,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 03:35:00,931 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:00,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:00,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1255579119, now seen corresponding path program 1 times [2020-08-19 03:35:00,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:00,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727600663] [2020-08-19 03:35:00,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:00,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:00,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727600663] [2020-08-19 03:35:00,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:00,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:00,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82282641] [2020-08-19 03:35:00,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:00,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:00,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:00,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:00,980 INFO L87 Difference]: Start difference. First operand 526 states and 786 transitions. Second operand 3 states. [2020-08-19 03:35:01,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:01,016 INFO L93 Difference]: Finished difference Result 1048 states and 1566 transitions. [2020-08-19 03:35:01,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:01,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-19 03:35:01,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:01,020 INFO L225 Difference]: With dead ends: 1048 [2020-08-19 03:35:01,020 INFO L226 Difference]: Without dead ends: 536 [2020-08-19 03:35:01,022 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 [2020-08-19 03:35:01,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-08-19 03:35:01,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 534. [2020-08-19 03:35:01,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-08-19 03:35:01,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 783 transitions. [2020-08-19 03:35:01,045 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 783 transitions. Word has length 46 [2020-08-19 03:35:01,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:01,046 INFO L479 AbstractCegarLoop]: Abstraction has 534 states and 783 transitions. [2020-08-19 03:35:01,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:01,046 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 783 transitions. [2020-08-19 03:35:01,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-19 03:35:01,047 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:01,047 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] [2020-08-19 03:35:01,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 03:35:01,048 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:01,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:01,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1258911171, now seen corresponding path program 1 times [2020-08-19 03:35:01,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:01,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829282178] [2020-08-19 03:35:01,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:01,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:01,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829282178] [2020-08-19 03:35:01,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:01,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:01,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956044167] [2020-08-19 03:35:01,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:01,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:01,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:01,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:01,089 INFO L87 Difference]: Start difference. First operand 534 states and 783 transitions. Second operand 3 states. [2020-08-19 03:35:01,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:01,347 INFO L93 Difference]: Finished difference Result 1234 states and 1810 transitions. [2020-08-19 03:35:01,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:01,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-08-19 03:35:01,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:01,352 INFO L225 Difference]: With dead ends: 1234 [2020-08-19 03:35:01,352 INFO L226 Difference]: Without dead ends: 670 [2020-08-19 03:35:01,354 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 [2020-08-19 03:35:01,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-08-19 03:35:01,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 585. [2020-08-19 03:35:01,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-08-19 03:35:01,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 857 transitions. [2020-08-19 03:35:01,379 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 857 transitions. Word has length 50 [2020-08-19 03:35:01,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:01,379 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 857 transitions. [2020-08-19 03:35:01,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:01,380 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 857 transitions. [2020-08-19 03:35:01,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-19 03:35:01,381 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:01,381 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] [2020-08-19 03:35:01,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 03:35:01,382 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:01,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:01,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1836171333, now seen corresponding path program 1 times [2020-08-19 03:35:01,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:01,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684899957] [2020-08-19 03:35:01,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:01,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:01,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684899957] [2020-08-19 03:35:01,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:01,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:01,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480778966] [2020-08-19 03:35:01,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:01,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:01,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:01,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:01,454 INFO L87 Difference]: Start difference. First operand 585 states and 857 transitions. Second operand 3 states. [2020-08-19 03:35:01,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:01,509 INFO L93 Difference]: Finished difference Result 1720 states and 2523 transitions. [2020-08-19 03:35:01,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:01,510 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-19 03:35:01,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:01,517 INFO L225 Difference]: With dead ends: 1720 [2020-08-19 03:35:01,517 INFO L226 Difference]: Without dead ends: 1149 [2020-08-19 03:35:01,520 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 [2020-08-19 03:35:01,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2020-08-19 03:35:01,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 883. [2020-08-19 03:35:01,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2020-08-19 03:35:01,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1291 transitions. [2020-08-19 03:35:01,570 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1291 transitions. Word has length 51 [2020-08-19 03:35:01,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:01,572 INFO L479 AbstractCegarLoop]: Abstraction has 883 states and 1291 transitions. [2020-08-19 03:35:01,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:01,573 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1291 transitions. [2020-08-19 03:35:01,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-19 03:35:01,574 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:01,574 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] [2020-08-19 03:35:01,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 03:35:01,575 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:01,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:01,575 INFO L82 PathProgramCache]: Analyzing trace with hash -2035149241, now seen corresponding path program 1 times [2020-08-19 03:35:01,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:01,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603664617] [2020-08-19 03:35:01,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:01,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:01,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603664617] [2020-08-19 03:35:01,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:01,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:01,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527189385] [2020-08-19 03:35:01,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:01,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:01,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:01,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:01,644 INFO L87 Difference]: Start difference. First operand 883 states and 1291 transitions. Second operand 3 states. [2020-08-19 03:35:01,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:01,716 INFO L93 Difference]: Finished difference Result 2602 states and 3797 transitions. [2020-08-19 03:35:01,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:01,717 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-19 03:35:01,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:01,730 INFO L225 Difference]: With dead ends: 2602 [2020-08-19 03:35:01,730 INFO L226 Difference]: Without dead ends: 1734 [2020-08-19 03:35:01,733 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 [2020-08-19 03:35:01,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-19 03:35:01,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1732. [2020-08-19 03:35:01,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1732 states. [2020-08-19 03:35:01,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2493 transitions. [2020-08-19 03:35:01,845 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2493 transitions. Word has length 51 [2020-08-19 03:35:01,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:01,846 INFO L479 AbstractCegarLoop]: Abstraction has 1732 states and 2493 transitions. [2020-08-19 03:35:01,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:01,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2493 transitions. [2020-08-19 03:35:01,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-19 03:35:01,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:01,848 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] [2020-08-19 03:35:01,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 03:35:01,848 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:01,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:01,849 INFO L82 PathProgramCache]: Analyzing trace with hash 407760342, now seen corresponding path program 1 times [2020-08-19 03:35:01,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:01,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708148312] [2020-08-19 03:35:01,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:01,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:01,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:01,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708148312] [2020-08-19 03:35:01,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:01,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:01,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598589134] [2020-08-19 03:35:01,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:01,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:01,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:01,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:01,898 INFO L87 Difference]: Start difference. First operand 1732 states and 2493 transitions. Second operand 3 states. [2020-08-19 03:35:02,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:02,106 INFO L93 Difference]: Finished difference Result 3635 states and 5182 transitions. [2020-08-19 03:35:02,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:02,107 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-19 03:35:02,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:02,118 INFO L225 Difference]: With dead ends: 3635 [2020-08-19 03:35:02,118 INFO L226 Difference]: Without dead ends: 1924 [2020-08-19 03:35:02,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:02,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2020-08-19 03:35:02,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1835. [2020-08-19 03:35:02,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-19 03:35:02,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2610 transitions. [2020-08-19 03:35:02,209 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2610 transitions. Word has length 52 [2020-08-19 03:35:02,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:02,209 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2610 transitions. [2020-08-19 03:35:02,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:02,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2610 transitions. [2020-08-19 03:35:02,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-19 03:35:02,211 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:02,212 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:02,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 03:35:02,212 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:02,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:02,212 INFO L82 PathProgramCache]: Analyzing trace with hash 675528416, now seen corresponding path program 1 times [2020-08-19 03:35:02,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:02,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398163316] [2020-08-19 03:35:02,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:02,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398163316] [2020-08-19 03:35:02,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:02,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:02,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42721520] [2020-08-19 03:35:02,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:02,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:02,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:02,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:02,265 INFO L87 Difference]: Start difference. First operand 1835 states and 2610 transitions. Second operand 3 states. [2020-08-19 03:35:02,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:02,517 INFO L93 Difference]: Finished difference Result 3747 states and 5296 transitions. [2020-08-19 03:35:02,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:02,517 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-19 03:35:02,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:02,530 INFO L225 Difference]: With dead ends: 3747 [2020-08-19 03:35:02,531 INFO L226 Difference]: Without dead ends: 1933 [2020-08-19 03:35:02,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:02,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2020-08-19 03:35:02,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1835. [2020-08-19 03:35:02,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-19 03:35:02,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2598 transitions. [2020-08-19 03:35:02,643 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2598 transitions. Word has length 53 [2020-08-19 03:35:02,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:02,644 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2598 transitions. [2020-08-19 03:35:02,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:02,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2598 transitions. [2020-08-19 03:35:02,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-19 03:35:02,646 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:02,646 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-19 03:35:02,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 03:35:02,646 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:02,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:02,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1835277023, now seen corresponding path program 1 times [2020-08-19 03:35:02,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:02,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931890062] [2020-08-19 03:35:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,697 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:02,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931890062] [2020-08-19 03:35:02,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:02,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:02,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163462410] [2020-08-19 03:35:02,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:02,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:02,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:02,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:02,699 INFO L87 Difference]: Start difference. First operand 1835 states and 2598 transitions. Second operand 3 states. [2020-08-19 03:35:02,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:02,911 INFO L93 Difference]: Finished difference Result 3744 states and 5269 transitions. [2020-08-19 03:35:02,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:02,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-19 03:35:02,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:02,921 INFO L225 Difference]: With dead ends: 3744 [2020-08-19 03:35:02,922 INFO L226 Difference]: Without dead ends: 1930 [2020-08-19 03:35:02,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:02,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-19 03:35:02,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1835. [2020-08-19 03:35:02,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-19 03:35:02,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2586 transitions. [2020-08-19 03:35:02,998 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2586 transitions. Word has length 53 [2020-08-19 03:35:02,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:02,998 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2586 transitions. [2020-08-19 03:35:02,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:02,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2586 transitions. [2020-08-19 03:35:03,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-19 03:35:03,000 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:03,000 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:03,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 03:35:03,001 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:03,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:03,001 INFO L82 PathProgramCache]: Analyzing trace with hash -194160723, now seen corresponding path program 1 times [2020-08-19 03:35:03,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:03,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632171101] [2020-08-19 03:35:03,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:03,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:03,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632171101] [2020-08-19 03:35:03,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:03,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:03,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831387167] [2020-08-19 03:35:03,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:03,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:03,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:03,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:03,044 INFO L87 Difference]: Start difference. First operand 1835 states and 2586 transitions. Second operand 3 states. [2020-08-19 03:35:03,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:03,243 INFO L93 Difference]: Finished difference Result 3741 states and 5251 transitions. [2020-08-19 03:35:03,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:03,243 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-08-19 03:35:03,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:03,253 INFO L225 Difference]: With dead ends: 3741 [2020-08-19 03:35:03,253 INFO L226 Difference]: Without dead ends: 1891 [2020-08-19 03:35:03,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:03,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2020-08-19 03:35:03,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1871. [2020-08-19 03:35:03,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-19 03:35:03,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2608 transitions. [2020-08-19 03:35:03,345 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2608 transitions. Word has length 56 [2020-08-19 03:35:03,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:03,346 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2608 transitions. [2020-08-19 03:35:03,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:03,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2608 transitions. [2020-08-19 03:35:03,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-19 03:35:03,348 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:03,348 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:03,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 03:35:03,348 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:03,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:03,349 INFO L82 PathProgramCache]: Analyzing trace with hash 991849692, now seen corresponding path program 1 times [2020-08-19 03:35:03,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:03,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370363031] [2020-08-19 03:35:03,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:03,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:03,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370363031] [2020-08-19 03:35:03,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:03,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:03,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722229880] [2020-08-19 03:35:03,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:03,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:03,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:03,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:03,393 INFO L87 Difference]: Start difference. First operand 1871 states and 2608 transitions. Second operand 3 states. [2020-08-19 03:35:03,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:03,607 INFO L93 Difference]: Finished difference Result 3810 states and 5283 transitions. [2020-08-19 03:35:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:03,607 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-08-19 03:35:03,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:03,617 INFO L225 Difference]: With dead ends: 3810 [2020-08-19 03:35:03,618 INFO L226 Difference]: Without dead ends: 1960 [2020-08-19 03:35:03,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:03,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2020-08-19 03:35:03,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1871. [2020-08-19 03:35:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-19 03:35:03,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2596 transitions. [2020-08-19 03:35:03,688 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2596 transitions. Word has length 57 [2020-08-19 03:35:03,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:03,689 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2596 transitions. [2020-08-19 03:35:03,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:03,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2596 transitions. [2020-08-19 03:35:03,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-19 03:35:03,690 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:03,691 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:03,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 03:35:03,691 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:03,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:03,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1291355310, now seen corresponding path program 1 times [2020-08-19 03:35:03,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:03,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649440350] [2020-08-19 03:35:03,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:03,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:03,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649440350] [2020-08-19 03:35:03,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:03,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:03,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154677928] [2020-08-19 03:35:03,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:03,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:03,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:03,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:03,745 INFO L87 Difference]: Start difference. First operand 1871 states and 2596 transitions. Second operand 3 states. [2020-08-19 03:35:03,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:03,946 INFO L93 Difference]: Finished difference Result 3946 states and 5421 transitions. [2020-08-19 03:35:03,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:03,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-08-19 03:35:03,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:03,957 INFO L225 Difference]: With dead ends: 3946 [2020-08-19 03:35:03,957 INFO L226 Difference]: Without dead ends: 2096 [2020-08-19 03:35:03,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:03,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2020-08-19 03:35:04,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2004. [2020-08-19 03:35:04,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2004 states. [2020-08-19 03:35:04,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 2743 transitions. [2020-08-19 03:35:04,079 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 2743 transitions. Word has length 58 [2020-08-19 03:35:04,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:04,079 INFO L479 AbstractCegarLoop]: Abstraction has 2004 states and 2743 transitions. [2020-08-19 03:35:04,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:04,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 2743 transitions. [2020-08-19 03:35:04,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-19 03:35:04,083 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:04,083 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-19 03:35:04,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 03:35:04,084 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:04,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:04,084 INFO L82 PathProgramCache]: Analyzing trace with hash -2083485680, now seen corresponding path program 1 times [2020-08-19 03:35:04,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:04,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090308199] [2020-08-19 03:35:04,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-19 03:35:04,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090308199] [2020-08-19 03:35:04,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:04,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:04,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994658424] [2020-08-19 03:35:04,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:04,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:04,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:04,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:04,118 INFO L87 Difference]: Start difference. First operand 2004 states and 2743 transitions. Second operand 3 states. [2020-08-19 03:35:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:04,379 INFO L93 Difference]: Finished difference Result 4276 states and 5918 transitions. [2020-08-19 03:35:04,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:04,379 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-19 03:35:04,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:04,390 INFO L225 Difference]: With dead ends: 4276 [2020-08-19 03:35:04,390 INFO L226 Difference]: Without dead ends: 2293 [2020-08-19 03:35:04,395 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 [2020-08-19 03:35:04,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2020-08-19 03:35:04,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2257. [2020-08-19 03:35:04,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2020-08-19 03:35:04,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3012 transitions. [2020-08-19 03:35:04,469 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3012 transitions. Word has length 61 [2020-08-19 03:35:04,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:04,469 INFO L479 AbstractCegarLoop]: Abstraction has 2257 states and 3012 transitions. [2020-08-19 03:35:04,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:04,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3012 transitions. [2020-08-19 03:35:04,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-19 03:35:04,471 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:04,471 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-19 03:35:04,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 03:35:04,472 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:04,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:04,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1403427310, now seen corresponding path program 1 times [2020-08-19 03:35:04,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:04,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039866567] [2020-08-19 03:35:04,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-19 03:35:04,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039866567] [2020-08-19 03:35:04,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:04,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:04,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925008045] [2020-08-19 03:35:04,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:04,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:04,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:04,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:04,520 INFO L87 Difference]: Start difference. First operand 2257 states and 3012 transitions. Second operand 3 states. [2020-08-19 03:35:04,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:04,590 INFO L93 Difference]: Finished difference Result 4420 states and 5869 transitions. [2020-08-19 03:35:04,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:04,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-19 03:35:04,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:04,604 INFO L225 Difference]: With dead ends: 4420 [2020-08-19 03:35:04,605 INFO L226 Difference]: Without dead ends: 2947 [2020-08-19 03:35:04,609 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 [2020-08-19 03:35:04,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2020-08-19 03:35:04,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2227. [2020-08-19 03:35:04,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2227 states. [2020-08-19 03:35:04,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 2957 transitions. [2020-08-19 03:35:04,696 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 2957 transitions. Word has length 61 [2020-08-19 03:35:04,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:04,696 INFO L479 AbstractCegarLoop]: Abstraction has 2227 states and 2957 transitions. [2020-08-19 03:35:04,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:04,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 2957 transitions. [2020-08-19 03:35:04,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-19 03:35:04,698 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:04,698 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-19 03:35:04,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 03:35:04,699 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:04,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:04,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425408, now seen corresponding path program 1 times [2020-08-19 03:35:04,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:04,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268716042] [2020-08-19 03:35:04,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 03:35:04,724 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 03:35:04,724 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 03:35:04,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 03:35:04,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 03:35:04 BoogieIcfgContainer [2020-08-19 03:35:04,772 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 03:35:04,777 INFO L168 Benchmark]: Toolchain (without parser) took 7695.41 ms. Allocated memory was 140.5 MB in the beginning and 320.3 MB in the end (delta: 179.8 MB). Free memory was 102.8 MB in the beginning and 91.3 MB in the end (delta: 11.5 MB). Peak memory consumption was 191.4 MB. Max. memory is 7.1 GB. [2020-08-19 03:35:04,778 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 03:35:04,783 INFO L168 Benchmark]: CACSL2BoogieTranslator took 540.63 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 102.4 MB in the beginning and 178.9 MB in the end (delta: -76.4 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. [2020-08-19 03:35:04,784 INFO L168 Benchmark]: Boogie Preprocessor took 64.29 ms. Allocated memory is still 203.9 MB. Free memory was 178.9 MB in the beginning and 176.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-08-19 03:35:04,785 INFO L168 Benchmark]: RCFGBuilder took 881.44 ms. Allocated memory is still 203.9 MB. Free memory was 176.2 MB in the beginning and 123.1 MB in the end (delta: 53.0 MB). Peak memory consumption was 53.0 MB. Max. memory is 7.1 GB. [2020-08-19 03:35:04,787 INFO L168 Benchmark]: TraceAbstraction took 6201.90 ms. Allocated memory was 203.9 MB in the beginning and 320.3 MB in the end (delta: 116.4 MB). Free memory was 122.5 MB in the beginning and 91.3 MB in the end (delta: 31.2 MB). Peak memory consumption was 147.6 MB. Max. memory is 7.1 GB. [2020-08-19 03:35:04,792 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 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 540.63 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 102.4 MB in the beginning and 178.9 MB in the end (delta: -76.4 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 64.29 ms. Allocated memory is still 203.9 MB. Free memory was 178.9 MB in the beginning and 176.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 881.44 ms. Allocated memory is still 203.9 MB. Free memory was 176.2 MB in the beginning and 123.1 MB in the end (delta: 53.0 MB). Peak memory consumption was 53.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6201.90 ms. Allocated memory was 203.9 MB in the beginning and 320.3 MB in the end (delta: 116.4 MB). Free memory was 122.5 MB in the beginning and 91.3 MB in the end (delta: 31.2 MB). Peak memory consumption was 147.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 640]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L645] int s ; [L646] int tmp ; [L650] s = 8464 [L651] 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 ; [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 ; [L42] unsigned long l ; [L43] unsigned long Time ; [L44] unsigned long tmp ; [L45] int cb ; [L46] long num1 = __VERIFIER_nondet_long() ; [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 = __VERIFIER_nondet_int() ; [L55] int tmp___4 = __VERIFIER_nondet_int() ; [L56] int tmp___5 = __VERIFIER_nondet_int() ; [L57] int tmp___6 = __VERIFIER_nondet_int() ; [L58] int tmp___7 ; [L59] long tmp___8 = __VERIFIER_nondet_long() ; [L60] int tmp___9 = __VERIFIER_nondet_int() ; [L61] int tmp___10 = __VERIFIER_nondet_int() ; [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 ; [L72] s__s3__tmp__reuse_message = 0 [L73] s__state = initial_state [L74] blastFlag = 0 [L75] tmp = __VERIFIER_nondet_int() [L76] Time = tmp [L77] cb = 0 [L78] ret = -1 [L79] skip = 0 [L80] got_new_session = 0 [L81] COND TRUE s__info_callback != 0 [L82] cb = s__info_callback [L88] s__in_handshake ++ [L89] COND TRUE tmp___1 + 12288 [L90] COND TRUE tmp___2 + 16384 [L94] COND FALSE !(s__cert == 0) [L98] COND TRUE 1 [L100] state = s__state [L101] COND FALSE !(s__state == 12292) [L104] COND FALSE !(s__state == 16384) [L107] COND FALSE !(s__state == 8192) [L110] COND FALSE !(s__state == 24576) [L113] COND FALSE !(s__state == 8195) [L116] COND FALSE !(s__state == 8480) [L119] COND FALSE !(s__state == 8481) [L122] COND FALSE !(s__state == 8482) [L125] COND TRUE s__state == 8464 [L271] s__shutdown = 0 [L272] ret = __VERIFIER_nondet_int() [L273] COND TRUE blastFlag == 0 [L274] blastFlag = 1 [L276] COND FALSE !(ret <= 0) [L279] got_new_session = 1 [L280] s__state = 8496 [L281] s__init_num = 0 [L602] COND TRUE ! s__s3__tmp__reuse_message [L603] COND TRUE ! skip [L604] COND TRUE tmp___1 != -12288 [L605] COND TRUE s__state != 8656 [L606] COND TRUE tmp___2 != -16384 [L607] COND FALSE !(state == 8496) [L614] COND FALSE !(\read(s__debug)) [L620] COND TRUE cb != 0 [L621] COND TRUE s__state != state [L622] new_state = s__state [L623] s__state = state [L624] s__state = new_state [L629] skip = 0 [L98] COND TRUE 1 [L100] state = s__state [L101] COND FALSE !(s__state == 12292) [L104] COND FALSE !(s__state == 16384) [L107] COND FALSE !(s__state == 8192) [L110] COND FALSE !(s__state == 24576) [L113] COND FALSE !(s__state == 8195) [L116] COND FALSE !(s__state == 8480) [L119] COND FALSE !(s__state == 8481) [L122] COND FALSE !(s__state == 8482) [L125] COND FALSE !(s__state == 8464) [L128] COND FALSE !(s__state == 8465) [L131] COND FALSE !(s__state == 8466) [L134] COND TRUE s__state == 8496 [L285] ret = __VERIFIER_nondet_int() [L286] COND TRUE blastFlag == 1 [L287] blastFlag = 2 [L289] COND FALSE !(ret <= 0) [L292] COND FALSE !(\read(s__hit)) [L295] s__state = 8512 [L297] s__init_num = 0 [L602] COND TRUE ! s__s3__tmp__reuse_message [L603] COND TRUE ! skip [L604] COND TRUE tmp___1 != -12288 [L605] COND TRUE s__state != 8656 [L606] COND TRUE tmp___2 != -16384 [L607] COND TRUE state == 8496 [L640] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 159 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.0s, OverallIterations: 18, TraceHistogramMax: 2, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3811 SDtfs, 3555 SDslu, 2450 SDs, 0 SdLazy, 1370 SolverSat, 407 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2257occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 1746 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 880 NumberOfCodeBlocks, 880 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 801 ConstructedInterpolants, 0 QuantifiedInterpolants, 88846 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 188/188 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...