/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=LOWLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_13.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:41:50,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:41:50,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:41:50,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:41:50,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:41:50,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:41:50,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:41:50,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:41:50,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:41:50,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:41:50,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:41:50,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:41:50,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:41:50,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:41:50,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:41:50,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:41:50,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:41:50,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:41:50,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:41:50,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:41:50,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:41:50,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:41:50,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:41:50,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:41:50,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:41:50,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:41:50,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:41:50,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:41:50,613 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 18:41:50,647 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:41:50,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:41:50,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:41:50,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:41:50,653 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:41:50,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:41:50,653 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:41:50,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:41:50,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:41:50,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:41:50,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:41:50,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:41:50,655 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:41:50,655 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:41:50,655 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:41:50,655 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:41:50,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:41:50,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:41:50,656 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:41:50,656 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:41:50,656 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:41:50,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:41:50,657 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:41:50,657 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:41:50,657 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:41:50,657 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:41:50,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:41:50,658 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:41:50,658 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:41:50,658 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=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:41:50,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:41:51,000 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:41:51,003 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:41:51,005 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:41:51,005 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:41:51,006 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_13.cil.c [2020-08-18 18:41:51,075 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f81f8576b/2f83225cc806477f843aa3aa4c03e0e5/FLAG7c7a605b3 [2020-08-18 18:41:51,603 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:41:51,611 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_13.cil.c [2020-08-18 18:41:51,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f81f8576b/2f83225cc806477f843aa3aa4c03e0e5/FLAG7c7a605b3 [2020-08-18 18:41:51,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f81f8576b/2f83225cc806477f843aa3aa4c03e0e5 [2020-08-18 18:41:51,931 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:41:51,934 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:41:51,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:41:51,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:41:51,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:41:51,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:41:51" (1/1) ... [2020-08-18 18:41:51,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d80459b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:51, skipping insertion in model container [2020-08-18 18:41:51,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:41:51" (1/1) ... [2020-08-18 18:41:51,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:41:52,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:41:52,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:41:52,292 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:41:52,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:41:52,502 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:41:52,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:52 WrapperNode [2020-08-18 18:41:52,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:41:52,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:41:52,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:41:52,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:41:52,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:52" (1/1) ... [2020-08-18 18:41:52,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:52" (1/1) ... [2020-08-18 18:41:52,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:52" (1/1) ... [2020-08-18 18:41:52,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:52" (1/1) ... [2020-08-18 18:41:52,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:52" (1/1) ... [2020-08-18 18:41:52,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:52" (1/1) ... [2020-08-18 18:41:52,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:52" (1/1) ... [2020-08-18 18:41:52,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:41:52,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:41:52,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:41:52,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:41:52,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:52" (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 18:41:52,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:41:52,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:41:52,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-18 18:41:52,636 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:41:52,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:41:52,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 18:41:52,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 18:41:52,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-18 18:41:52,637 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-18 18:41:52,637 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:41:52,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:41:52,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:41:52,924 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-18 18:41:53,452 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-18 18:41:53,453 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-18 18:41:53,465 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:41:53,465 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 18:41:53,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:41:53 BoogieIcfgContainer [2020-08-18 18:41:53,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:41:53,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:41:53,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:41:53,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:41:53,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:41:51" (1/3) ... [2020-08-18 18:41:53,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749878e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:41:53, skipping insertion in model container [2020-08-18 18:41:53,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:52" (2/3) ... [2020-08-18 18:41:53,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749878e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:41:53, skipping insertion in model container [2020-08-18 18:41:53,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:41:53" (3/3) ... [2020-08-18 18:41:53,481 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_13.cil.c [2020-08-18 18:41:53,493 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:41:53,501 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:41:53,515 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:41:53,546 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:41:53,547 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:41:53,547 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:41:53,547 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:41:53,547 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:41:53,547 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:41:53,548 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:41:53,548 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:41:53,573 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states. [2020-08-18 18:41:53,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 18:41:53,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:53,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:53,584 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:53,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:53,591 INFO L82 PathProgramCache]: Analyzing trace with hash 317102767, now seen corresponding path program 1 times [2020-08-18 18:41:53,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:53,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089811617] [2020-08-18 18:41:53,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:53,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:53,958 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 18:41:53,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089811617] [2020-08-18 18:41:53,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:53,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:41:53,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255757851] [2020-08-18 18:41:53,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:41:53,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:53,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:41:53,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:41:53,987 INFO L87 Difference]: Start difference. First operand 161 states. Second operand 5 states. [2020-08-18 18:41:54,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:54,597 INFO L93 Difference]: Finished difference Result 376 states and 647 transitions. [2020-08-18 18:41:54,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:41:54,599 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-08-18 18:41:54,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:54,628 INFO L225 Difference]: With dead ends: 376 [2020-08-18 18:41:54,629 INFO L226 Difference]: Without dead ends: 193 [2020-08-18 18:41:54,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:41:54,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-08-18 18:41:54,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2020-08-18 18:41:54,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-08-18 18:41:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 279 transitions. [2020-08-18 18:41:54,704 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 279 transitions. Word has length 31 [2020-08-18 18:41:54,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:54,705 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 279 transitions. [2020-08-18 18:41:54,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:41:54,705 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 279 transitions. [2020-08-18 18:41:54,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-18 18:41:54,707 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:54,707 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 18:41:54,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:41:54,708 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:54,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:54,709 INFO L82 PathProgramCache]: Analyzing trace with hash 115186168, now seen corresponding path program 1 times [2020-08-18 18:41:54,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:54,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12056480] [2020-08-18 18:41:54,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:54,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:54,830 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 18:41:54,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12056480] [2020-08-18 18:41:54,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:54,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 18:41:54,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439752783] [2020-08-18 18:41:54,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:41:54,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:54,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:41:54,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:41:54,834 INFO L87 Difference]: Start difference. First operand 189 states and 279 transitions. Second operand 6 states. [2020-08-18 18:41:55,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:55,209 INFO L93 Difference]: Finished difference Result 444 states and 670 transitions. [2020-08-18 18:41:55,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 18:41:55,210 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-08-18 18:41:55,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:55,217 INFO L225 Difference]: With dead ends: 444 [2020-08-18 18:41:55,217 INFO L226 Difference]: Without dead ends: 256 [2020-08-18 18:41:55,222 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 18:41:55,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-08-18 18:41:55,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 217. [2020-08-18 18:41:55,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-08-18 18:41:55,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 318 transitions. [2020-08-18 18:41:55,265 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 318 transitions. Word has length 35 [2020-08-18 18:41:55,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:55,268 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 318 transitions. [2020-08-18 18:41:55,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:41:55,268 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 318 transitions. [2020-08-18 18:41:55,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 18:41:55,272 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:55,277 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 18:41:55,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:41:55,278 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:55,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:55,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1717181183, now seen corresponding path program 1 times [2020-08-18 18:41:55,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:55,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791103232] [2020-08-18 18:41:55,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:55,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:41:55,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791103232] [2020-08-18 18:41:55,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:55,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:41:55,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462153661] [2020-08-18 18:41:55,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:41:55,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:55,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:41:55,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:41:55,353 INFO L87 Difference]: Start difference. First operand 217 states and 318 transitions. Second operand 3 states. [2020-08-18 18:41:55,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:55,591 INFO L93 Difference]: Finished difference Result 505 states and 753 transitions. [2020-08-18 18:41:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:41:55,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2020-08-18 18:41:55,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:55,596 INFO L225 Difference]: With dead ends: 505 [2020-08-18 18:41:55,596 INFO L226 Difference]: Without dead ends: 289 [2020-08-18 18:41:55,599 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 18:41:55,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-08-18 18:41:55,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 259. [2020-08-18 18:41:55,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-08-18 18:41:55,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 380 transitions. [2020-08-18 18:41:55,643 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 380 transitions. Word has length 49 [2020-08-18 18:41:55,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:55,643 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 380 transitions. [2020-08-18 18:41:55,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:41:55,644 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 380 transitions. [2020-08-18 18:41:55,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 18:41:55,651 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:55,651 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:55,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:41:55,655 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:55,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:55,655 INFO L82 PathProgramCache]: Analyzing trace with hash -544977436, now seen corresponding path program 1 times [2020-08-18 18:41:55,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:55,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115007703] [2020-08-18 18:41:55,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:55,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:41:55,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115007703] [2020-08-18 18:41:55,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:41:55,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-18 18:41:55,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834930259] [2020-08-18 18:41:55,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:41:55,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:55,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:41:55,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:41:55,758 INFO L87 Difference]: Start difference. First operand 259 states and 380 transitions. Second operand 4 states. [2020-08-18 18:41:55,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:55,998 INFO L93 Difference]: Finished difference Result 665 states and 981 transitions. [2020-08-18 18:41:55,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:41:55,999 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-08-18 18:41:55,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:56,001 INFO L225 Difference]: With dead ends: 665 [2020-08-18 18:41:56,002 INFO L226 Difference]: Without dead ends: 407 [2020-08-18 18:41:56,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:41:56,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-08-18 18:41:56,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 285. [2020-08-18 18:41:56,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-08-18 18:41:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 417 transitions. [2020-08-18 18:41:56,023 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 417 transitions. Word has length 57 [2020-08-18 18:41:56,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:56,024 INFO L479 AbstractCegarLoop]: Abstraction has 285 states and 417 transitions. [2020-08-18 18:41:56,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:41:56,024 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 417 transitions. [2020-08-18 18:41:56,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 18:41:56,026 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:56,026 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:56,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:41:56,027 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:56,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:56,027 INFO L82 PathProgramCache]: Analyzing trace with hash 410586329, now seen corresponding path program 1 times [2020-08-18 18:41:56,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:56,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838202827] [2020-08-18 18:41:56,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:56,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-18 18:41:56,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838202827] [2020-08-18 18:41:56,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:56,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:41:56,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552930152] [2020-08-18 18:41:56,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:41:56,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:56,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:41:56,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:41:56,119 INFO L87 Difference]: Start difference. First operand 285 states and 417 transitions. Second operand 5 states. [2020-08-18 18:41:56,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:56,286 INFO L93 Difference]: Finished difference Result 588 states and 861 transitions. [2020-08-18 18:41:56,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:41:56,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-08-18 18:41:56,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:56,289 INFO L225 Difference]: With dead ends: 588 [2020-08-18 18:41:56,289 INFO L226 Difference]: Without dead ends: 316 [2020-08-18 18:41:56,291 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 18:41:56,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-08-18 18:41:56,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 310. [2020-08-18 18:41:56,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-08-18 18:41:56,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 450 transitions. [2020-08-18 18:41:56,304 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 450 transitions. Word has length 67 [2020-08-18 18:41:56,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:56,304 INFO L479 AbstractCegarLoop]: Abstraction has 310 states and 450 transitions. [2020-08-18 18:41:56,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:41:56,304 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 450 transitions. [2020-08-18 18:41:56,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-18 18:41:56,306 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:56,306 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:56,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:41:56,307 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:56,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:56,307 INFO L82 PathProgramCache]: Analyzing trace with hash -206772919, now seen corresponding path program 1 times [2020-08-18 18:41:56,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:56,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841149413] [2020-08-18 18:41:56,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:56,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:56,425 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-18 18:41:56,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841149413] [2020-08-18 18:41:56,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:56,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:41:56,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715075445] [2020-08-18 18:41:56,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:41:56,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:56,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:41:56,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:41:56,434 INFO L87 Difference]: Start difference. First operand 310 states and 450 transitions. Second operand 3 states. [2020-08-18 18:41:56,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:56,660 INFO L93 Difference]: Finished difference Result 689 states and 1019 transitions. [2020-08-18 18:41:56,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:41:56,661 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-08-18 18:41:56,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:56,664 INFO L225 Difference]: With dead ends: 689 [2020-08-18 18:41:56,664 INFO L226 Difference]: Without dead ends: 367 [2020-08-18 18:41:56,665 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 18:41:56,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-08-18 18:41:56,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 362. [2020-08-18 18:41:56,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-08-18 18:41:56,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 515 transitions. [2020-08-18 18:41:56,679 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 515 transitions. Word has length 77 [2020-08-18 18:41:56,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:56,680 INFO L479 AbstractCegarLoop]: Abstraction has 362 states and 515 transitions. [2020-08-18 18:41:56,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:41:56,680 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 515 transitions. [2020-08-18 18:41:56,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-18 18:41:56,682 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:56,682 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:56,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:41:56,683 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:56,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:56,683 INFO L82 PathProgramCache]: Analyzing trace with hash 67986695, now seen corresponding path program 1 times [2020-08-18 18:41:56,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:56,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929513773] [2020-08-18 18:41:56,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:56,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-18 18:41:56,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929513773] [2020-08-18 18:41:56,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:56,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:41:56,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276160330] [2020-08-18 18:41:56,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:41:56,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:56,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:41:56,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:41:56,735 INFO L87 Difference]: Start difference. First operand 362 states and 515 transitions. Second operand 3 states. [2020-08-18 18:41:56,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:56,893 INFO L93 Difference]: Finished difference Result 767 states and 1106 transitions. [2020-08-18 18:41:56,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:41:56,894 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-08-18 18:41:56,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:56,897 INFO L225 Difference]: With dead ends: 767 [2020-08-18 18:41:56,898 INFO L226 Difference]: Without dead ends: 401 [2020-08-18 18:41:56,899 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 18:41:56,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-08-18 18:41:56,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 396. [2020-08-18 18:41:56,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2020-08-18 18:41:56,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 559 transitions. [2020-08-18 18:41:56,916 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 559 transitions. Word has length 77 [2020-08-18 18:41:56,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:56,916 INFO L479 AbstractCegarLoop]: Abstraction has 396 states and 559 transitions. [2020-08-18 18:41:56,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:41:56,917 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 559 transitions. [2020-08-18 18:41:56,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 18:41:56,918 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:56,918 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:56,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:41:56,919 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:56,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:56,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1023176064, now seen corresponding path program 1 times [2020-08-18 18:41:56,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:56,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988961111] [2020-08-18 18:41:56,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:56,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-08-18 18:41:56,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988961111] [2020-08-18 18:41:56,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:56,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:41:56,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875978725] [2020-08-18 18:41:56,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:41:56,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:56,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:41:56,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:41:56,969 INFO L87 Difference]: Start difference. First operand 396 states and 559 transitions. Second operand 3 states. [2020-08-18 18:41:56,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:56,999 INFO L93 Difference]: Finished difference Result 785 states and 1109 transitions. [2020-08-18 18:41:57,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:41:57,000 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-08-18 18:41:57,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:57,003 INFO L225 Difference]: With dead ends: 785 [2020-08-18 18:41:57,003 INFO L226 Difference]: Without dead ends: 402 [2020-08-18 18:41:57,004 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 18:41:57,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-08-18 18:41:57,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 401. [2020-08-18 18:41:57,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-08-18 18:41:57,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 565 transitions. [2020-08-18 18:41:57,032 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 565 transitions. Word has length 79 [2020-08-18 18:41:57,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:57,033 INFO L479 AbstractCegarLoop]: Abstraction has 401 states and 565 transitions. [2020-08-18 18:41:57,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:41:57,033 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 565 transitions. [2020-08-18 18:41:57,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-18 18:41:57,034 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:57,035 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:57,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:41:57,035 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:57,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:57,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1094958026, now seen corresponding path program 1 times [2020-08-18 18:41:57,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:57,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575052055] [2020-08-18 18:41:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:57,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-18 18:41:57,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575052055] [2020-08-18 18:41:57,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:41:57,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-18 18:41:57,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729754328] [2020-08-18 18:41:57,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:41:57,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:57,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:41:57,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:41:57,119 INFO L87 Difference]: Start difference. First operand 401 states and 565 transitions. Second operand 4 states. [2020-08-18 18:41:57,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:57,336 INFO L93 Difference]: Finished difference Result 988 states and 1401 transitions. [2020-08-18 18:41:57,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:41:57,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-08-18 18:41:57,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:57,341 INFO L225 Difference]: With dead ends: 988 [2020-08-18 18:41:57,341 INFO L226 Difference]: Without dead ends: 555 [2020-08-18 18:41:57,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:41:57,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-08-18 18:41:57,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 451. [2020-08-18 18:41:57,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-08-18 18:41:57,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 638 transitions. [2020-08-18 18:41:57,360 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 638 transitions. Word has length 81 [2020-08-18 18:41:57,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:57,360 INFO L479 AbstractCegarLoop]: Abstraction has 451 states and 638 transitions. [2020-08-18 18:41:57,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:41:57,361 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 638 transitions. [2020-08-18 18:41:57,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-18 18:41:57,362 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:57,362 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 18:41:57,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 18:41:57,363 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:57,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:57,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1152174724, now seen corresponding path program 1 times [2020-08-18 18:41:57,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:57,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61962913] [2020-08-18 18:41:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:57,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 18:41:57,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61962913] [2020-08-18 18:41:57,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:57,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:41:57,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511930896] [2020-08-18 18:41:57,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:41:57,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:57,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:41:57,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:41:57,407 INFO L87 Difference]: Start difference. First operand 451 states and 638 transitions. Second operand 3 states. [2020-08-18 18:41:57,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:57,544 INFO L93 Difference]: Finished difference Result 936 states and 1328 transitions. [2020-08-18 18:41:57,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:41:57,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-08-18 18:41:57,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:57,548 INFO L225 Difference]: With dead ends: 936 [2020-08-18 18:41:57,548 INFO L226 Difference]: Without dead ends: 483 [2020-08-18 18:41:57,549 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 18:41:57,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2020-08-18 18:41:57,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 475. [2020-08-18 18:41:57,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2020-08-18 18:41:57,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 667 transitions. [2020-08-18 18:41:57,565 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 667 transitions. Word has length 84 [2020-08-18 18:41:57,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:57,566 INFO L479 AbstractCegarLoop]: Abstraction has 475 states and 667 transitions. [2020-08-18 18:41:57,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:41:57,566 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 667 transitions. [2020-08-18 18:41:57,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-18 18:41:57,568 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:57,568 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:57,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 18:41:57,569 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:57,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:57,569 INFO L82 PathProgramCache]: Analyzing trace with hash 404037349, now seen corresponding path program 1 times [2020-08-18 18:41:57,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:57,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395524907] [2020-08-18 18:41:57,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:57,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:57,630 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-08-18 18:41:57,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395524907] [2020-08-18 18:41:57,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:57,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:41:57,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747051439] [2020-08-18 18:41:57,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:41:57,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:57,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:41:57,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:41:57,633 INFO L87 Difference]: Start difference. First operand 475 states and 667 transitions. Second operand 3 states. [2020-08-18 18:41:57,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:57,804 INFO L93 Difference]: Finished difference Result 965 states and 1373 transitions. [2020-08-18 18:41:57,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:41:57,805 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2020-08-18 18:41:57,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:57,808 INFO L225 Difference]: With dead ends: 965 [2020-08-18 18:41:57,808 INFO L226 Difference]: Without dead ends: 484 [2020-08-18 18:41:57,809 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 18:41:57,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-08-18 18:41:57,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 469. [2020-08-18 18:41:57,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-08-18 18:41:57,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 651 transitions. [2020-08-18 18:41:57,840 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 651 transitions. Word has length 99 [2020-08-18 18:41:57,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:57,840 INFO L479 AbstractCegarLoop]: Abstraction has 469 states and 651 transitions. [2020-08-18 18:41:57,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:41:57,841 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 651 transitions. [2020-08-18 18:41:57,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-18 18:41:57,842 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:57,843 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:57,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 18:41:57,843 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:57,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:57,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1557981007, now seen corresponding path program 1 times [2020-08-18 18:41:57,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:57,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630608969] [2020-08-18 18:41:57,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:57,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:57,898 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-18 18:41:57,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630608969] [2020-08-18 18:41:57,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:57,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:41:57,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760393500] [2020-08-18 18:41:57,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:41:57,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:57,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:41:57,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:41:57,900 INFO L87 Difference]: Start difference. First operand 469 states and 651 transitions. Second operand 3 states. [2020-08-18 18:41:57,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:57,972 INFO L93 Difference]: Finished difference Result 1381 states and 1919 transitions. [2020-08-18 18:41:57,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:41:57,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 107 [2020-08-18 18:41:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:57,978 INFO L225 Difference]: With dead ends: 1381 [2020-08-18 18:41:57,978 INFO L226 Difference]: Without dead ends: 925 [2020-08-18 18:41:57,980 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 18:41:57,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2020-08-18 18:41:58,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 923. [2020-08-18 18:41:58,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 923 states. [2020-08-18 18:41:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1278 transitions. [2020-08-18 18:41:58,014 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1278 transitions. Word has length 107 [2020-08-18 18:41:58,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:58,015 INFO L479 AbstractCegarLoop]: Abstraction has 923 states and 1278 transitions. [2020-08-18 18:41:58,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:41:58,015 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1278 transitions. [2020-08-18 18:41:58,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-18 18:41:58,018 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:58,018 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:58,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 18:41:58,018 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:58,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:58,019 INFO L82 PathProgramCache]: Analyzing trace with hash -2144787021, now seen corresponding path program 1 times [2020-08-18 18:41:58,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:58,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161296018] [2020-08-18 18:41:58,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 18:41:58,051 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 18:41:58,052 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 18:41:58,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 18:41:58,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:41:58 BoogieIcfgContainer [2020-08-18 18:41:58,088 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:41:58,091 INFO L168 Benchmark]: Toolchain (without parser) took 6156.83 ms. Allocated memory was 138.4 MB in the beginning and 297.3 MB in the end (delta: 158.9 MB). Free memory was 100.7 MB in the beginning and 193.4 MB in the end (delta: -92.7 MB). Peak memory consumption was 66.2 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:58,092 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 18:41:58,093 INFO L168 Benchmark]: CACSL2BoogieTranslator took 567.44 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 100.5 MB in the beginning and 176.0 MB in the end (delta: -75.5 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:58,093 INFO L168 Benchmark]: Boogie Preprocessor took 57.78 ms. Allocated memory is still 201.3 MB. Free memory was 176.0 MB in the beginning and 173.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:58,094 INFO L168 Benchmark]: RCFGBuilder took 909.74 ms. Allocated memory is still 201.3 MB. Free memory was 173.0 MB in the beginning and 119.5 MB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:58,095 INFO L168 Benchmark]: TraceAbstraction took 4615.41 ms. Allocated memory was 201.3 MB in the beginning and 297.3 MB in the end (delta: 95.9 MB). Free memory was 118.8 MB in the beginning and 193.4 MB in the end (delta: -74.6 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:58,098 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 567.44 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 100.5 MB in the beginning and 176.0 MB in the end (delta: -75.5 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 57.78 ms. Allocated memory is still 201.3 MB. Free memory was 176.0 MB in the beginning and 173.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 909.74 ms. Allocated memory is still 201.3 MB. Free memory was 173.0 MB in the beginning and 119.5 MB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4615.41 ms. Allocated memory was 201.3 MB in the beginning and 297.3 MB in the end (delta: 95.9 MB). Free memory was 118.8 MB in the beginning and 193.4 MB in the end (delta: -74.6 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 642]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L647] int s ; [L648] int tmp ; [L652] s = 8464 [L653] CALL ssl3_accept(s) [L11] int s__info_callback = __VERIFIER_nondet_int() ; [L12] int s__in_handshake = __VERIFIER_nondet_int() ; [L13] int s__state ; [L14] int s__new_session ; [L15] int s__server ; [L16] int s__version = __VERIFIER_nondet_int() ; [L17] int s__type ; [L18] int s__init_num ; [L19] int s__hit = __VERIFIER_nondet_int() ; [L20] int s__rwstate ; [L21] int s__init_buf___0 = 1; [L22] int s__debug = __VERIFIER_nondet_int() ; [L23] int s__shutdown ; [L24] int s__cert = __VERIFIER_nondet_int() ; [L25] int s__options = __VERIFIER_nondet_int() ; [L26] int s__verify_mode = __VERIFIER_nondet_int() ; [L27] int s__session__peer = __VERIFIER_nondet_int() ; [L28] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L29] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L30] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L31] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L32] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L33] int s__s3__tmp__cert_request ; [L34] int s__s3__tmp__reuse_message ; [L35] int s__s3__tmp__use_rsa_tmp ; [L36] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L37] int s__s3__tmp__new_cipher__algorithms ; [L38] int s__s3__tmp__next_state___0 ; [L39] int s__s3__tmp__new_cipher__algo_strength ; [L40] int s__session__cipher ; [L41] int buf ; [L42] unsigned long l ; [L43] unsigned long Time ; [L44] unsigned long tmp ; [L45] int cb ; [L46] long num1 = __VERIFIER_nondet_long() ; [L47] int ret ; [L48] int new_state ; [L49] int state ; [L50] int skip ; [L51] int got_new_session ; [L52] int tmp___1 = __VERIFIER_nondet_int() ; [L53] int tmp___2 = __VERIFIER_nondet_int() ; [L54] int tmp___3 = __VERIFIER_nondet_int() ; [L55] int tmp___4 = __VERIFIER_nondet_int() ; [L56] int tmp___5 = __VERIFIER_nondet_int() ; [L57] int tmp___6 = __VERIFIER_nondet_int() ; [L58] int tmp___7 = __VERIFIER_nondet_int() ; [L59] long tmp___8 = __VERIFIER_nondet_long() ; [L60] int tmp___9 = __VERIFIER_nondet_int() ; [L61] int tmp___10 = __VERIFIER_nondet_int() ; [L62] int blastFlag ; [L63] int __cil_tmp55 ; [L64] unsigned long __cil_tmp56 ; [L65] unsigned long __cil_tmp57 ; [L66] unsigned long __cil_tmp58 ; [L67] unsigned long __cil_tmp59 ; [L68] int __cil_tmp60 ; [L69] unsigned long __cil_tmp61 ; [L72] s__state = initial_state [L73] blastFlag = 0 [L74] tmp = __VERIFIER_nondet_int() [L75] Time = tmp [L76] cb = 0 [L77] ret = -1 [L78] skip = 0 [L79] got_new_session = 0 [L80] COND TRUE s__info_callback != 0 [L81] cb = s__info_callback [L87] s__in_handshake ++ [L88] COND FALSE !(tmp___1 + 12288) [L93] COND FALSE !(s__cert == 0) [L97] COND TRUE 1 [L99] state = s__state [L100] COND FALSE !(s__state == 12292) [L103] COND FALSE !(s__state == 16384) [L106] COND FALSE !(s__state == 8192) [L109] COND FALSE !(s__state == 24576) [L112] COND FALSE !(s__state == 8195) [L115] COND FALSE !(s__state == 8480) [L118] COND FALSE !(s__state == 8481) [L121] COND FALSE !(s__state == 8482) [L124] COND TRUE s__state == 8464 [L270] s__shutdown = 0 [L271] ret = __VERIFIER_nondet_int() [L272] COND TRUE blastFlag == 0 [L273] blastFlag = 1 [L275] COND FALSE !(ret <= 0) [L278] got_new_session = 1 [L279] s__state = 8496 [L280] s__init_num = 0 [L599] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L600] COND FALSE !(! s__s3__tmp__reuse_message) [L631] skip = 0 [L97] COND TRUE 1 [L99] state = s__state [L100] COND FALSE !(s__state == 12292) [L103] COND FALSE !(s__state == 16384) [L106] COND FALSE !(s__state == 8192) [L109] COND FALSE !(s__state == 24576) [L112] COND FALSE !(s__state == 8195) [L115] COND FALSE !(s__state == 8480) [L118] COND FALSE !(s__state == 8481) [L121] COND FALSE !(s__state == 8482) [L124] COND FALSE !(s__state == 8464) [L127] COND FALSE !(s__state == 8465) [L130] COND FALSE !(s__state == 8466) [L133] COND TRUE s__state == 8496 [L284] ret = __VERIFIER_nondet_int() [L285] COND TRUE blastFlag == 1 [L286] blastFlag = 2 [L288] COND FALSE !(ret <= 0) [L291] COND FALSE !(\read(s__hit)) [L294] s__state = 8512 [L296] s__init_num = 0 [L599] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L600] COND FALSE !(! s__s3__tmp__reuse_message) [L631] skip = 0 [L97] COND TRUE 1 [L99] state = s__state [L100] COND FALSE !(s__state == 12292) [L103] COND FALSE !(s__state == 16384) [L106] COND FALSE !(s__state == 8192) [L109] COND FALSE !(s__state == 24576) [L112] COND FALSE !(s__state == 8195) [L115] COND FALSE !(s__state == 8480) [L118] COND FALSE !(s__state == 8481) [L121] COND FALSE !(s__state == 8482) [L124] COND FALSE !(s__state == 8464) [L127] COND FALSE !(s__state == 8465) [L130] COND FALSE !(s__state == 8466) [L133] COND FALSE !(s__state == 8496) [L136] COND FALSE !(s__state == 8497) [L139] COND TRUE s__state == 8512 [L301] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L302] __cil_tmp56 = (unsigned long )s__s3__tmp__new_cipher__algorithms [L303] COND TRUE __cil_tmp56 + 256UL [L304] skip = 1 [L315] s__state = 8528 [L316] s__init_num = 0 [L599] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L600] COND FALSE !(! s__s3__tmp__reuse_message) [L631] skip = 0 [L97] COND TRUE 1 [L99] state = s__state [L100] COND FALSE !(s__state == 12292) [L103] COND FALSE !(s__state == 16384) [L106] COND FALSE !(s__state == 8192) [L109] COND FALSE !(s__state == 24576) [L112] COND FALSE !(s__state == 8195) [L115] COND FALSE !(s__state == 8480) [L118] COND FALSE !(s__state == 8481) [L121] COND FALSE !(s__state == 8482) [L124] COND FALSE !(s__state == 8464) [L127] COND FALSE !(s__state == 8465) [L130] COND FALSE !(s__state == 8466) [L133] COND FALSE !(s__state == 8496) [L136] COND FALSE !(s__state == 8497) [L139] COND FALSE !(s__state == 8512) [L142] COND FALSE !(s__state == 8513) [L145] COND TRUE s__state == 8528 [L320] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L321] l = (unsigned long )s__s3__tmp__new_cipher__algorithms [L323] __cil_tmp57 = (unsigned long )s__options [L324] COND TRUE __cil_tmp57 + 2097152UL [L325] s__s3__tmp__use_rsa_tmp = 1 [L330] COND TRUE \read(s__s3__tmp__use_rsa_tmp) [L357] ret = __VERIFIER_nondet_int() [L358] COND FALSE !(blastFlag == 6) [L361] COND FALSE !(ret <= 0) [L378] s__state = 8544 [L379] s__init_num = 0 [L599] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L600] COND TRUE ! s__s3__tmp__reuse_message [L601] COND TRUE ! skip [L602] COND TRUE state == 8528 [L603] COND TRUE s__state == 8544 [L604] COND TRUE tmp___7 != 1024 [L605] COND TRUE tmp___7 != 512 [L606] COND TRUE __cil_tmp58 != 4294967294 [L607] COND TRUE l != 4294967266 [L642] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 161 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.5s, OverallIterations: 13, TraceHistogramMax: 4, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2670 SDtfs, 1939 SDslu, 2959 SDs, 0 SdLazy, 1406 SolverSat, 341 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=923occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 341 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 950 NumberOfCodeBlocks, 950 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 831 ConstructedInterpolants, 0 QuantifiedInterpolants, 106011 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 10 PerfectInterpolantSequences, 421/425 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...