/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=0.5 -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 06:49:02,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:49:02,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:49:02,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:49:02,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:49:02,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:49:02,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:49:02,823 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:49:02,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:49:02,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:49:02,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:49:02,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:49:02,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:49:02,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:49:02,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:49:02,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:49:02,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:49:02,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:49:02,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:49:02,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:49:02,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:49:02,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:49:02,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:49:02,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:49:02,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 06:49:02,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 06:49:02,843 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 06:49:02,844 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 06:49:02,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 06:49:02,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-19 06:49:02,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:49:02,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:49:02,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:49:02,852 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 06:49:02,876 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:49:02,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:49:02,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:49:02,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:49:02,878 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:49:02,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:49:02,879 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:49:02,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:49:02,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:49:02,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:49:02,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:49:02,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:49:02,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:49:02,880 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:49:02,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:49:02,880 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:49:02,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:49:02,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:49:02,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:49:02,881 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:49:02,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:49:02,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:49:02,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:49:02,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:49:02,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:49:02,882 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:49:02,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:49:02,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:49:02,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:49:02,883 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=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; [2020-08-19 06:49:03,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:49:03,170 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:49:03,173 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:49:03,175 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:49:03,175 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:49:03,176 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-19 06:49:03,255 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7075d873e/fb6f50b6ac264f7c90b2f4635dbabb8f/FLAG02ae1b107 [2020-08-19 06:49:03,760 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:49:03,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-19 06:49:03,774 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7075d873e/fb6f50b6ac264f7c90b2f4635dbabb8f/FLAG02ae1b107 [2020-08-19 06:49:04,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7075d873e/fb6f50b6ac264f7c90b2f4635dbabb8f [2020-08-19 06:49:04,100 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:49:04,101 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:49:04,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:49:04,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:49:04,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:49:04,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:49:04" (1/1) ... [2020-08-19 06:49:04,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21ea6fb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:04, skipping insertion in model container [2020-08-19 06:49:04,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:49:04" (1/1) ... [2020-08-19 06:49:04,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:49:04,165 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:49:04,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:49:04,434 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:49:04,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:49:04,595 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:49:04,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:04 WrapperNode [2020-08-19 06:49:04,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:49:04,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:49:04,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:49:04,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:49:04,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:04" (1/1) ... [2020-08-19 06:49:04,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:04" (1/1) ... [2020-08-19 06:49:04,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:04" (1/1) ... [2020-08-19 06:49:04,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:04" (1/1) ... [2020-08-19 06:49:04,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:04" (1/1) ... [2020-08-19 06:49:04,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:04" (1/1) ... [2020-08-19 06:49:04,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:04" (1/1) ... [2020-08-19 06:49:04,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:49:04,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:49:04,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:49:04,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:49:04,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:04" (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 06:49:04,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:49:04,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:49:04,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-19 06:49:04,763 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:49:04,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:49:04,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-19 06:49:04,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 06:49:04,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-19 06:49:04,765 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-19 06:49:04,766 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:49:04,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:49:04,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:49:04,993 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-19 06:49:05,547 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-19 06:49:05,548 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-19 06:49:05,560 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:49:05,561 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 06:49:05,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:49:05 BoogieIcfgContainer [2020-08-19 06:49:05,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:49:05,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:49:05,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:49:05,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:49:05,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:49:04" (1/3) ... [2020-08-19 06:49:05,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362a3c67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:49:05, skipping insertion in model container [2020-08-19 06:49:05,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:04" (2/3) ... [2020-08-19 06:49:05,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362a3c67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:49:05, skipping insertion in model container [2020-08-19 06:49:05,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:49:05" (3/3) ... [2020-08-19 06:49:05,577 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2020-08-19 06:49:05,588 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:49:05,598 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:49:05,614 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:49:05,643 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:49:05,643 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:49:05,643 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:49:05,644 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:49:05,644 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:49:05,644 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:49:05,644 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:49:05,644 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:49:05,671 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2020-08-19 06:49:05,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 06:49:05,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:05,680 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 06:49:05,681 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:05,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:05,686 INFO L82 PathProgramCache]: Analyzing trace with hash -2138433857, now seen corresponding path program 1 times [2020-08-19 06:49:05,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:05,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173658862] [2020-08-19 06:49:05,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:05,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:05,997 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 06:49:05,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173658862] [2020-08-19 06:49:06,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:06,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:49:06,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728527985] [2020-08-19 06:49:06,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:49:06,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:06,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:49:06,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:49:06,027 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 5 states. [2020-08-19 06:49:06,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:06,597 INFO L93 Difference]: Finished difference Result 375 states and 646 transitions. [2020-08-19 06:49:06,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:49:06,601 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-19 06:49:06,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:06,629 INFO L225 Difference]: With dead ends: 375 [2020-08-19 06:49:06,629 INFO L226 Difference]: Without dead ends: 194 [2020-08-19 06:49:06,636 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 06:49:06,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-19 06:49:06,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2020-08-19 06:49:06,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-19 06:49:06,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 279 transitions. [2020-08-19 06:49:06,702 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 279 transitions. Word has length 28 [2020-08-19 06:49:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:06,702 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 279 transitions. [2020-08-19 06:49:06,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:49:06,703 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 279 transitions. [2020-08-19 06:49:06,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 06:49:06,704 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:06,705 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 06:49:06,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:49:06,705 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:06,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:06,706 INFO L82 PathProgramCache]: Analyzing trace with hash 533516532, now seen corresponding path program 1 times [2020-08-19 06:49:06,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:06,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45968385] [2020-08-19 06:49:06,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:06,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:06,805 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 06:49:06,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45968385] [2020-08-19 06:49:06,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:06,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:49:06,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163189307] [2020-08-19 06:49:06,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:49:06,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:06,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:49:06,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:49:06,809 INFO L87 Difference]: Start difference. First operand 188 states and 279 transitions. Second operand 5 states. [2020-08-19 06:49:07,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:07,154 INFO L93 Difference]: Finished difference Result 448 states and 678 transitions. [2020-08-19 06:49:07,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:49:07,155 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-08-19 06:49:07,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:07,158 INFO L225 Difference]: With dead ends: 448 [2020-08-19 06:49:07,159 INFO L226 Difference]: Without dead ends: 260 [2020-08-19 06:49:07,163 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 06:49:07,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-08-19 06:49:07,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 245. [2020-08-19 06:49:07,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-08-19 06:49:07,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 372 transitions. [2020-08-19 06:49:07,214 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 372 transitions. Word has length 31 [2020-08-19 06:49:07,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:07,215 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 372 transitions. [2020-08-19 06:49:07,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:49:07,216 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 372 transitions. [2020-08-19 06:49:07,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-19 06:49:07,217 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:07,217 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 06:49:07,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:49:07,218 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:07,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:07,219 INFO L82 PathProgramCache]: Analyzing trace with hash 522773526, now seen corresponding path program 1 times [2020-08-19 06:49:07,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:07,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266126478] [2020-08-19 06:49:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,376 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 06:49:07,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266126478] [2020-08-19 06:49:07,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:07,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:07,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430152908] [2020-08-19 06:49:07,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:07,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:07,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:07,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:07,380 INFO L87 Difference]: Start difference. First operand 245 states and 372 transitions. Second operand 3 states. [2020-08-19 06:49:07,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:07,432 INFO L93 Difference]: Finished difference Result 698 states and 1061 transitions. [2020-08-19 06:49:07,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:07,435 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-08-19 06:49:07,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:07,439 INFO L225 Difference]: With dead ends: 698 [2020-08-19 06:49:07,439 INFO L226 Difference]: Without dead ends: 466 [2020-08-19 06:49:07,444 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 06:49:07,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-08-19 06:49:07,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 464. [2020-08-19 06:49:07,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-08-19 06:49:07,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 701 transitions. [2020-08-19 06:49:07,504 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 701 transitions. Word has length 32 [2020-08-19 06:49:07,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:07,505 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 701 transitions. [2020-08-19 06:49:07,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:07,505 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 701 transitions. [2020-08-19 06:49:07,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-19 06:49:07,515 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:07,515 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 06:49:07,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:49:07,516 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:07,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:07,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1890290600, now seen corresponding path program 1 times [2020-08-19 06:49:07,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:07,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115538444] [2020-08-19 06:49:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:07,644 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 06:49:07,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115538444] [2020-08-19 06:49:07,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:07,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 06:49:07,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750022781] [2020-08-19 06:49:07,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:49:07,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:07,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:49:07,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:49:07,648 INFO L87 Difference]: Start difference. First operand 464 states and 701 transitions. Second operand 6 states. [2020-08-19 06:49:07,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:07,966 INFO L93 Difference]: Finished difference Result 1155 states and 1779 transitions. [2020-08-19 06:49:07,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:49:07,967 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-19 06:49:07,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:07,971 INFO L225 Difference]: With dead ends: 1155 [2020-08-19 06:49:07,971 INFO L226 Difference]: Without dead ends: 655 [2020-08-19 06:49:07,973 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 06:49:07,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2020-08-19 06:49:07,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 526. [2020-08-19 06:49:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-19 06:49:07,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 799 transitions. [2020-08-19 06:49:07,998 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 799 transitions. Word has length 33 [2020-08-19 06:49:07,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:07,999 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 799 transitions. [2020-08-19 06:49:07,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:49:07,999 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 799 transitions. [2020-08-19 06:49:08,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-19 06:49:08,001 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:08,001 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 06:49:08,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:49:08,001 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:08,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:08,002 INFO L82 PathProgramCache]: Analyzing trace with hash 2094542434, now seen corresponding path program 1 times [2020-08-19 06:49:08,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:08,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934887855] [2020-08-19 06:49:08,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,046 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 06:49:08,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934887855] [2020-08-19 06:49:08,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:08,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:08,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805776662] [2020-08-19 06:49:08,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:08,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:08,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:08,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:08,048 INFO L87 Difference]: Start difference. First operand 526 states and 799 transitions. Second operand 3 states. [2020-08-19 06:49:08,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:08,069 INFO L93 Difference]: Finished difference Result 1038 states and 1580 transitions. [2020-08-19 06:49:08,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:08,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-08-19 06:49:08,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:08,073 INFO L225 Difference]: With dead ends: 1038 [2020-08-19 06:49:08,073 INFO L226 Difference]: Without dead ends: 526 [2020-08-19 06:49:08,075 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 06:49:08,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-08-19 06:49:08,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2020-08-19 06:49:08,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-19 06:49:08,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 786 transitions. [2020-08-19 06:49:08,096 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 786 transitions. Word has length 45 [2020-08-19 06:49:08,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:08,096 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 786 transitions. [2020-08-19 06:49:08,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:08,096 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 786 transitions. [2020-08-19 06:49:08,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-19 06:49:08,098 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:08,098 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 06:49:08,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:49:08,099 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:08,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:08,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1255579119, now seen corresponding path program 1 times [2020-08-19 06:49:08,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:08,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230178660] [2020-08-19 06:49:08,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,138 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 06:49:08,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230178660] [2020-08-19 06:49:08,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:08,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:08,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836179994] [2020-08-19 06:49:08,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:08,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:08,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:08,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:08,141 INFO L87 Difference]: Start difference. First operand 526 states and 786 transitions. Second operand 3 states. [2020-08-19 06:49:08,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:08,179 INFO L93 Difference]: Finished difference Result 1048 states and 1566 transitions. [2020-08-19 06:49:08,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:08,180 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-19 06:49:08,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:08,184 INFO L225 Difference]: With dead ends: 1048 [2020-08-19 06:49:08,184 INFO L226 Difference]: Without dead ends: 536 [2020-08-19 06:49:08,185 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 06:49:08,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-08-19 06:49:08,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 534. [2020-08-19 06:49:08,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-08-19 06:49:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 783 transitions. [2020-08-19 06:49:08,208 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 783 transitions. Word has length 46 [2020-08-19 06:49:08,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:08,208 INFO L479 AbstractCegarLoop]: Abstraction has 534 states and 783 transitions. [2020-08-19 06:49:08,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:08,208 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 783 transitions. [2020-08-19 06:49:08,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-19 06:49:08,210 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:08,210 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 06:49:08,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:49:08,210 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:08,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:08,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1258911171, now seen corresponding path program 1 times [2020-08-19 06:49:08,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:08,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464318677] [2020-08-19 06:49:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,249 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 06:49:08,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464318677] [2020-08-19 06:49:08,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:08,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:08,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131326494] [2020-08-19 06:49:08,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:08,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:08,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:08,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:08,251 INFO L87 Difference]: Start difference. First operand 534 states and 783 transitions. Second operand 3 states. [2020-08-19 06:49:08,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:08,504 INFO L93 Difference]: Finished difference Result 1234 states and 1810 transitions. [2020-08-19 06:49:08,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:08,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-08-19 06:49:08,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:08,508 INFO L225 Difference]: With dead ends: 1234 [2020-08-19 06:49:08,508 INFO L226 Difference]: Without dead ends: 670 [2020-08-19 06:49:08,510 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 06:49:08,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-08-19 06:49:08,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 585. [2020-08-19 06:49:08,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-08-19 06:49:08,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 857 transitions. [2020-08-19 06:49:08,546 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 857 transitions. Word has length 50 [2020-08-19 06:49:08,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:08,547 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 857 transitions. [2020-08-19 06:49:08,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:08,547 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 857 transitions. [2020-08-19 06:49:08,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-19 06:49:08,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:08,549 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 06:49:08,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:49:08,549 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:08,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:08,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1836171333, now seen corresponding path program 1 times [2020-08-19 06:49:08,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:08,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002941935] [2020-08-19 06:49:08,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,598 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 06:49:08,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002941935] [2020-08-19 06:49:08,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:08,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:08,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198535398] [2020-08-19 06:49:08,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:08,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:08,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:08,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:08,601 INFO L87 Difference]: Start difference. First operand 585 states and 857 transitions. Second operand 3 states. [2020-08-19 06:49:08,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:08,655 INFO L93 Difference]: Finished difference Result 1720 states and 2523 transitions. [2020-08-19 06:49:08,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:08,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-19 06:49:08,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:08,665 INFO L225 Difference]: With dead ends: 1720 [2020-08-19 06:49:08,665 INFO L226 Difference]: Without dead ends: 1149 [2020-08-19 06:49:08,668 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 06:49:08,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2020-08-19 06:49:08,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 883. [2020-08-19 06:49:08,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2020-08-19 06:49:08,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1291 transitions. [2020-08-19 06:49:08,723 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1291 transitions. Word has length 51 [2020-08-19 06:49:08,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:08,723 INFO L479 AbstractCegarLoop]: Abstraction has 883 states and 1291 transitions. [2020-08-19 06:49:08,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:08,723 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1291 transitions. [2020-08-19 06:49:08,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-19 06:49:08,724 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:08,725 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 06:49:08,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:49:08,725 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:08,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:08,726 INFO L82 PathProgramCache]: Analyzing trace with hash -2035149241, now seen corresponding path program 1 times [2020-08-19 06:49:08,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:08,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648528204] [2020-08-19 06:49:08,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,799 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 06:49:08,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648528204] [2020-08-19 06:49:08,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:08,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:08,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532339237] [2020-08-19 06:49:08,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:08,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:08,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:08,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:08,805 INFO L87 Difference]: Start difference. First operand 883 states and 1291 transitions. Second operand 3 states. [2020-08-19 06:49:08,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:08,902 INFO L93 Difference]: Finished difference Result 2602 states and 3797 transitions. [2020-08-19 06:49:08,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:08,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-19 06:49:08,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:08,919 INFO L225 Difference]: With dead ends: 2602 [2020-08-19 06:49:08,920 INFO L226 Difference]: Without dead ends: 1734 [2020-08-19 06:49:08,924 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 06:49:08,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-19 06:49:08,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1732. [2020-08-19 06:49:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1732 states. [2020-08-19 06:49:09,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2493 transitions. [2020-08-19 06:49:09,003 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2493 transitions. Word has length 51 [2020-08-19 06:49:09,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:09,003 INFO L479 AbstractCegarLoop]: Abstraction has 1732 states and 2493 transitions. [2020-08-19 06:49:09,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:09,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2493 transitions. [2020-08-19 06:49:09,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-19 06:49:09,007 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:09,008 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 06:49:09,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:49:09,008 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:09,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:09,038 INFO L82 PathProgramCache]: Analyzing trace with hash 407760342, now seen corresponding path program 1 times [2020-08-19 06:49:09,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:09,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768743642] [2020-08-19 06:49:09,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,082 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 06:49:09,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768743642] [2020-08-19 06:49:09,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:09,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:09,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607618602] [2020-08-19 06:49:09,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:09,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:09,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:09,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:09,084 INFO L87 Difference]: Start difference. First operand 1732 states and 2493 transitions. Second operand 3 states. [2020-08-19 06:49:09,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:09,272 INFO L93 Difference]: Finished difference Result 3635 states and 5182 transitions. [2020-08-19 06:49:09,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:09,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-19 06:49:09,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:09,282 INFO L225 Difference]: With dead ends: 3635 [2020-08-19 06:49:09,282 INFO L226 Difference]: Without dead ends: 1924 [2020-08-19 06:49:09,286 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 06:49:09,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2020-08-19 06:49:09,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1835. [2020-08-19 06:49:09,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-19 06:49:09,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2610 transitions. [2020-08-19 06:49:09,366 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2610 transitions. Word has length 52 [2020-08-19 06:49:09,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:09,366 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2610 transitions. [2020-08-19 06:49:09,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:09,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2610 transitions. [2020-08-19 06:49:09,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-19 06:49:09,368 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:09,368 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 06:49:09,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:49:09,369 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:09,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:09,369 INFO L82 PathProgramCache]: Analyzing trace with hash 675528416, now seen corresponding path program 1 times [2020-08-19 06:49:09,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:09,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897952006] [2020-08-19 06:49:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:09,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,412 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 06:49:09,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897952006] [2020-08-19 06:49:09,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:09,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:09,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275774424] [2020-08-19 06:49:09,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:09,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:09,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:09,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:09,415 INFO L87 Difference]: Start difference. First operand 1835 states and 2610 transitions. Second operand 3 states. [2020-08-19 06:49:09,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:09,629 INFO L93 Difference]: Finished difference Result 3747 states and 5296 transitions. [2020-08-19 06:49:09,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:09,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-19 06:49:09,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:09,639 INFO L225 Difference]: With dead ends: 3747 [2020-08-19 06:49:09,640 INFO L226 Difference]: Without dead ends: 1933 [2020-08-19 06:49:09,645 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 06:49:09,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2020-08-19 06:49:09,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1835. [2020-08-19 06:49:09,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-19 06:49:09,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2598 transitions. [2020-08-19 06:49:09,739 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2598 transitions. Word has length 53 [2020-08-19 06:49:09,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:09,740 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2598 transitions. [2020-08-19 06:49:09,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:09,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2598 transitions. [2020-08-19 06:49:09,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-19 06:49:09,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:09,742 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 06:49:09,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:49:09,742 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:09,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:09,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1835277023, now seen corresponding path program 1 times [2020-08-19 06:49:09,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:09,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646822616] [2020-08-19 06:49:09,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,824 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 06:49:09,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646822616] [2020-08-19 06:49:09,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:09,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:09,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666989048] [2020-08-19 06:49:09,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:09,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:09,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:09,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:09,827 INFO L87 Difference]: Start difference. First operand 1835 states and 2598 transitions. Second operand 3 states. [2020-08-19 06:49:10,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:10,016 INFO L93 Difference]: Finished difference Result 3744 states and 5269 transitions. [2020-08-19 06:49:10,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:10,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-19 06:49:10,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:10,027 INFO L225 Difference]: With dead ends: 3744 [2020-08-19 06:49:10,027 INFO L226 Difference]: Without dead ends: 1930 [2020-08-19 06:49:10,031 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 06:49:10,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-19 06:49:10,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1835. [2020-08-19 06:49:10,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-19 06:49:10,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2586 transitions. [2020-08-19 06:49:10,106 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2586 transitions. Word has length 53 [2020-08-19 06:49:10,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:10,106 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2586 transitions. [2020-08-19 06:49:10,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:10,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2586 transitions. [2020-08-19 06:49:10,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-19 06:49:10,108 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:10,108 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 06:49:10,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 06:49:10,108 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:10,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:10,109 INFO L82 PathProgramCache]: Analyzing trace with hash -194160723, now seen corresponding path program 1 times [2020-08-19 06:49:10,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:10,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536169887] [2020-08-19 06:49:10,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:10,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:10,150 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 06:49:10,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536169887] [2020-08-19 06:49:10,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:10,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:10,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215547891] [2020-08-19 06:49:10,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:10,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:10,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:10,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:10,152 INFO L87 Difference]: Start difference. First operand 1835 states and 2586 transitions. Second operand 3 states. [2020-08-19 06:49:10,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:10,339 INFO L93 Difference]: Finished difference Result 3741 states and 5251 transitions. [2020-08-19 06:49:10,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:10,340 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-08-19 06:49:10,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:10,349 INFO L225 Difference]: With dead ends: 3741 [2020-08-19 06:49:10,350 INFO L226 Difference]: Without dead ends: 1891 [2020-08-19 06:49:10,354 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 06:49:10,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2020-08-19 06:49:10,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1871. [2020-08-19 06:49:10,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-19 06:49:10,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2608 transitions. [2020-08-19 06:49:10,423 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2608 transitions. Word has length 56 [2020-08-19 06:49:10,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:10,423 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2608 transitions. [2020-08-19 06:49:10,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:10,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2608 transitions. [2020-08-19 06:49:10,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-19 06:49:10,425 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:10,425 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 06:49:10,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 06:49:10,425 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:10,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:10,426 INFO L82 PathProgramCache]: Analyzing trace with hash 991849692, now seen corresponding path program 1 times [2020-08-19 06:49:10,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:10,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170559893] [2020-08-19 06:49:10,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:10,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:10,524 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 06:49:10,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170559893] [2020-08-19 06:49:10,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:10,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:10,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499590816] [2020-08-19 06:49:10,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:10,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:10,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:10,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:10,527 INFO L87 Difference]: Start difference. First operand 1871 states and 2608 transitions. Second operand 3 states. [2020-08-19 06:49:10,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:10,769 INFO L93 Difference]: Finished difference Result 3810 states and 5283 transitions. [2020-08-19 06:49:10,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:10,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-08-19 06:49:10,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:10,780 INFO L225 Difference]: With dead ends: 3810 [2020-08-19 06:49:10,780 INFO L226 Difference]: Without dead ends: 1960 [2020-08-19 06:49:10,785 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 06:49:10,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2020-08-19 06:49:10,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1871. [2020-08-19 06:49:10,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-19 06:49:10,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2596 transitions. [2020-08-19 06:49:10,865 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2596 transitions. Word has length 57 [2020-08-19 06:49:10,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:10,865 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2596 transitions. [2020-08-19 06:49:10,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:10,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2596 transitions. [2020-08-19 06:49:10,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-19 06:49:10,869 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:10,869 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 06:49:10,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 06:49:10,869 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:10,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:10,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1291355310, now seen corresponding path program 1 times [2020-08-19 06:49:10,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:10,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708312524] [2020-08-19 06:49:10,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:10,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:10,927 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 06:49:10,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708312524] [2020-08-19 06:49:10,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:10,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:10,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230751439] [2020-08-19 06:49:10,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:10,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:10,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:10,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:10,929 INFO L87 Difference]: Start difference. First operand 1871 states and 2596 transitions. Second operand 3 states. [2020-08-19 06:49:11,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:11,134 INFO L93 Difference]: Finished difference Result 3946 states and 5421 transitions. [2020-08-19 06:49:11,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:11,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-08-19 06:49:11,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:11,146 INFO L225 Difference]: With dead ends: 3946 [2020-08-19 06:49:11,146 INFO L226 Difference]: Without dead ends: 2096 [2020-08-19 06:49:11,153 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 06:49:11,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2020-08-19 06:49:11,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2004. [2020-08-19 06:49:11,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2004 states. [2020-08-19 06:49:11,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 2743 transitions. [2020-08-19 06:49:11,235 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 2743 transitions. Word has length 58 [2020-08-19 06:49:11,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:11,235 INFO L479 AbstractCegarLoop]: Abstraction has 2004 states and 2743 transitions. [2020-08-19 06:49:11,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:11,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 2743 transitions. [2020-08-19 06:49:11,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-19 06:49:11,240 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:11,241 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 06:49:11,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 06:49:11,241 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:11,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:11,241 INFO L82 PathProgramCache]: Analyzing trace with hash -2083485680, now seen corresponding path program 1 times [2020-08-19 06:49:11,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:11,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377165507] [2020-08-19 06:49:11,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:11,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,278 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 06:49:11,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377165507] [2020-08-19 06:49:11,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:11,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:11,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420698730] [2020-08-19 06:49:11,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:11,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:11,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:11,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:11,281 INFO L87 Difference]: Start difference. First operand 2004 states and 2743 transitions. Second operand 3 states. [2020-08-19 06:49:11,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:11,523 INFO L93 Difference]: Finished difference Result 4276 states and 5918 transitions. [2020-08-19 06:49:11,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:11,523 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-19 06:49:11,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:11,533 INFO L225 Difference]: With dead ends: 4276 [2020-08-19 06:49:11,534 INFO L226 Difference]: Without dead ends: 2293 [2020-08-19 06:49:11,538 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 06:49:11,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2020-08-19 06:49:11,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2257. [2020-08-19 06:49:11,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2020-08-19 06:49:11,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3012 transitions. [2020-08-19 06:49:11,617 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3012 transitions. Word has length 61 [2020-08-19 06:49:11,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:11,618 INFO L479 AbstractCegarLoop]: Abstraction has 2257 states and 3012 transitions. [2020-08-19 06:49:11,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:11,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3012 transitions. [2020-08-19 06:49:11,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-19 06:49:11,619 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:11,620 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 06:49:11,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 06:49:11,620 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:11,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:11,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1403427310, now seen corresponding path program 1 times [2020-08-19 06:49:11,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:11,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053234161] [2020-08-19 06:49:11,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,674 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 06:49:11,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053234161] [2020-08-19 06:49:11,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:11,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:11,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718791558] [2020-08-19 06:49:11,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:11,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:11,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:11,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:11,677 INFO L87 Difference]: Start difference. First operand 2257 states and 3012 transitions. Second operand 3 states. [2020-08-19 06:49:11,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:11,746 INFO L93 Difference]: Finished difference Result 4420 states and 5869 transitions. [2020-08-19 06:49:11,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:11,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-19 06:49:11,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:11,759 INFO L225 Difference]: With dead ends: 4420 [2020-08-19 06:49:11,759 INFO L226 Difference]: Without dead ends: 2947 [2020-08-19 06:49:11,763 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 06:49:11,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2020-08-19 06:49:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2227. [2020-08-19 06:49:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2227 states. [2020-08-19 06:49:11,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 2957 transitions. [2020-08-19 06:49:11,852 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 2957 transitions. Word has length 61 [2020-08-19 06:49:11,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:11,853 INFO L479 AbstractCegarLoop]: Abstraction has 2227 states and 2957 transitions. [2020-08-19 06:49:11,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:11,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 2957 transitions. [2020-08-19 06:49:11,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-19 06:49:11,854 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:11,854 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 06:49:11,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 06:49:11,855 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:11,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:11,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425408, now seen corresponding path program 1 times [2020-08-19 06:49:11,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:11,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376359164] [2020-08-19 06:49:11,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 06:49:11,883 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 06:49:11,883 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 06:49:11,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 06:49:11,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 06:49:11 BoogieIcfgContainer [2020-08-19 06:49:11,947 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 06:49:11,954 INFO L168 Benchmark]: Toolchain (without parser) took 7847.70 ms. Allocated memory was 139.5 MB in the beginning and 333.4 MB in the end (delta: 194.0 MB). Free memory was 102.0 MB in the beginning and 151.6 MB in the end (delta: -49.6 MB). Peak memory consumption was 144.4 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:11,957 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-19 06:49:11,959 INFO L168 Benchmark]: CACSL2BoogieTranslator took 494.42 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 101.6 MB in the beginning and 177.9 MB in the end (delta: -76.4 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:11,959 INFO L168 Benchmark]: Boogie Preprocessor took 97.67 ms. Allocated memory is still 202.9 MB. Free memory was 177.9 MB in the beginning and 174.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:11,960 INFO L168 Benchmark]: RCFGBuilder took 871.77 ms. Allocated memory is still 202.9 MB. Free memory was 174.9 MB in the beginning and 122.3 MB in the end (delta: 52.6 MB). Peak memory consumption was 52.6 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:11,962 INFO L168 Benchmark]: TraceAbstraction took 6378.33 ms. Allocated memory was 202.9 MB in the beginning and 333.4 MB in the end (delta: 130.5 MB). Free memory was 121.3 MB in the beginning and 151.6 MB in the end (delta: -30.2 MB). Peak memory consumption was 100.3 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:11,969 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 494.42 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 101.6 MB in the beginning and 177.9 MB in the end (delta: -76.4 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 97.67 ms. Allocated memory is still 202.9 MB. Free memory was 177.9 MB in the beginning and 174.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 871.77 ms. Allocated memory is still 202.9 MB. Free memory was 174.9 MB in the beginning and 122.3 MB in the end (delta: 52.6 MB). Peak memory consumption was 52.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6378.33 ms. Allocated memory was 202.9 MB in the beginning and 333.4 MB in the end (delta: 130.5 MB). Free memory was 121.3 MB in the beginning and 151.6 MB in the end (delta: -30.2 MB). Peak memory consumption was 100.3 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: 6.2s, OverallIterations: 18, TraceHistogramMax: 2, AutomataDifference: 3.5s, 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: 1.0s 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...