/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=DEEPEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:06:50,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:06:50,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:06:50,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:06:50,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:06:50,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:06:50,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:06:50,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:06:50,511 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:06:50,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:06:50,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:06:50,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:06:50,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:06:50,519 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:06:50,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:06:50,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:06:50,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:06:50,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:06:50,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:06:50,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:06:50,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:06:50,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:06:50,541 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:06:50,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:06:50,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 21:06:50,566 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:06:50,567 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:06:50,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:06:50,570 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 [2020-08-18 21:06:50,615 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:06:50,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:06:50,617 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:06:50,618 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:06:50,618 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:06:50,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:06:50,619 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:06:50,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:06:50,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:06:50,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:06:50,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:06:50,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:06:50,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:06:50,621 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:06:50,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:06:50,622 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:06:50,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:06:50,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:06:50,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:06:50,623 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:06:50,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:06:50,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:06:50,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:06:50,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:06:50,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:06:50,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:06:50,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:06:50,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:06:50,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:06:50,625 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=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:06:50,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:06:50,963 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:06:50,967 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:06:50,968 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:06:50,969 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:06:50,969 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-08-18 21:06:51,025 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56bf82cd6/3b3de34860a44d3f944a047a0b21da4f/FLAG868f6aadc [2020-08-18 21:06:51,484 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:06:51,485 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-08-18 21:06:51,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56bf82cd6/3b3de34860a44d3f944a047a0b21da4f/FLAG868f6aadc [2020-08-18 21:06:51,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56bf82cd6/3b3de34860a44d3f944a047a0b21da4f [2020-08-18 21:06:51,812 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:06:51,814 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:06:51,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:06:51,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:06:51,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:06:51,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:06:51" (1/1) ... [2020-08-18 21:06:51,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@590f663f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:51, skipping insertion in model container [2020-08-18 21:06:51,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:06:51" (1/1) ... [2020-08-18 21:06:51,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:06:51,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:06:52,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:06:52,168 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:06:52,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:06:52,345 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:06:52,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:52 WrapperNode [2020-08-18 21:06:52,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:06:52,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:06:52,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:06:52,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:06:52,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:52" (1/1) ... [2020-08-18 21:06:52,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:52" (1/1) ... [2020-08-18 21:06:52,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:52" (1/1) ... [2020-08-18 21:06:52,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:52" (1/1) ... [2020-08-18 21:06:52,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:52" (1/1) ... [2020-08-18 21:06:52,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:52" (1/1) ... [2020-08-18 21:06:52,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:52" (1/1) ... [2020-08-18 21:06:52,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:06:52,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:06:52,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:06:52,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:06:52,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:52" (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 [2020-08-18 21:06:52,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:06:52,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:06:52,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-18 21:06:52,476 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:06:52,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:06:52,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 21:06:52,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:06:52,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-18 21:06:52,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-08-18 21:06:52,477 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-18 21:06:52,477 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:06:52,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:06:52,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:06:52,693 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-18 21:06:53,282 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-18 21:06:53,283 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-18 21:06:53,295 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:06:53,295 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 21:06:53,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:06:53 BoogieIcfgContainer [2020-08-18 21:06:53,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:06:53,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:06:53,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:06:53,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:06:53,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:06:51" (1/3) ... [2020-08-18 21:06:53,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dfe9115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:06:53, skipping insertion in model container [2020-08-18 21:06:53,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:52" (2/3) ... [2020-08-18 21:06:53,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dfe9115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:06:53, skipping insertion in model container [2020-08-18 21:06:53,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:06:53" (3/3) ... [2020-08-18 21:06:53,310 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_12.cil.c [2020-08-18 21:06:53,321 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:06:53,330 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:06:53,345 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:06:53,369 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:06:53,369 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:06:53,370 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:06:53,370 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:06:53,370 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:06:53,370 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:06:53,370 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:06:53,370 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:06:53,392 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states. [2020-08-18 21:06:53,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 21:06:53,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:53,402 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] [2020-08-18 21:06:53,403 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:53,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:53,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1312867208, now seen corresponding path program 1 times [2020-08-18 21:06:53,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:53,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455069396] [2020-08-18 21:06:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:53,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:53,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455069396] [2020-08-18 21:06:53,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:53,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:06:53,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983069699] [2020-08-18 21:06:53,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:06:53,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:53,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:06:53,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:06:53,773 INFO L87 Difference]: Start difference. First operand 175 states. Second operand 5 states. [2020-08-18 21:06:54,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:54,156 INFO L93 Difference]: Finished difference Result 362 states and 623 transitions. [2020-08-18 21:06:54,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:06:54,158 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-18 21:06:54,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:54,175 INFO L225 Difference]: With dead ends: 362 [2020-08-18 21:06:54,175 INFO L226 Difference]: Without dead ends: 179 [2020-08-18 21:06:54,181 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 [2020-08-18 21:06:54,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-08-18 21:06:54,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-08-18 21:06:54,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-18 21:06:54,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 282 transitions. [2020-08-18 21:06:54,249 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 282 transitions. Word has length 33 [2020-08-18 21:06:54,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:54,249 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 282 transitions. [2020-08-18 21:06:54,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:06:54,250 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 282 transitions. [2020-08-18 21:06:54,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 21:06:54,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:54,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:54,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:06:54,252 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:54,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:54,253 INFO L82 PathProgramCache]: Analyzing trace with hash -564854069, now seen corresponding path program 1 times [2020-08-18 21:06:54,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:54,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478899256] [2020-08-18 21:06:54,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:54,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:54,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478899256] [2020-08-18 21:06:54,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:54,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:06:54,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934314265] [2020-08-18 21:06:54,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:06:54,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:54,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:06:54,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:06:54,381 INFO L87 Difference]: Start difference. First operand 177 states and 282 transitions. Second operand 5 states. [2020-08-18 21:06:54,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:54,615 INFO L93 Difference]: Finished difference Result 363 states and 580 transitions. [2020-08-18 21:06:54,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:06:54,616 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-18 21:06:54,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:54,618 INFO L225 Difference]: With dead ends: 363 [2020-08-18 21:06:54,618 INFO L226 Difference]: Without dead ends: 199 [2020-08-18 21:06:54,620 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 [2020-08-18 21:06:54,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-08-18 21:06:54,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2020-08-18 21:06:54,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-08-18 21:06:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 312 transitions. [2020-08-18 21:06:54,636 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 312 transitions. Word has length 34 [2020-08-18 21:06:54,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:54,636 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 312 transitions. [2020-08-18 21:06:54,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:06:54,637 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 312 transitions. [2020-08-18 21:06:54,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 21:06:54,638 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:54,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:54,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:06:54,639 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:54,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:54,639 INFO L82 PathProgramCache]: Analyzing trace with hash -2005409376, now seen corresponding path program 1 times [2020-08-18 21:06:54,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:54,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163309454] [2020-08-18 21:06:54,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:54,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:54,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163309454] [2020-08-18 21:06:54,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:54,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:06:54,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333942276] [2020-08-18 21:06:54,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:06:54,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:54,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:06:54,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:06:54,736 INFO L87 Difference]: Start difference. First operand 199 states and 312 transitions. Second operand 5 states. [2020-08-18 21:06:54,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:54,975 INFO L93 Difference]: Finished difference Result 393 states and 621 transitions. [2020-08-18 21:06:54,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:06:54,977 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-18 21:06:54,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:54,980 INFO L225 Difference]: With dead ends: 393 [2020-08-18 21:06:54,981 INFO L226 Difference]: Without dead ends: 207 [2020-08-18 21:06:54,985 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 [2020-08-18 21:06:54,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-08-18 21:06:55,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2020-08-18 21:06:55,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-08-18 21:06:55,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 323 transitions. [2020-08-18 21:06:55,015 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 323 transitions. Word has length 34 [2020-08-18 21:06:55,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:55,018 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 323 transitions. [2020-08-18 21:06:55,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:06:55,018 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 323 transitions. [2020-08-18 21:06:55,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 21:06:55,020 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:55,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:55,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:06:55,021 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:55,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:55,024 INFO L82 PathProgramCache]: Analyzing trace with hash 473070591, now seen corresponding path program 1 times [2020-08-18 21:06:55,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:55,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979207376] [2020-08-18 21:06:55,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:55,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:55,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979207376] [2020-08-18 21:06:55,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:55,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:06:55,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279432749] [2020-08-18 21:06:55,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:06:55,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:55,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:06:55,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:06:55,138 INFO L87 Difference]: Start difference. First operand 205 states and 323 transitions. Second operand 5 states. [2020-08-18 21:06:55,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:55,383 INFO L93 Difference]: Finished difference Result 398 states and 631 transitions. [2020-08-18 21:06:55,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:06:55,385 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-18 21:06:55,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:55,387 INFO L225 Difference]: With dead ends: 398 [2020-08-18 21:06:55,387 INFO L226 Difference]: Without dead ends: 206 [2020-08-18 21:06:55,388 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 [2020-08-18 21:06:55,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-18 21:06:55,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-08-18 21:06:55,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-18 21:06:55,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 324 transitions. [2020-08-18 21:06:55,412 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 324 transitions. Word has length 34 [2020-08-18 21:06:55,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:55,413 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 324 transitions. [2020-08-18 21:06:55,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:06:55,413 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 324 transitions. [2020-08-18 21:06:55,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-18 21:06:55,416 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:55,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:55,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:06:55,416 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:55,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:55,417 INFO L82 PathProgramCache]: Analyzing trace with hash 715486203, now seen corresponding path program 1 times [2020-08-18 21:06:55,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:55,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247983058] [2020-08-18 21:06:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:55,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:55,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247983058] [2020-08-18 21:06:55,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:55,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:06:55,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871158549] [2020-08-18 21:06:55,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:06:55,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:55,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:06:55,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:06:55,486 INFO L87 Difference]: Start difference. First operand 206 states and 324 transitions. Second operand 5 states. [2020-08-18 21:06:55,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:55,670 INFO L93 Difference]: Finished difference Result 409 states and 643 transitions. [2020-08-18 21:06:55,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:06:55,670 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-08-18 21:06:55,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:55,672 INFO L225 Difference]: With dead ends: 409 [2020-08-18 21:06:55,672 INFO L226 Difference]: Without dead ends: 216 [2020-08-18 21:06:55,673 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 [2020-08-18 21:06:55,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-18 21:06:55,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-08-18 21:06:55,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-18 21:06:55,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 322 transitions. [2020-08-18 21:06:55,684 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 322 transitions. Word has length 35 [2020-08-18 21:06:55,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:55,684 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 322 transitions. [2020-08-18 21:06:55,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:06:55,685 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 322 transitions. [2020-08-18 21:06:55,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-18 21:06:55,686 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:55,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:55,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:06:55,687 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:55,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:55,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1092720099, now seen corresponding path program 1 times [2020-08-18 21:06:55,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:55,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253619856] [2020-08-18 21:06:55,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:55,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:55,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253619856] [2020-08-18 21:06:55,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:55,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:06:55,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719865847] [2020-08-18 21:06:55,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:06:55,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:55,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:06:55,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:06:55,763 INFO L87 Difference]: Start difference. First operand 206 states and 322 transitions. Second operand 5 states. [2020-08-18 21:06:55,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:55,972 INFO L93 Difference]: Finished difference Result 409 states and 639 transitions. [2020-08-18 21:06:55,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:06:55,973 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-08-18 21:06:55,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:55,975 INFO L225 Difference]: With dead ends: 409 [2020-08-18 21:06:55,975 INFO L226 Difference]: Without dead ends: 216 [2020-08-18 21:06:55,976 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 [2020-08-18 21:06:55,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-18 21:06:55,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-08-18 21:06:55,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-18 21:06:55,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 320 transitions. [2020-08-18 21:06:55,997 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 320 transitions. Word has length 36 [2020-08-18 21:06:55,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:55,998 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 320 transitions. [2020-08-18 21:06:55,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:06:55,998 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 320 transitions. [2020-08-18 21:06:56,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 21:06:56,002 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:56,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:56,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:06:56,002 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:56,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:56,003 INFO L82 PathProgramCache]: Analyzing trace with hash 958823552, now seen corresponding path program 1 times [2020-08-18 21:06:56,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:56,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717294930] [2020-08-18 21:06:56,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:56,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:56,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:56,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717294930] [2020-08-18 21:06:56,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:56,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:06:56,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164785059] [2020-08-18 21:06:56,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:06:56,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:56,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:06:56,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:06:56,092 INFO L87 Difference]: Start difference. First operand 206 states and 320 transitions. Second operand 5 states. [2020-08-18 21:06:56,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:56,274 INFO L93 Difference]: Finished difference Result 409 states and 635 transitions. [2020-08-18 21:06:56,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:06:56,275 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-08-18 21:06:56,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:56,277 INFO L225 Difference]: With dead ends: 409 [2020-08-18 21:06:56,277 INFO L226 Difference]: Without dead ends: 216 [2020-08-18 21:06:56,279 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 [2020-08-18 21:06:56,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-18 21:06:56,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-08-18 21:06:56,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-18 21:06:56,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 318 transitions. [2020-08-18 21:06:56,293 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 318 transitions. Word has length 37 [2020-08-18 21:06:56,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:56,294 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 318 transitions. [2020-08-18 21:06:56,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:06:56,294 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 318 transitions. [2020-08-18 21:06:56,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 21:06:56,295 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:56,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:56,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:06:56,296 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:56,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:56,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1433612927, now seen corresponding path program 1 times [2020-08-18 21:06:56,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:56,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183891368] [2020-08-18 21:06:56,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:56,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:56,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183891368] [2020-08-18 21:06:56,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:56,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 21:06:56,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067178644] [2020-08-18 21:06:56,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:06:56,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:56,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:06:56,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:06:56,398 INFO L87 Difference]: Start difference. First operand 206 states and 318 transitions. Second operand 6 states. [2020-08-18 21:06:56,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:56,778 INFO L93 Difference]: Finished difference Result 605 states and 935 transitions. [2020-08-18 21:06:56,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 21:06:56,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-08-18 21:06:56,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:56,782 INFO L225 Difference]: With dead ends: 605 [2020-08-18 21:06:56,782 INFO L226 Difference]: Without dead ends: 412 [2020-08-18 21:06:56,784 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 [2020-08-18 21:06:56,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-08-18 21:06:56,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 388. [2020-08-18 21:06:56,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-08-18 21:06:56,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 600 transitions. [2020-08-18 21:06:56,809 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 600 transitions. Word has length 37 [2020-08-18 21:06:56,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:56,809 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 600 transitions. [2020-08-18 21:06:56,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:06:56,810 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 600 transitions. [2020-08-18 21:06:56,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 21:06:56,812 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:56,812 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:56,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:06:56,813 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:56,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:56,813 INFO L82 PathProgramCache]: Analyzing trace with hash 2018661528, now seen corresponding path program 1 times [2020-08-18 21:06:56,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:56,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832335330] [2020-08-18 21:06:56,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:56,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:56,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832335330] [2020-08-18 21:06:56,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:56,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:06:56,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110512931] [2020-08-18 21:06:56,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:06:56,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:56,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:06:56,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:06:56,896 INFO L87 Difference]: Start difference. First operand 388 states and 600 transitions. Second operand 5 states. [2020-08-18 21:06:57,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:57,153 INFO L93 Difference]: Finished difference Result 847 states and 1329 transitions. [2020-08-18 21:06:57,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:06:57,154 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-08-18 21:06:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:57,163 INFO L225 Difference]: With dead ends: 847 [2020-08-18 21:06:57,166 INFO L226 Difference]: Without dead ends: 472 [2020-08-18 21:06:57,168 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 [2020-08-18 21:06:57,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-18 21:06:57,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 454. [2020-08-18 21:06:57,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-08-18 21:06:57,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 715 transitions. [2020-08-18 21:06:57,207 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 715 transitions. Word has length 49 [2020-08-18 21:06:57,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:57,208 INFO L479 AbstractCegarLoop]: Abstraction has 454 states and 715 transitions. [2020-08-18 21:06:57,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:06:57,212 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 715 transitions. [2020-08-18 21:06:57,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-18 21:06:57,215 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:57,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:57,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:06:57,216 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:57,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:57,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1742182651, now seen corresponding path program 1 times [2020-08-18 21:06:57,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:57,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642675564] [2020-08-18 21:06:57,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:57,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642675564] [2020-08-18 21:06:57,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:57,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:06:57,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493236239] [2020-08-18 21:06:57,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:06:57,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:57,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:06:57,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:06:57,336 INFO L87 Difference]: Start difference. First operand 454 states and 715 transitions. Second operand 5 states. [2020-08-18 21:06:57,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:57,638 INFO L93 Difference]: Finished difference Result 936 states and 1487 transitions. [2020-08-18 21:06:57,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:06:57,639 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-08-18 21:06:57,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:57,643 INFO L225 Difference]: With dead ends: 936 [2020-08-18 21:06:57,644 INFO L226 Difference]: Without dead ends: 495 [2020-08-18 21:06:57,645 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 [2020-08-18 21:06:57,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-08-18 21:06:57,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 477. [2020-08-18 21:06:57,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-08-18 21:06:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 758 transitions. [2020-08-18 21:06:57,672 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 758 transitions. Word has length 50 [2020-08-18 21:06:57,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:57,673 INFO L479 AbstractCegarLoop]: Abstraction has 477 states and 758 transitions. [2020-08-18 21:06:57,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:06:57,673 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 758 transitions. [2020-08-18 21:06:57,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 21:06:57,674 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:57,675 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:57,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 21:06:57,675 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:57,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:57,676 INFO L82 PathProgramCache]: Analyzing trace with hash 928180771, now seen corresponding path program 1 times [2020-08-18 21:06:57,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:57,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986591671] [2020-08-18 21:06:57,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 21:06:57,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986591671] [2020-08-18 21:06:57,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:57,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:06:57,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371742110] [2020-08-18 21:06:57,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:06:57,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:57,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:06:57,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:06:57,754 INFO L87 Difference]: Start difference. First operand 477 states and 758 transitions. Second operand 5 states. [2020-08-18 21:06:57,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:57,983 INFO L93 Difference]: Finished difference Result 993 states and 1583 transitions. [2020-08-18 21:06:57,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:06:57,984 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2020-08-18 21:06:57,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:57,989 INFO L225 Difference]: With dead ends: 993 [2020-08-18 21:06:57,989 INFO L226 Difference]: Without dead ends: 529 [2020-08-18 21:06:57,991 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 [2020-08-18 21:06:57,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-08-18 21:06:58,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 511. [2020-08-18 21:06:58,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-08-18 21:06:58,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 809 transitions. [2020-08-18 21:06:58,018 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 809 transitions. Word has length 61 [2020-08-18 21:06:58,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:58,018 INFO L479 AbstractCegarLoop]: Abstraction has 511 states and 809 transitions. [2020-08-18 21:06:58,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:06:58,019 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 809 transitions. [2020-08-18 21:06:58,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 21:06:58,021 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:58,022 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:58,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 21:06:58,022 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:58,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:58,023 INFO L82 PathProgramCache]: Analyzing trace with hash 171040523, now seen corresponding path program 1 times [2020-08-18 21:06:58,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:58,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646468146] [2020-08-18 21:06:58,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:58,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 21:06:58,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646468146] [2020-08-18 21:06:58,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:58,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:06:58,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730891435] [2020-08-18 21:06:58,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:06:58,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:58,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:06:58,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:06:58,124 INFO L87 Difference]: Start difference. First operand 511 states and 809 transitions. Second operand 5 states. [2020-08-18 21:06:58,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:58,429 INFO L93 Difference]: Finished difference Result 1027 states and 1631 transitions. [2020-08-18 21:06:58,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:06:58,430 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-08-18 21:06:58,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:58,434 INFO L225 Difference]: With dead ends: 1027 [2020-08-18 21:06:58,435 INFO L226 Difference]: Without dead ends: 529 [2020-08-18 21:06:58,437 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 [2020-08-18 21:06:58,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-08-18 21:06:58,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 511. [2020-08-18 21:06:58,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-08-18 21:06:58,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 806 transitions. [2020-08-18 21:06:58,476 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 806 transitions. Word has length 62 [2020-08-18 21:06:58,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:58,477 INFO L479 AbstractCegarLoop]: Abstraction has 511 states and 806 transitions. [2020-08-18 21:06:58,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:06:58,478 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 806 transitions. [2020-08-18 21:06:58,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 21:06:58,480 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:58,480 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:58,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 21:06:58,481 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:58,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:58,482 INFO L82 PathProgramCache]: Analyzing trace with hash 2117537729, now seen corresponding path program 1 times [2020-08-18 21:06:58,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:58,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996032827] [2020-08-18 21:06:58,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:58,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:58,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 21:06:58,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996032827] [2020-08-18 21:06:58,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:58,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:06:58,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299971951] [2020-08-18 21:06:58,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:06:58,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:58,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:06:58,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:06:58,548 INFO L87 Difference]: Start difference. First operand 511 states and 806 transitions. Second operand 5 states. [2020-08-18 21:06:58,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:58,784 INFO L93 Difference]: Finished difference Result 1074 states and 1702 transitions. [2020-08-18 21:06:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:06:58,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-08-18 21:06:58,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:58,788 INFO L225 Difference]: With dead ends: 1074 [2020-08-18 21:06:58,788 INFO L226 Difference]: Without dead ends: 576 [2020-08-18 21:06:58,789 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 [2020-08-18 21:06:58,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2020-08-18 21:06:58,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 574. [2020-08-18 21:06:58,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 574 states. [2020-08-18 21:06:58,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 903 transitions. [2020-08-18 21:06:58,823 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 903 transitions. Word has length 62 [2020-08-18 21:06:58,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:58,824 INFO L479 AbstractCegarLoop]: Abstraction has 574 states and 903 transitions. [2020-08-18 21:06:58,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:06:58,824 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 903 transitions. [2020-08-18 21:06:58,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-18 21:06:58,829 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:58,829 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:58,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 21:06:58,830 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:58,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:58,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1816844012, now seen corresponding path program 1 times [2020-08-18 21:06:58,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:58,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131141364] [2020-08-18 21:06:58,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:58,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:58,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131141364] [2020-08-18 21:06:58,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:58,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:06:58,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879323124] [2020-08-18 21:06:58,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:06:58,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:58,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:06:58,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:06:58,926 INFO L87 Difference]: Start difference. First operand 574 states and 903 transitions. Second operand 5 states. [2020-08-18 21:06:59,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:59,171 INFO L93 Difference]: Finished difference Result 1184 states and 1864 transitions. [2020-08-18 21:06:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:06:59,172 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2020-08-18 21:06:59,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:59,176 INFO L225 Difference]: With dead ends: 1184 [2020-08-18 21:06:59,176 INFO L226 Difference]: Without dead ends: 623 [2020-08-18 21:06:59,178 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 [2020-08-18 21:06:59,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-08-18 21:06:59,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 617. [2020-08-18 21:06:59,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-08-18 21:06:59,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 967 transitions. [2020-08-18 21:06:59,215 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 967 transitions. Word has length 84 [2020-08-18 21:06:59,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:59,215 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 967 transitions. [2020-08-18 21:06:59,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:06:59,215 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 967 transitions. [2020-08-18 21:06:59,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-18 21:06:59,218 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:59,218 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:59,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 21:06:59,219 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:59,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:59,219 INFO L82 PathProgramCache]: Analyzing trace with hash -584276215, now seen corresponding path program 1 times [2020-08-18 21:06:59,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:59,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461712272] [2020-08-18 21:06:59,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:59,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:59,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461712272] [2020-08-18 21:06:59,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:59,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:06:59,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588360610] [2020-08-18 21:06:59,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:06:59,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:59,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:06:59,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:06:59,282 INFO L87 Difference]: Start difference. First operand 617 states and 967 transitions. Second operand 5 states. [2020-08-18 21:06:59,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:59,525 INFO L93 Difference]: Finished difference Result 1227 states and 1925 transitions. [2020-08-18 21:06:59,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:06:59,526 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-08-18 21:06:59,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:59,530 INFO L225 Difference]: With dead ends: 1227 [2020-08-18 21:06:59,530 INFO L226 Difference]: Without dead ends: 623 [2020-08-18 21:06:59,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:06:59,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-08-18 21:06:59,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 617. [2020-08-18 21:06:59,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-08-18 21:06:59,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 964 transitions. [2020-08-18 21:06:59,562 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 964 transitions. Word has length 85 [2020-08-18 21:06:59,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:59,562 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 964 transitions. [2020-08-18 21:06:59,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:06:59,562 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 964 transitions. [2020-08-18 21:06:59,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-18 21:06:59,564 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:59,564 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:59,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 21:06:59,565 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:59,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:59,565 INFO L82 PathProgramCache]: Analyzing trace with hash 220190302, now seen corresponding path program 1 times [2020-08-18 21:06:59,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:59,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269446331] [2020-08-18 21:06:59,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:59,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 21:06:59,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269446331] [2020-08-18 21:06:59,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:59,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:06:59,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690414493] [2020-08-18 21:06:59,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:06:59,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:59,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:06:59,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:06:59,613 INFO L87 Difference]: Start difference. First operand 617 states and 964 transitions. Second operand 5 states. [2020-08-18 21:06:59,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:59,879 INFO L93 Difference]: Finished difference Result 1223 states and 1913 transitions. [2020-08-18 21:06:59,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:06:59,880 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2020-08-18 21:06:59,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:59,883 INFO L225 Difference]: With dead ends: 1223 [2020-08-18 21:06:59,883 INFO L226 Difference]: Without dead ends: 619 [2020-08-18 21:06:59,885 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 [2020-08-18 21:06:59,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2020-08-18 21:06:59,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 617. [2020-08-18 21:06:59,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-08-18 21:06:59,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 959 transitions. [2020-08-18 21:06:59,915 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 959 transitions. Word has length 90 [2020-08-18 21:06:59,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:59,915 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 959 transitions. [2020-08-18 21:06:59,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:06:59,915 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 959 transitions. [2020-08-18 21:06:59,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-18 21:06:59,917 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:59,917 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:59,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 21:06:59,918 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:59,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:59,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1890073075, now seen corresponding path program 1 times [2020-08-18 21:06:59,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:59,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404544355] [2020-08-18 21:06:59,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:59,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:59,970 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-08-18 21:06:59,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404544355] [2020-08-18 21:06:59,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:59,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:06:59,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797206398] [2020-08-18 21:06:59,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:06:59,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:59,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:06:59,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:06:59,972 INFO L87 Difference]: Start difference. First operand 617 states and 959 transitions. Second operand 5 states. [2020-08-18 21:07:00,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:00,229 INFO L93 Difference]: Finished difference Result 1281 states and 1996 transitions. [2020-08-18 21:07:00,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:07:00,230 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-08-18 21:07:00,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:00,235 INFO L225 Difference]: With dead ends: 1281 [2020-08-18 21:07:00,236 INFO L226 Difference]: Without dead ends: 677 [2020-08-18 21:07:00,238 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 [2020-08-18 21:07:00,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2020-08-18 21:07:00,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 649. [2020-08-18 21:07:00,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-08-18 21:07:00,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1002 transitions. [2020-08-18 21:07:00,283 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1002 transitions. Word has length 98 [2020-08-18 21:07:00,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:00,283 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 1002 transitions. [2020-08-18 21:07:00,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:07:00,284 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1002 transitions. [2020-08-18 21:07:00,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-18 21:07:00,287 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:00,287 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:00,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 21:07:00,288 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:00,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:00,288 INFO L82 PathProgramCache]: Analyzing trace with hash -90077499, now seen corresponding path program 1 times [2020-08-18 21:07:00,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:00,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828796330] [2020-08-18 21:07:00,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,377 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-08-18 21:07:00,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828796330] [2020-08-18 21:07:00,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:00,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:07:00,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099296620] [2020-08-18 21:07:00,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:07:00,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:00,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:07:00,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:00,382 INFO L87 Difference]: Start difference. First operand 649 states and 1002 transitions. Second operand 5 states. [2020-08-18 21:07:00,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:00,679 INFO L93 Difference]: Finished difference Result 1313 states and 2033 transitions. [2020-08-18 21:07:00,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:07:00,680 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-08-18 21:07:00,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:00,684 INFO L225 Difference]: With dead ends: 1313 [2020-08-18 21:07:00,684 INFO L226 Difference]: Without dead ends: 677 [2020-08-18 21:07:00,686 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 [2020-08-18 21:07:00,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2020-08-18 21:07:00,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 649. [2020-08-18 21:07:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-08-18 21:07:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 996 transitions. [2020-08-18 21:07:00,732 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 996 transitions. Word has length 99 [2020-08-18 21:07:00,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:00,732 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 996 transitions. [2020-08-18 21:07:00,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:07:00,733 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 996 transitions. [2020-08-18 21:07:00,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-08-18 21:07:00,735 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:00,737 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:00,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 21:07:00,738 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:00,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:00,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1708621622, now seen corresponding path program 1 times [2020-08-18 21:07:00,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:00,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237925865] [2020-08-18 21:07:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 21:07:00,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237925865] [2020-08-18 21:07:00,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:00,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:07:00,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684916788] [2020-08-18 21:07:00,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:07:00,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:00,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:07:00,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:00,840 INFO L87 Difference]: Start difference. First operand 649 states and 996 transitions. Second operand 5 states. [2020-08-18 21:07:01,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:01,112 INFO L93 Difference]: Finished difference Result 1349 states and 2073 transitions. [2020-08-18 21:07:01,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:07:01,112 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2020-08-18 21:07:01,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:01,116 INFO L225 Difference]: With dead ends: 1349 [2020-08-18 21:07:01,116 INFO L226 Difference]: Without dead ends: 713 [2020-08-18 21:07:01,118 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 [2020-08-18 21:07:01,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-08-18 21:07:01,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 701. [2020-08-18 21:07:01,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 701 states. [2020-08-18 21:07:01,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1072 transitions. [2020-08-18 21:07:01,153 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1072 transitions. Word has length 105 [2020-08-18 21:07:01,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:01,154 INFO L479 AbstractCegarLoop]: Abstraction has 701 states and 1072 transitions. [2020-08-18 21:07:01,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:07:01,154 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1072 transitions. [2020-08-18 21:07:01,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-18 21:07:01,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:01,156 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:01,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 21:07:01,157 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:01,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:01,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2058755821, now seen corresponding path program 1 times [2020-08-18 21:07:01,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:01,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563555991] [2020-08-18 21:07:01,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 21:07:01,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563555991] [2020-08-18 21:07:01,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:01,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:07:01,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19626536] [2020-08-18 21:07:01,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:07:01,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:01,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:07:01,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:01,218 INFO L87 Difference]: Start difference. First operand 701 states and 1072 transitions. Second operand 5 states. [2020-08-18 21:07:01,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:01,556 INFO L93 Difference]: Finished difference Result 1406 states and 2155 transitions. [2020-08-18 21:07:01,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:07:01,557 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-08-18 21:07:01,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:01,561 INFO L225 Difference]: With dead ends: 1406 [2020-08-18 21:07:01,561 INFO L226 Difference]: Without dead ends: 714 [2020-08-18 21:07:01,564 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 [2020-08-18 21:07:01,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-18 21:07:01,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 702. [2020-08-18 21:07:01,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-08-18 21:07:01,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1073 transitions. [2020-08-18 21:07:01,614 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1073 transitions. Word has length 106 [2020-08-18 21:07:01,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:01,615 INFO L479 AbstractCegarLoop]: Abstraction has 702 states and 1073 transitions. [2020-08-18 21:07:01,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:07:01,615 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1073 transitions. [2020-08-18 21:07:01,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-08-18 21:07:01,618 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:01,618 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:01,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 21:07:01,619 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:01,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:01,619 INFO L82 PathProgramCache]: Analyzing trace with hash 646120304, now seen corresponding path program 1 times [2020-08-18 21:07:01,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:01,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858323306] [2020-08-18 21:07:01,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,708 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-08-18 21:07:01,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858323306] [2020-08-18 21:07:01,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:01,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:07:01,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818054930] [2020-08-18 21:07:01,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:07:01,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:01,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:07:01,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:01,713 INFO L87 Difference]: Start difference. First operand 702 states and 1073 transitions. Second operand 5 states. [2020-08-18 21:07:02,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:02,045 INFO L93 Difference]: Finished difference Result 1438 states and 2197 transitions. [2020-08-18 21:07:02,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:07:02,046 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-08-18 21:07:02,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:02,050 INFO L225 Difference]: With dead ends: 1438 [2020-08-18 21:07:02,050 INFO L226 Difference]: Without dead ends: 749 [2020-08-18 21:07:02,052 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 [2020-08-18 21:07:02,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-08-18 21:07:02,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 743. [2020-08-18 21:07:02,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-08-18 21:07:02,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1128 transitions. [2020-08-18 21:07:02,100 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1128 transitions. Word has length 117 [2020-08-18 21:07:02,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:02,101 INFO L479 AbstractCegarLoop]: Abstraction has 743 states and 1128 transitions. [2020-08-18 21:07:02,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:07:02,101 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1128 transitions. [2020-08-18 21:07:02,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-18 21:07:02,103 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:02,103 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:02,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 21:07:02,104 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:02,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:02,104 INFO L82 PathProgramCache]: Analyzing trace with hash 820078483, now seen corresponding path program 1 times [2020-08-18 21:07:02,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:02,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874550829] [2020-08-18 21:07:02,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-08-18 21:07:02,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874550829] [2020-08-18 21:07:02,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:02,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:07:02,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509432007] [2020-08-18 21:07:02,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:07:02,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:02,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:07:02,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:02,178 INFO L87 Difference]: Start difference. First operand 743 states and 1128 transitions. Second operand 5 states. [2020-08-18 21:07:02,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:02,424 INFO L93 Difference]: Finished difference Result 1479 states and 2247 transitions. [2020-08-18 21:07:02,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:07:02,426 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2020-08-18 21:07:02,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:02,430 INFO L225 Difference]: With dead ends: 1479 [2020-08-18 21:07:02,430 INFO L226 Difference]: Without dead ends: 749 [2020-08-18 21:07:02,432 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 [2020-08-18 21:07:02,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-08-18 21:07:02,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 743. [2020-08-18 21:07:02,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-08-18 21:07:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1123 transitions. [2020-08-18 21:07:02,473 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1123 transitions. Word has length 118 [2020-08-18 21:07:02,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:02,473 INFO L479 AbstractCegarLoop]: Abstraction has 743 states and 1123 transitions. [2020-08-18 21:07:02,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:07:02,473 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1123 transitions. [2020-08-18 21:07:02,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-08-18 21:07:02,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:02,476 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:02,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 21:07:02,476 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:02,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:02,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1832218007, now seen corresponding path program 1 times [2020-08-18 21:07:02,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:02,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108398077] [2020-08-18 21:07:02,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-08-18 21:07:02,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108398077] [2020-08-18 21:07:02,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:02,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:07:02,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541273099] [2020-08-18 21:07:02,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:07:02,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:02,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:07:02,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:02,534 INFO L87 Difference]: Start difference. First operand 743 states and 1123 transitions. Second operand 5 states. [2020-08-18 21:07:02,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:02,827 INFO L93 Difference]: Finished difference Result 1515 states and 2290 transitions. [2020-08-18 21:07:02,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:07:02,828 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-08-18 21:07:02,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:02,833 INFO L225 Difference]: With dead ends: 1515 [2020-08-18 21:07:02,833 INFO L226 Difference]: Without dead ends: 785 [2020-08-18 21:07:02,836 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 [2020-08-18 21:07:02,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-08-18 21:07:02,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 775. [2020-08-18 21:07:02,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-08-18 21:07:02,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1161 transitions. [2020-08-18 21:07:02,882 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1161 transitions. Word has length 120 [2020-08-18 21:07:02,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:02,882 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 1161 transitions. [2020-08-18 21:07:02,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:07:02,882 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1161 transitions. [2020-08-18 21:07:02,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 21:07:02,885 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:02,885 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:02,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 21:07:02,885 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:02,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:02,886 INFO L82 PathProgramCache]: Analyzing trace with hash 2144394689, now seen corresponding path program 1 times [2020-08-18 21:07:02,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:02,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216925451] [2020-08-18 21:07:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:02,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-08-18 21:07:02,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216925451] [2020-08-18 21:07:02,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:02,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:07:02,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915831177] [2020-08-18 21:07:02,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:07:02,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:02,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:07:02,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:02,957 INFO L87 Difference]: Start difference. First operand 775 states and 1161 transitions. Second operand 5 states. [2020-08-18 21:07:03,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:03,202 INFO L93 Difference]: Finished difference Result 1547 states and 2319 transitions. [2020-08-18 21:07:03,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:07:03,203 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2020-08-18 21:07:03,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:03,206 INFO L225 Difference]: With dead ends: 1547 [2020-08-18 21:07:03,207 INFO L226 Difference]: Without dead ends: 785 [2020-08-18 21:07:03,209 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 [2020-08-18 21:07:03,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-08-18 21:07:03,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 775. [2020-08-18 21:07:03,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-08-18 21:07:03,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1152 transitions. [2020-08-18 21:07:03,254 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1152 transitions. Word has length 121 [2020-08-18 21:07:03,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:03,254 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 1152 transitions. [2020-08-18 21:07:03,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:07:03,255 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1152 transitions. [2020-08-18 21:07:03,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-08-18 21:07:03,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:03,257 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:03,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 21:07:03,258 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:03,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:03,258 INFO L82 PathProgramCache]: Analyzing trace with hash -40343791, now seen corresponding path program 1 times [2020-08-18 21:07:03,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:03,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357405183] [2020-08-18 21:07:03,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:03,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:03,321 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-08-18 21:07:03,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357405183] [2020-08-18 21:07:03,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:03,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:07:03,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572970504] [2020-08-18 21:07:03,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:07:03,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:03,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:07:03,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:03,323 INFO L87 Difference]: Start difference. First operand 775 states and 1152 transitions. Second operand 5 states. [2020-08-18 21:07:03,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:03,570 INFO L93 Difference]: Finished difference Result 1573 states and 2340 transitions. [2020-08-18 21:07:03,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:07:03,571 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2020-08-18 21:07:03,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:03,575 INFO L225 Difference]: With dead ends: 1573 [2020-08-18 21:07:03,575 INFO L226 Difference]: Without dead ends: 811 [2020-08-18 21:07:03,577 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 [2020-08-18 21:07:03,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-08-18 21:07:03,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 803. [2020-08-18 21:07:03,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2020-08-18 21:07:03,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1183 transitions. [2020-08-18 21:07:03,618 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1183 transitions. Word has length 142 [2020-08-18 21:07:03,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:03,619 INFO L479 AbstractCegarLoop]: Abstraction has 803 states and 1183 transitions. [2020-08-18 21:07:03,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:07:03,619 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1183 transitions. [2020-08-18 21:07:03,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-18 21:07:03,622 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:03,622 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:03,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 21:07:03,622 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:03,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:03,625 INFO L82 PathProgramCache]: Analyzing trace with hash -46422775, now seen corresponding path program 1 times [2020-08-18 21:07:03,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:03,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955421671] [2020-08-18 21:07:03,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:03,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-08-18 21:07:03,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955421671] [2020-08-18 21:07:03,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:03,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:07:03,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912800640] [2020-08-18 21:07:03,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:07:03,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:03,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:07:03,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:03,700 INFO L87 Difference]: Start difference. First operand 803 states and 1183 transitions. Second operand 5 states. [2020-08-18 21:07:03,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:03,950 INFO L93 Difference]: Finished difference Result 1601 states and 2361 transitions. [2020-08-18 21:07:03,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:07:03,951 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2020-08-18 21:07:03,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:03,956 INFO L225 Difference]: With dead ends: 1601 [2020-08-18 21:07:03,957 INFO L226 Difference]: Without dead ends: 811 [2020-08-18 21:07:03,959 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 [2020-08-18 21:07:03,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-08-18 21:07:04,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 803. [2020-08-18 21:07:04,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2020-08-18 21:07:04,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1173 transitions. [2020-08-18 21:07:04,019 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1173 transitions. Word has length 143 [2020-08-18 21:07:04,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:04,020 INFO L479 AbstractCegarLoop]: Abstraction has 803 states and 1173 transitions. [2020-08-18 21:07:04,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:07:04,020 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1173 transitions. [2020-08-18 21:07:04,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-18 21:07:04,023 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:04,023 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:04,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 21:07:04,023 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:04,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:04,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1282567469, now seen corresponding path program 1 times [2020-08-18 21:07:04,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:04,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344158799] [2020-08-18 21:07:04,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:04,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:04,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-08-18 21:07:04,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344158799] [2020-08-18 21:07:04,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:04,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:07:04,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616156443] [2020-08-18 21:07:04,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:07:04,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:04,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:07:04,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:04,102 INFO L87 Difference]: Start difference. First operand 803 states and 1173 transitions. Second operand 5 states. [2020-08-18 21:07:04,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:04,347 INFO L93 Difference]: Finished difference Result 1656 states and 2415 transitions. [2020-08-18 21:07:04,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:07:04,347 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-08-18 21:07:04,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:04,352 INFO L225 Difference]: With dead ends: 1656 [2020-08-18 21:07:04,352 INFO L226 Difference]: Without dead ends: 866 [2020-08-18 21:07:04,354 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 [2020-08-18 21:07:04,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2020-08-18 21:07:04,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 852. [2020-08-18 21:07:04,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 852 states. [2020-08-18 21:07:04,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1234 transitions. [2020-08-18 21:07:04,414 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1234 transitions. Word has length 146 [2020-08-18 21:07:04,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:04,414 INFO L479 AbstractCegarLoop]: Abstraction has 852 states and 1234 transitions. [2020-08-18 21:07:04,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:07:04,414 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1234 transitions. [2020-08-18 21:07:04,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-18 21:07:04,417 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:04,417 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:04,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 21:07:04,418 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:04,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:04,418 INFO L82 PathProgramCache]: Analyzing trace with hash -399456400, now seen corresponding path program 1 times [2020-08-18 21:07:04,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:04,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526858931] [2020-08-18 21:07:04,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:04,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:04,510 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-08-18 21:07:04,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526858931] [2020-08-18 21:07:04,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:04,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:07:04,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379052332] [2020-08-18 21:07:04,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:07:04,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:04,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:07:04,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:04,512 INFO L87 Difference]: Start difference. First operand 852 states and 1234 transitions. Second operand 5 states. [2020-08-18 21:07:04,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:04,747 INFO L93 Difference]: Finished difference Result 1705 states and 2473 transitions. [2020-08-18 21:07:04,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:07:04,747 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-08-18 21:07:04,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:04,752 INFO L225 Difference]: With dead ends: 1705 [2020-08-18 21:07:04,752 INFO L226 Difference]: Without dead ends: 850 [2020-08-18 21:07:04,754 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 [2020-08-18 21:07:04,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2020-08-18 21:07:04,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 836. [2020-08-18 21:07:04,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2020-08-18 21:07:04,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1211 transitions. [2020-08-18 21:07:04,798 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1211 transitions. Word has length 147 [2020-08-18 21:07:04,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:04,799 INFO L479 AbstractCegarLoop]: Abstraction has 836 states and 1211 transitions. [2020-08-18 21:07:04,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:07:04,799 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1211 transitions. [2020-08-18 21:07:04,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-18 21:07:04,801 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:04,802 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:04,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 21:07:04,802 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:04,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:04,802 INFO L82 PathProgramCache]: Analyzing trace with hash 947927939, now seen corresponding path program 1 times [2020-08-18 21:07:04,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:04,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054668003] [2020-08-18 21:07:04,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:04,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-08-18 21:07:04,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054668003] [2020-08-18 21:07:04,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:04,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:07:04,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202568846] [2020-08-18 21:07:04,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:07:04,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:04,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:07:04,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:04,875 INFO L87 Difference]: Start difference. First operand 836 states and 1211 transitions. Second operand 5 states. [2020-08-18 21:07:05,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:05,131 INFO L93 Difference]: Finished difference Result 1671 states and 2423 transitions. [2020-08-18 21:07:05,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:07:05,132 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-08-18 21:07:05,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:05,137 INFO L225 Difference]: With dead ends: 1671 [2020-08-18 21:07:05,137 INFO L226 Difference]: Without dead ends: 848 [2020-08-18 21:07:05,139 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 [2020-08-18 21:07:05,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2020-08-18 21:07:05,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 836. [2020-08-18 21:07:05,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2020-08-18 21:07:05,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1204 transitions. [2020-08-18 21:07:05,183 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1204 transitions. Word has length 151 [2020-08-18 21:07:05,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:05,184 INFO L479 AbstractCegarLoop]: Abstraction has 836 states and 1204 transitions. [2020-08-18 21:07:05,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:07:05,184 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1204 transitions. [2020-08-18 21:07:05,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-18 21:07:05,186 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:05,186 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:05,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 21:07:05,187 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:05,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:05,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1674902650, now seen corresponding path program 1 times [2020-08-18 21:07:05,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:05,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021613076] [2020-08-18 21:07:05,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:05,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-08-18 21:07:05,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021613076] [2020-08-18 21:07:05,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:05,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:07:05,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219433988] [2020-08-18 21:07:05,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:07:05,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:05,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:07:05,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:05,288 INFO L87 Difference]: Start difference. First operand 836 states and 1204 transitions. Second operand 5 states. [2020-08-18 21:07:05,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:05,564 INFO L93 Difference]: Finished difference Result 1671 states and 2409 transitions. [2020-08-18 21:07:05,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:07:05,564 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-08-18 21:07:05,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:05,572 INFO L225 Difference]: With dead ends: 1671 [2020-08-18 21:07:05,572 INFO L226 Difference]: Without dead ends: 831 [2020-08-18 21:07:05,575 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 [2020-08-18 21:07:05,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2020-08-18 21:07:05,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 819. [2020-08-18 21:07:05,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 819 states. [2020-08-18 21:07:05,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1175 transitions. [2020-08-18 21:07:05,619 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1175 transitions. Word has length 152 [2020-08-18 21:07:05,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:05,620 INFO L479 AbstractCegarLoop]: Abstraction has 819 states and 1175 transitions. [2020-08-18 21:07:05,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:07:05,620 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1175 transitions. [2020-08-18 21:07:05,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-18 21:07:05,622 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:05,623 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:05,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 21:07:05,623 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:05,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:05,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1165219020, now seen corresponding path program 1 times [2020-08-18 21:07:05,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:05,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265880804] [2020-08-18 21:07:05,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:05,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-08-18 21:07:05,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265880804] [2020-08-18 21:07:05,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:05,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:05,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505977853] [2020-08-18 21:07:05,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:05,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:05,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:05,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:05,690 INFO L87 Difference]: Start difference. First operand 819 states and 1175 transitions. Second operand 3 states. [2020-08-18 21:07:05,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:05,772 INFO L93 Difference]: Finished difference Result 2417 states and 3465 transitions. [2020-08-18 21:07:05,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:05,773 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-08-18 21:07:05,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:05,780 INFO L225 Difference]: With dead ends: 2417 [2020-08-18 21:07:05,780 INFO L226 Difference]: Without dead ends: 1611 [2020-08-18 21:07:05,782 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 [2020-08-18 21:07:05,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2020-08-18 21:07:05,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 821. [2020-08-18 21:07:05,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2020-08-18 21:07:05,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1177 transitions. [2020-08-18 21:07:05,836 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1177 transitions. Word has length 159 [2020-08-18 21:07:05,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:05,836 INFO L479 AbstractCegarLoop]: Abstraction has 821 states and 1177 transitions. [2020-08-18 21:07:05,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:05,836 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1177 transitions. [2020-08-18 21:07:05,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-18 21:07:05,839 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:05,839 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:05,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 21:07:05,839 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:05,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:05,840 INFO L82 PathProgramCache]: Analyzing trace with hash 2119159178, now seen corresponding path program 1 times [2020-08-18 21:07:05,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:05,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555066092] [2020-08-18 21:07:05,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:05,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-08-18 21:07:05,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555066092] [2020-08-18 21:07:05,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:05,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:05,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634413590] [2020-08-18 21:07:05,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:05,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:05,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:05,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:05,927 INFO L87 Difference]: Start difference. First operand 821 states and 1177 transitions. Second operand 3 states. [2020-08-18 21:07:06,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:06,042 INFO L93 Difference]: Finished difference Result 2416 states and 3461 transitions. [2020-08-18 21:07:06,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:06,043 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-08-18 21:07:06,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:06,073 INFO L225 Difference]: With dead ends: 2416 [2020-08-18 21:07:06,073 INFO L226 Difference]: Without dead ends: 1608 [2020-08-18 21:07:06,076 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 [2020-08-18 21:07:06,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2020-08-18 21:07:06,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1606. [2020-08-18 21:07:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1606 states. [2020-08-18 21:07:06,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2297 transitions. [2020-08-18 21:07:06,182 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2297 transitions. Word has length 159 [2020-08-18 21:07:06,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:06,182 INFO L479 AbstractCegarLoop]: Abstraction has 1606 states and 2297 transitions. [2020-08-18 21:07:06,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:06,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2297 transitions. [2020-08-18 21:07:06,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-08-18 21:07:06,185 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:06,185 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:06,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-18 21:07:06,185 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:06,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:06,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1294690318, now seen corresponding path program 1 times [2020-08-18 21:07:06,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:06,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843124040] [2020-08-18 21:07:06,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:06,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:06,357 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-08-18 21:07:06,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843124040] [2020-08-18 21:07:06,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:06,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:06,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428467556] [2020-08-18 21:07:06,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:06,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:06,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:06,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:06,359 INFO L87 Difference]: Start difference. First operand 1606 states and 2297 transitions. Second operand 3 states. [2020-08-18 21:07:06,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:06,609 INFO L93 Difference]: Finished difference Result 4752 states and 6785 transitions. [2020-08-18 21:07:06,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:06,609 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2020-08-18 21:07:06,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:06,624 INFO L225 Difference]: With dead ends: 4752 [2020-08-18 21:07:06,624 INFO L226 Difference]: Without dead ends: 3159 [2020-08-18 21:07:06,630 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 [2020-08-18 21:07:06,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2020-08-18 21:07:06,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 1606. [2020-08-18 21:07:06,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1606 states. [2020-08-18 21:07:06,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2293 transitions. [2020-08-18 21:07:06,745 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2293 transitions. Word has length 161 [2020-08-18 21:07:06,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:06,745 INFO L479 AbstractCegarLoop]: Abstraction has 1606 states and 2293 transitions. [2020-08-18 21:07:06,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:06,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2293 transitions. [2020-08-18 21:07:06,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-08-18 21:07:06,748 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:06,748 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:06,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-18 21:07:06,748 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:06,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:06,749 INFO L82 PathProgramCache]: Analyzing trace with hash -179508653, now seen corresponding path program 1 times [2020-08-18 21:07:06,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:06,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701254961] [2020-08-18 21:07:06,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:06,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-18 21:07:06,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701254961] [2020-08-18 21:07:06,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:06,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:06,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208841728] [2020-08-18 21:07:06,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:06,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:06,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:06,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:06,883 INFO L87 Difference]: Start difference. First operand 1606 states and 2293 transitions. Second operand 3 states. [2020-08-18 21:07:07,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:07,261 INFO L93 Difference]: Finished difference Result 4792 states and 6845 transitions. [2020-08-18 21:07:07,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:07,262 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2020-08-18 21:07:07,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:07,277 INFO L225 Difference]: With dead ends: 4792 [2020-08-18 21:07:07,278 INFO L226 Difference]: Without dead ends: 3199 [2020-08-18 21:07:07,281 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 [2020-08-18 21:07:07,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3199 states. [2020-08-18 21:07:07,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3199 to 3197. [2020-08-18 21:07:07,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3197 states. [2020-08-18 21:07:07,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 4493 transitions. [2020-08-18 21:07:07,496 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 4493 transitions. Word has length 162 [2020-08-18 21:07:07,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:07,497 INFO L479 AbstractCegarLoop]: Abstraction has 3197 states and 4493 transitions. [2020-08-18 21:07:07,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:07,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 4493 transitions. [2020-08-18 21:07:07,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-08-18 21:07:07,500 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:07,501 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:07,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-18 21:07:07,501 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:07,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:07,501 INFO L82 PathProgramCache]: Analyzing trace with hash 774431505, now seen corresponding path program 1 times [2020-08-18 21:07:07,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:07,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431430506] [2020-08-18 21:07:07,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 21:07:07,540 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 21:07:07,540 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 21:07:07,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-18 21:07:07,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:07:07 BoogieIcfgContainer [2020-08-18 21:07:07,601 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:07:07,604 INFO L168 Benchmark]: Toolchain (without parser) took 15789.40 ms. Allocated memory was 149.9 MB in the beginning and 487.1 MB in the end (delta: 337.1 MB). Free memory was 103.9 MB in the beginning and 207.4 MB in the end (delta: -103.5 MB). Peak memory consumption was 233.6 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:07,604 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 149.9 MB. Free memory was 123.2 MB in the beginning and 123.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 21:07:07,605 INFO L168 Benchmark]: CACSL2BoogieTranslator took 531.85 ms. Allocated memory was 149.9 MB in the beginning and 206.6 MB in the end (delta: 56.6 MB). Free memory was 103.7 MB in the beginning and 181.0 MB in the end (delta: -77.4 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:07,605 INFO L168 Benchmark]: Boogie Preprocessor took 63.30 ms. Allocated memory is still 206.6 MB. Free memory was 181.0 MB in the beginning and 178.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:07,606 INFO L168 Benchmark]: RCFGBuilder took 890.75 ms. Allocated memory is still 206.6 MB. Free memory was 178.5 MB in the beginning and 120.5 MB in the end (delta: 58.0 MB). Peak memory consumption was 58.0 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:07,606 INFO L168 Benchmark]: TraceAbstraction took 14298.78 ms. Allocated memory was 206.6 MB in the beginning and 487.1 MB in the end (delta: 280.5 MB). Free memory was 119.9 MB in the beginning and 207.4 MB in the end (delta: -87.5 MB). Peak memory consumption was 193.0 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:07,608 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 149.9 MB. Free memory was 123.2 MB in the beginning and 123.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 531.85 ms. Allocated memory was 149.9 MB in the beginning and 206.6 MB in the end (delta: 56.6 MB). Free memory was 103.7 MB in the beginning and 181.0 MB in the end (delta: -77.4 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 63.30 ms. Allocated memory is still 206.6 MB. Free memory was 181.0 MB in the beginning and 178.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 890.75 ms. Allocated memory is still 206.6 MB. Free memory was 178.5 MB in the beginning and 120.5 MB in the end (delta: 58.0 MB). Peak memory consumption was 58.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14298.78 ms. Allocated memory was 206.6 MB in the beginning and 487.1 MB in the end (delta: 280.5 MB). Free memory was 119.9 MB in the beginning and 207.4 MB in the end (delta: -87.5 MB). Peak memory consumption was 193.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 697]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L702] int s ; [L703] int tmp ; [L707] s = 8464 [L708] CALL ssl3_accept(s) [L12] int s__info_callback = __VERIFIER_nondet_int() ; [L13] int s__in_handshake = __VERIFIER_nondet_int() ; [L14] int s__state ; [L15] int s__new_session ; [L16] int s__server ; [L17] int s__version = __VERIFIER_nondet_int() ; [L18] int s__type ; [L19] int s__init_num ; [L20] int s__hit = __VERIFIER_nondet_int() ; [L21] int s__rwstate ; [L22] int s__init_buf___0 = 1; [L23] int s__debug = __VERIFIER_nondet_int() ; [L24] int s__shutdown ; [L25] int s__cert = __VERIFIER_nondet_int() ; [L26] int s__options = __VERIFIER_nondet_int() ; [L27] int s__verify_mode = __VERIFIER_nondet_int() ; [L28] int s__session__peer = __VERIFIER_nondet_int() ; [L29] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L30] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L31] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L32] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L33] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L34] int s__s3__tmp__cert_request ; [L35] int s__s3__tmp__reuse_message ; [L36] int s__s3__tmp__use_rsa_tmp ; [L37] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L38] int s__s3__tmp__new_cipher__algorithms ; [L39] int s__s3__tmp__next_state___0 ; [L40] int s__s3__tmp__new_cipher__algo_strength ; [L41] int s__session__cipher ; [L42] int buf ; [L43] unsigned long l ; [L44] unsigned long Time ; [L45] unsigned long tmp ; [L46] int cb ; [L47] long num1 = __VERIFIER_nondet_long() ; [L48] int ret ; [L49] int new_state ; [L50] int state ; [L51] int skip ; [L52] int got_new_session ; [L53] int tmp___1 = __VERIFIER_nondet_int() ; [L54] int tmp___2 = __VERIFIER_nondet_int() ; [L55] int tmp___3 = __VERIFIER_nondet_int() ; [L56] int tmp___4 = __VERIFIER_nondet_int() ; [L57] int tmp___5 = __VERIFIER_nondet_int() ; [L58] int tmp___6 = __VERIFIER_nondet_int() ; [L59] int tmp___7 ; [L60] long tmp___8 = __VERIFIER_nondet_long() ; [L61] int tmp___9 = __VERIFIER_nondet_int() ; [L62] int tmp___10 = __VERIFIER_nondet_int() ; [L63] int blastFlag ; [L64] int __cil_tmp55 ; [L65] unsigned long __cil_tmp56 ; [L66] unsigned long __cil_tmp57 ; [L67] unsigned long __cil_tmp58 ; [L68] unsigned long __cil_tmp59 ; [L69] int __cil_tmp60 ; [L70] unsigned long __cil_tmp61 = __VERIFIER_nondet_ulong() ; [L74] s__state = initial_state [L75] blastFlag = 0 [L76] tmp = __VERIFIER_nondet_int() [L77] Time = tmp [L78] cb = 0 [L79] ret = -1 [L80] skip = 0 [L81] got_new_session = 0 [L82] COND TRUE s__info_callback != 0 [L83] cb = s__info_callback [L89] s__in_handshake ++ [L90] COND FALSE !(tmp___1 + 12288) [L95] COND FALSE !(s__cert == 0) [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND TRUE s__state == 8464 [L272] s__shutdown = 0 [L273] ret = __VERIFIER_nondet_int() [L274] COND TRUE blastFlag == 0 [L275] blastFlag = 1 [L277] COND FALSE !(ret <= 0) [L280] got_new_session = 1 [L281] s__state = 8496 [L282] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND TRUE s__state == 8496 [L286] ret = __VERIFIER_nondet_int() [L287] COND TRUE blastFlag == 1 [L288] blastFlag = 2 [L290] COND FALSE !(ret <= 0) [L293] COND FALSE !(\read(s__hit)) [L296] s__state = 8512 [L298] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND TRUE s__state == 8512 [L303] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L304] __cil_tmp56 = (unsigned long )s__s3__tmp__new_cipher__algorithms [L305] COND TRUE __cil_tmp56 + 256UL [L306] __cil_tmp56 = 256345 [L307] skip = 1 [L318] s__state = 8528 [L319] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND FALSE !(s__state == 8512) [L144] COND FALSE !(s__state == 8513) [L147] COND TRUE s__state == 8528 [L323] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L324] l = (unsigned long )s__s3__tmp__new_cipher__algorithms [L326] __cil_tmp57 = (unsigned long )s__options [L327] COND TRUE __cil_tmp57 + 2097152UL [L328] s__s3__tmp__use_rsa_tmp = 1 [L333] COND TRUE \read(s__s3__tmp__use_rsa_tmp) [L361] ret = __VERIFIER_nondet_int() [L362] COND FALSE !(blastFlag == 3) [L365] COND FALSE !(ret <= 0) [L382] s__state = 8544 [L383] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND FALSE !(s__state == 8512) [L144] COND FALSE !(s__state == 8513) [L147] COND FALSE !(s__state == 8528) [L150] COND FALSE !(s__state == 8529) [L153] COND TRUE s__state == 8544 [L387] COND TRUE s__verify_mode + 1 [L388] COND TRUE s__session__peer != 0 [L389] COND TRUE s__verify_mode + 4 [L390] s__verify_mode = 123 [L391] skip = 1 [L392] s__s3__tmp__cert_request = 0 [L393] s__state = 8560 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND FALSE !(s__state == 8512) [L144] COND FALSE !(s__state == 8513) [L147] COND FALSE !(s__state == 8528) [L150] COND FALSE !(s__state == 8529) [L153] COND FALSE !(s__state == 8544) [L156] COND FALSE !(s__state == 8545) [L159] COND TRUE s__state == 8560 [L437] ret = __VERIFIER_nondet_int() [L438] COND FALSE !(ret <= 0) [L441] s__s3__tmp__next_state___0 = 8576 [L442] s__state = 8448 [L443] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND TRUE ! s__s3__tmp__reuse_message [L653] COND TRUE ! skip [L654] COND TRUE state == 8560 [L655] COND TRUE s__state == 8448 [L656] COND TRUE s__verify_mode != -1 [L657] COND TRUE s__verify_mode != -2 [L658] COND TRUE __cil_tmp61 != 9021 [L659] COND TRUE __cil_tmp58 != 4294967294 [L660] COND TRUE blastFlag != 4 [L661] COND TRUE tmp___7 != 1024 [L697] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 175 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.1s, OverallIterations: 35, TraceHistogramMax: 6, AutomataDifference: 9.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7259 SDtfs, 16112 SDslu, 7753 SDs, 0 SdLazy, 4949 SolverSat, 1408 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 263 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3197occurred in iteration=34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 34 MinimizatonAttempts, 2673 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 3391 NumberOfCodeBlocks, 3391 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 3195 ConstructedInterpolants, 0 QuantifiedInterpolants, 632376 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 34 InterpolantComputations, 34 PerfectInterpolantSequences, 2752/2752 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...