/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -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-c90d42b [2020-09-24 14:57:45,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 14:57:45,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 14:57:46,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 14:57:46,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 14:57:46,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 14:57:46,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 14:57:46,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 14:57:46,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 14:57:46,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 14:57:46,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 14:57:46,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 14:57:46,015 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 14:57:46,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 14:57:46,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 14:57:46,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 14:57:46,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 14:57:46,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 14:57:46,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 14:57:46,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 14:57:46,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 14:57:46,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 14:57:46,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 14:57:46,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 14:57:46,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 14:57:46,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 14:57:46,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 14:57:46,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 14:57:46,046 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 14:57:46,074 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 14:57:46,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 14:57:46,076 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 14:57:46,076 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 14:57:46,076 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 14:57:46,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 14:57:46,077 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 14:57:46,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 14:57:46,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 14:57:46,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 14:57:46,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 14:57:46,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 14:57:46,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 14:57:46,078 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 14:57:46,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 14:57:46,078 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 14:57:46,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 14:57:46,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 14:57:46,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 14:57:46,079 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 14:57:46,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 14:57:46,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:57:46,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 14:57:46,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 14:57:46,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 14:57:46,081 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 14:57:46,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 14:57:46,081 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 14:57:46,081 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 14:57:46,081 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 14:57:46,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 14:57:46,583 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 14:57:46,589 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 14:57:46,592 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 14:57:46,592 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 14:57:46,594 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_13.cil.c [2020-09-24 14:57:46,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c327243af/7e90299fc4254f1b9ebe09497bcf52a4/FLAGd0acaee39 [2020-09-24 14:57:47,277 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 14:57:47,278 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_13.cil.c [2020-09-24 14:57:47,292 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c327243af/7e90299fc4254f1b9ebe09497bcf52a4/FLAGd0acaee39 [2020-09-24 14:57:47,577 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c327243af/7e90299fc4254f1b9ebe09497bcf52a4 [2020-09-24 14:57:47,591 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 14:57:47,597 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 14:57:47,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 14:57:47,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 14:57:47,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 14:57:47,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:57:47" (1/1) ... [2020-09-24 14:57:47,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@526e8c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:47, skipping insertion in model container [2020-09-24 14:57:47,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:57:47" (1/1) ... [2020-09-24 14:57:47,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 14:57:47,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 14:57:47,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:57:47,981 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 14:57:48,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:57:48,194 INFO L208 MainTranslator]: Completed translation [2020-09-24 14:57:48,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:48 WrapperNode [2020-09-24 14:57:48,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 14:57:48,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 14:57:48,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 14:57:48,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 14:57:48,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:48" (1/1) ... [2020-09-24 14:57:48,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:48" (1/1) ... [2020-09-24 14:57:48,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:48" (1/1) ... [2020-09-24 14:57:48,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:48" (1/1) ... [2020-09-24 14:57:48,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:48" (1/1) ... [2020-09-24 14:57:48,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:48" (1/1) ... [2020-09-24 14:57:48,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:48" (1/1) ... [2020-09-24 14:57:48,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 14:57:48,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 14:57:48,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 14:57:48,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 14:57:48,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:57:48,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 14:57:48,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 14:57:48,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-09-24 14:57:48,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 14:57:48,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 14:57:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 14:57:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 14:57:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-09-24 14:57:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-09-24 14:57:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 14:57:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 14:57:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 14:57:48,581 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-09-24 14:57:49,366 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-09-24 14:57:49,367 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-09-24 14:57:49,392 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 14:57:49,393 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 14:57:49,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:57:49 BoogieIcfgContainer [2020-09-24 14:57:49,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 14:57:49,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 14:57:49,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 14:57:49,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 14:57:49,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:57:47" (1/3) ... [2020-09-24 14:57:49,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@df7557d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:57:49, skipping insertion in model container [2020-09-24 14:57:49,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:48" (2/3) ... [2020-09-24 14:57:49,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@df7557d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:57:49, skipping insertion in model container [2020-09-24 14:57:49,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:57:49" (3/3) ... [2020-09-24 14:57:49,419 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_13.cil.c [2020-09-24 14:57:49,431 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 14:57:49,442 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 14:57:49,461 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 14:57:49,496 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 14:57:49,496 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 14:57:49,496 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 14:57:49,496 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 14:57:49,496 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 14:57:49,497 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 14:57:49,497 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 14:57:49,497 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 14:57:49,528 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states. [2020-09-24 14:57:49,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-09-24 14:57:49,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:49,548 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:49,549 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:49,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:49,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1103530067, now seen corresponding path program 1 times [2020-09-24 14:57:49,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:49,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592821025] [2020-09-24 14:57:49,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:50,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:57:50,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592821025] [2020-09-24 14:57:50,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:50,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 14:57:50,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914184921] [2020-09-24 14:57:50,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 14:57:50,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:50,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 14:57:50,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:57:50,184 INFO L87 Difference]: Start difference. First operand 440 states. Second operand 6 states. [2020-09-24 14:57:50,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:50,783 INFO L93 Difference]: Finished difference Result 832 states and 1103 transitions. [2020-09-24 14:57:50,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 14:57:50,785 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2020-09-24 14:57:50,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:50,811 INFO L225 Difference]: With dead ends: 832 [2020-09-24 14:57:50,811 INFO L226 Difference]: Without dead ends: 472 [2020-09-24 14:57:50,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:57:50,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-09-24 14:57:50,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 459. [2020-09-24 14:57:50,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2020-09-24 14:57:50,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 549 transitions. [2020-09-24 14:57:50,916 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 549 transitions. Word has length 160 [2020-09-24 14:57:50,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:50,917 INFO L479 AbstractCegarLoop]: Abstraction has 459 states and 549 transitions. [2020-09-24 14:57:50,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 14:57:50,918 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 549 transitions. [2020-09-24 14:57:50,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-09-24 14:57:50,922 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:50,923 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:50,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 14:57:50,923 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:50,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:50,924 INFO L82 PathProgramCache]: Analyzing trace with hash -466072829, now seen corresponding path program 1 times [2020-09-24 14:57:50,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:50,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017847876] [2020-09-24 14:57:50,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:51,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:57:51,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017847876] [2020-09-24 14:57:51,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:51,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:51,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412977966] [2020-09-24 14:57:51,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:51,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:51,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:51,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:51,147 INFO L87 Difference]: Start difference. First operand 459 states and 549 transitions. Second operand 3 states. [2020-09-24 14:57:51,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:51,243 INFO L93 Difference]: Finished difference Result 1085 states and 1347 transitions. [2020-09-24 14:57:51,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:51,244 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 169 [2020-09-24 14:57:51,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:51,250 INFO L225 Difference]: With dead ends: 1085 [2020-09-24 14:57:51,250 INFO L226 Difference]: Without dead ends: 766 [2020-09-24 14:57:51,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:51,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2020-09-24 14:57:51,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 764. [2020-09-24 14:57:51,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 764 states. [2020-09-24 14:57:51,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 931 transitions. [2020-09-24 14:57:51,285 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 931 transitions. Word has length 169 [2020-09-24 14:57:51,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:51,286 INFO L479 AbstractCegarLoop]: Abstraction has 764 states and 931 transitions. [2020-09-24 14:57:51,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:51,286 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 931 transitions. [2020-09-24 14:57:51,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-09-24 14:57:51,290 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:51,290 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:51,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 14:57:51,291 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:51,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:51,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1669990880, now seen corresponding path program 1 times [2020-09-24 14:57:51,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:51,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537795370] [2020-09-24 14:57:51,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:51,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:57:51,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537795370] [2020-09-24 14:57:51,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:51,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:51,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085423889] [2020-09-24 14:57:51,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:51,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:51,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:51,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:51,456 INFO L87 Difference]: Start difference. First operand 764 states and 931 transitions. Second operand 3 states. [2020-09-24 14:57:51,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:51,825 INFO L93 Difference]: Finished difference Result 1539 states and 1955 transitions. [2020-09-24 14:57:51,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:51,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2020-09-24 14:57:51,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:51,834 INFO L225 Difference]: With dead ends: 1539 [2020-09-24 14:57:51,835 INFO L226 Difference]: Without dead ends: 891 [2020-09-24 14:57:51,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:51,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2020-09-24 14:57:51,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 822. [2020-09-24 14:57:51,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 822 states. [2020-09-24 14:57:51,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1019 transitions. [2020-09-24 14:57:51,874 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1019 transitions. Word has length 170 [2020-09-24 14:57:51,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:51,876 INFO L479 AbstractCegarLoop]: Abstraction has 822 states and 1019 transitions. [2020-09-24 14:57:51,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:51,876 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1019 transitions. [2020-09-24 14:57:51,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-09-24 14:57:51,880 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:51,880 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:51,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 14:57:51,881 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:51,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:51,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1230208187, now seen corresponding path program 1 times [2020-09-24 14:57:51,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:51,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070852445] [2020-09-24 14:57:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:52,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:57:52,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070852445] [2020-09-24 14:57:52,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:52,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 14:57:52,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386193551] [2020-09-24 14:57:52,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 14:57:52,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:52,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 14:57:52,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:57:52,098 INFO L87 Difference]: Start difference. First operand 822 states and 1019 transitions. Second operand 6 states. [2020-09-24 14:57:52,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:52,493 INFO L93 Difference]: Finished difference Result 1293 states and 1643 transitions. [2020-09-24 14:57:52,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 14:57:52,494 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 175 [2020-09-24 14:57:52,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:52,498 INFO L225 Difference]: With dead ends: 1293 [2020-09-24 14:57:52,498 INFO L226 Difference]: Without dead ends: 585 [2020-09-24 14:57:52,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:57:52,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-09-24 14:57:52,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 569. [2020-09-24 14:57:52,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2020-09-24 14:57:52,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 703 transitions. [2020-09-24 14:57:52,516 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 703 transitions. Word has length 175 [2020-09-24 14:57:52,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:52,516 INFO L479 AbstractCegarLoop]: Abstraction has 569 states and 703 transitions. [2020-09-24 14:57:52,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 14:57:52,517 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 703 transitions. [2020-09-24 14:57:52,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-09-24 14:57:52,519 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:52,520 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:52,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 14:57:52,520 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:52,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:52,521 INFO L82 PathProgramCache]: Analyzing trace with hash -312164926, now seen corresponding path program 1 times [2020-09-24 14:57:52,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:52,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885931237] [2020-09-24 14:57:52,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:52,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:52,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:57:52,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885931237] [2020-09-24 14:57:52,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:52,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:52,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745128665] [2020-09-24 14:57:52,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:52,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:52,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:52,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:52,640 INFO L87 Difference]: Start difference. First operand 569 states and 703 transitions. Second operand 3 states. [2020-09-24 14:57:52,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:52,737 INFO L93 Difference]: Finished difference Result 1382 states and 1775 transitions. [2020-09-24 14:57:52,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:52,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 197 [2020-09-24 14:57:52,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:52,747 INFO L225 Difference]: With dead ends: 1382 [2020-09-24 14:57:52,748 INFO L226 Difference]: Without dead ends: 969 [2020-09-24 14:57:52,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:52,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2020-09-24 14:57:52,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 967. [2020-09-24 14:57:52,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 967 states. [2020-09-24 14:57:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1221 transitions. [2020-09-24 14:57:52,792 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1221 transitions. Word has length 197 [2020-09-24 14:57:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:52,793 INFO L479 AbstractCegarLoop]: Abstraction has 967 states and 1221 transitions. [2020-09-24 14:57:52,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:52,793 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1221 transitions. [2020-09-24 14:57:52,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-09-24 14:57:52,799 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:52,799 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:52,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 14:57:52,800 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:52,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:52,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1190618208, now seen corresponding path program 1 times [2020-09-24 14:57:52,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:52,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175720160] [2020-09-24 14:57:52,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:52,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:52,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 14:57:53,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175720160] [2020-09-24 14:57:53,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:53,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:53,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939826134] [2020-09-24 14:57:53,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:53,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:53,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:53,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:53,025 INFO L87 Difference]: Start difference. First operand 967 states and 1221 transitions. Second operand 3 states. [2020-09-24 14:57:53,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:53,357 INFO L93 Difference]: Finished difference Result 1889 states and 2467 transitions. [2020-09-24 14:57:53,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:53,358 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 198 [2020-09-24 14:57:53,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:53,372 INFO L225 Difference]: With dead ends: 1889 [2020-09-24 14:57:53,372 INFO L226 Difference]: Without dead ends: 1078 [2020-09-24 14:57:53,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:53,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2020-09-24 14:57:53,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 1062. [2020-09-24 14:57:53,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1062 states. [2020-09-24 14:57:53,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1334 transitions. [2020-09-24 14:57:53,436 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1334 transitions. Word has length 198 [2020-09-24 14:57:53,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:53,437 INFO L479 AbstractCegarLoop]: Abstraction has 1062 states and 1334 transitions. [2020-09-24 14:57:53,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:53,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1334 transitions. [2020-09-24 14:57:53,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-09-24 14:57:53,443 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:53,444 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:53,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 14:57:53,445 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:53,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:53,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1815361344, now seen corresponding path program 1 times [2020-09-24 14:57:53,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:53,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962677423] [2020-09-24 14:57:53,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:53,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 14:57:53,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962677423] [2020-09-24 14:57:53,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:53,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:53,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760752406] [2020-09-24 14:57:53,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:53,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:53,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:53,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:53,609 INFO L87 Difference]: Start difference. First operand 1062 states and 1334 transitions. Second operand 3 states. [2020-09-24 14:57:53,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:53,883 INFO L93 Difference]: Finished difference Result 2052 states and 2632 transitions. [2020-09-24 14:57:53,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:53,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 198 [2020-09-24 14:57:53,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:53,889 INFO L225 Difference]: With dead ends: 2052 [2020-09-24 14:57:53,889 INFO L226 Difference]: Without dead ends: 1126 [2020-09-24 14:57:53,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:53,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2020-09-24 14:57:53,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 1093. [2020-09-24 14:57:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1093 states. [2020-09-24 14:57:53,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1379 transitions. [2020-09-24 14:57:53,925 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1379 transitions. Word has length 198 [2020-09-24 14:57:53,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:53,943 INFO L479 AbstractCegarLoop]: Abstraction has 1093 states and 1379 transitions. [2020-09-24 14:57:53,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:53,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1379 transitions. [2020-09-24 14:57:53,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-09-24 14:57:53,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:53,947 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:53,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 14:57:53,948 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:53,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:53,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1252882748, now seen corresponding path program 1 times [2020-09-24 14:57:53,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:53,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220129585] [2020-09-24 14:57:53,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:54,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 14:57:54,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220129585] [2020-09-24 14:57:54,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:54,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:54,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485826434] [2020-09-24 14:57:54,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:54,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:54,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:54,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:54,063 INFO L87 Difference]: Start difference. First operand 1093 states and 1379 transitions. Second operand 3 states. [2020-09-24 14:57:54,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:54,115 INFO L93 Difference]: Finished difference Result 2050 states and 2622 transitions. [2020-09-24 14:57:54,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:54,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 207 [2020-09-24 14:57:54,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:54,122 INFO L225 Difference]: With dead ends: 2050 [2020-09-24 14:57:54,122 INFO L226 Difference]: Without dead ends: 1113 [2020-09-24 14:57:54,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:54,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2020-09-24 14:57:54,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1111. [2020-09-24 14:57:54,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1111 states. [2020-09-24 14:57:54,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1399 transitions. [2020-09-24 14:57:54,185 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1399 transitions. Word has length 207 [2020-09-24 14:57:54,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:54,186 INFO L479 AbstractCegarLoop]: Abstraction has 1111 states and 1399 transitions. [2020-09-24 14:57:54,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:54,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1399 transitions. [2020-09-24 14:57:54,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-09-24 14:57:54,191 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:54,191 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:54,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 14:57:54,192 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:54,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:54,192 INFO L82 PathProgramCache]: Analyzing trace with hash -50860722, now seen corresponding path program 1 times [2020-09-24 14:57:54,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:54,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508108438] [2020-09-24 14:57:54,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:54,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:54,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 14:57:54,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508108438] [2020-09-24 14:57:54,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:54,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:57:54,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924377222] [2020-09-24 14:57:54,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:57:54,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:54,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:57:54,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:57:54,349 INFO L87 Difference]: Start difference. First operand 1111 states and 1399 transitions. Second operand 4 states. [2020-09-24 14:57:54,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:54,616 INFO L93 Difference]: Finished difference Result 2163 states and 2744 transitions. [2020-09-24 14:57:54,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:57:54,616 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 209 [2020-09-24 14:57:54,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:54,624 INFO L225 Difference]: With dead ends: 2163 [2020-09-24 14:57:54,624 INFO L226 Difference]: Without dead ends: 1208 [2020-09-24 14:57:54,627 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 [2020-09-24 14:57:54,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2020-09-24 14:57:54,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1131. [2020-09-24 14:57:54,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1131 states. [2020-09-24 14:57:54,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1419 transitions. [2020-09-24 14:57:54,679 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1419 transitions. Word has length 209 [2020-09-24 14:57:54,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:54,680 INFO L479 AbstractCegarLoop]: Abstraction has 1131 states and 1419 transitions. [2020-09-24 14:57:54,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:57:54,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1419 transitions. [2020-09-24 14:57:54,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-09-24 14:57:54,687 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:54,687 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:54,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 14:57:54,688 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:54,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:54,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1999743939, now seen corresponding path program 1 times [2020-09-24 14:57:54,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:54,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173862811] [2020-09-24 14:57:54,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:54,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:54,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 14:57:54,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173862811] [2020-09-24 14:57:54,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:54,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:54,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038852368] [2020-09-24 14:57:54,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:54,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:54,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:54,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:54,847 INFO L87 Difference]: Start difference. First operand 1131 states and 1419 transitions. Second operand 3 states. [2020-09-24 14:57:55,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:55,159 INFO L93 Difference]: Finished difference Result 2295 states and 2960 transitions. [2020-09-24 14:57:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:55,160 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 211 [2020-09-24 14:57:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:55,166 INFO L225 Difference]: With dead ends: 2295 [2020-09-24 14:57:55,167 INFO L226 Difference]: Without dead ends: 1284 [2020-09-24 14:57:55,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:55,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2020-09-24 14:57:55,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1207. [2020-09-24 14:57:55,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1207 states. [2020-09-24 14:57:55,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1529 transitions. [2020-09-24 14:57:55,213 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1529 transitions. Word has length 211 [2020-09-24 14:57:55,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:55,214 INFO L479 AbstractCegarLoop]: Abstraction has 1207 states and 1529 transitions. [2020-09-24 14:57:55,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:55,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1529 transitions. [2020-09-24 14:57:55,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-09-24 14:57:55,218 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:55,218 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:55,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 14:57:55,219 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:55,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:55,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1941211029, now seen corresponding path program 1 times [2020-09-24 14:57:55,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:55,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208224353] [2020-09-24 14:57:55,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:55,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:57:55,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208224353] [2020-09-24 14:57:55,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:55,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:57:55,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761166474] [2020-09-24 14:57:55,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:57:55,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:55,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:57:55,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:57:55,340 INFO L87 Difference]: Start difference. First operand 1207 states and 1529 transitions. Second operand 4 states. [2020-09-24 14:57:55,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:55,866 INFO L93 Difference]: Finished difference Result 3413 states and 4441 transitions. [2020-09-24 14:57:55,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:57:55,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 216 [2020-09-24 14:57:55,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:55,878 INFO L225 Difference]: With dead ends: 3413 [2020-09-24 14:57:55,879 INFO L226 Difference]: Without dead ends: 2338 [2020-09-24 14:57:55,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:57:55,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2020-09-24 14:57:55,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 1243. [2020-09-24 14:57:55,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1243 states. [2020-09-24 14:57:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1583 transitions. [2020-09-24 14:57:55,936 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1583 transitions. Word has length 216 [2020-09-24 14:57:55,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:55,937 INFO L479 AbstractCegarLoop]: Abstraction has 1243 states and 1583 transitions. [2020-09-24 14:57:55,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:57:55,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1583 transitions. [2020-09-24 14:57:55,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-09-24 14:57:55,941 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:55,942 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:55,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 14:57:55,942 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:55,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:55,943 INFO L82 PathProgramCache]: Analyzing trace with hash -165389337, now seen corresponding path program 1 times [2020-09-24 14:57:55,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:55,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395433890] [2020-09-24 14:57:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:56,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 14:57:56,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395433890] [2020-09-24 14:57:56,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:56,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:56,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539544853] [2020-09-24 14:57:56,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:56,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:56,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:56,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:56,073 INFO L87 Difference]: Start difference. First operand 1243 states and 1583 transitions. Second operand 3 states. [2020-09-24 14:57:56,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:56,174 INFO L93 Difference]: Finished difference Result 2889 states and 3745 transitions. [2020-09-24 14:57:56,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:56,175 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 232 [2020-09-24 14:57:56,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:56,184 INFO L225 Difference]: With dead ends: 2889 [2020-09-24 14:57:56,184 INFO L226 Difference]: Without dead ends: 1802 [2020-09-24 14:57:56,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:56,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2020-09-24 14:57:56,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1800. [2020-09-24 14:57:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1800 states. [2020-09-24 14:57:56,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2315 transitions. [2020-09-24 14:57:56,244 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2315 transitions. Word has length 232 [2020-09-24 14:57:56,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:56,245 INFO L479 AbstractCegarLoop]: Abstraction has 1800 states and 2315 transitions. [2020-09-24 14:57:56,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:56,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2315 transitions. [2020-09-24 14:57:56,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-09-24 14:57:56,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:56,251 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:56,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 14:57:56,251 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:56,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:56,251 INFO L82 PathProgramCache]: Analyzing trace with hash -662598379, now seen corresponding path program 1 times [2020-09-24 14:57:56,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:56,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538583126] [2020-09-24 14:57:56,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:56,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 14:57:56,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538583126] [2020-09-24 14:57:56,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:56,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:57:56,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343426965] [2020-09-24 14:57:56,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:57:56,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:56,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:57:56,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:57:56,422 INFO L87 Difference]: Start difference. First operand 1800 states and 2315 transitions. Second operand 4 states. [2020-09-24 14:57:56,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:56,927 INFO L93 Difference]: Finished difference Result 5166 states and 6784 transitions. [2020-09-24 14:57:56,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:57:56,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 244 [2020-09-24 14:57:56,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:56,943 INFO L225 Difference]: With dead ends: 5166 [2020-09-24 14:57:56,944 INFO L226 Difference]: Without dead ends: 3522 [2020-09-24 14:57:56,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:57:56,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3522 states. [2020-09-24 14:57:57,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3522 to 1809. [2020-09-24 14:57:57,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1809 states. [2020-09-24 14:57:57,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 2324 transitions. [2020-09-24 14:57:57,026 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 2324 transitions. Word has length 244 [2020-09-24 14:57:57,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:57,027 INFO L479 AbstractCegarLoop]: Abstraction has 1809 states and 2324 transitions. [2020-09-24 14:57:57,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:57:57,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 2324 transitions. [2020-09-24 14:57:57,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-09-24 14:57:57,035 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:57,035 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:57,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 14:57:57,036 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:57,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:57,036 INFO L82 PathProgramCache]: Analyzing trace with hash 435015861, now seen corresponding path program 1 times [2020-09-24 14:57:57,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:57,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57411063] [2020-09-24 14:57:57,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:57,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 14:57:57,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57411063] [2020-09-24 14:57:57,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:57,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:57:57,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519888587] [2020-09-24 14:57:57,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:57:57,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:57,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:57:57,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:57:57,176 INFO L87 Difference]: Start difference. First operand 1809 states and 2324 transitions. Second operand 4 states. [2020-09-24 14:57:57,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:57,628 INFO L93 Difference]: Finished difference Result 5214 states and 6800 transitions. [2020-09-24 14:57:57,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:57:57,629 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 244 [2020-09-24 14:57:57,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:57,646 INFO L225 Difference]: With dead ends: 5214 [2020-09-24 14:57:57,646 INFO L226 Difference]: Without dead ends: 3537 [2020-09-24 14:57:57,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:57:57,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2020-09-24 14:57:57,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 1849. [2020-09-24 14:57:57,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1849 states. [2020-09-24 14:57:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2386 transitions. [2020-09-24 14:57:57,738 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2386 transitions. Word has length 244 [2020-09-24 14:57:57,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:57,739 INFO L479 AbstractCegarLoop]: Abstraction has 1849 states and 2386 transitions. [2020-09-24 14:57:57,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:57:57,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2386 transitions. [2020-09-24 14:57:57,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-09-24 14:57:57,745 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:57,745 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:57,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 14:57:57,746 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:57,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:57,746 INFO L82 PathProgramCache]: Analyzing trace with hash -173027549, now seen corresponding path program 1 times [2020-09-24 14:57:57,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:57,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962504778] [2020-09-24 14:57:57,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:57,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 14:57:57,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962504778] [2020-09-24 14:57:57,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:57,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:57:57,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106373210] [2020-09-24 14:57:57,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:57:57,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:57,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:57:57,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:57:57,894 INFO L87 Difference]: Start difference. First operand 1849 states and 2386 transitions. Second operand 4 states. [2020-09-24 14:57:58,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:58,411 INFO L93 Difference]: Finished difference Result 4492 states and 5930 transitions. [2020-09-24 14:57:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:57:58,412 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 247 [2020-09-24 14:57:58,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:58,426 INFO L225 Difference]: With dead ends: 4492 [2020-09-24 14:57:58,427 INFO L226 Difference]: Without dead ends: 2769 [2020-09-24 14:57:58,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:57:58,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2020-09-24 14:57:58,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 1400. [2020-09-24 14:57:58,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1400 states. [2020-09-24 14:57:58,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 1741 transitions. [2020-09-24 14:57:58,501 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 1741 transitions. Word has length 247 [2020-09-24 14:57:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:58,502 INFO L479 AbstractCegarLoop]: Abstraction has 1400 states and 1741 transitions. [2020-09-24 14:57:58,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:57:58,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 1741 transitions. [2020-09-24 14:57:58,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-09-24 14:57:58,509 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:58,509 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:58,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 14:57:58,510 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:58,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:58,511 INFO L82 PathProgramCache]: Analyzing trace with hash -196875119, now seen corresponding path program 1 times [2020-09-24 14:57:58,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:58,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378529147] [2020-09-24 14:57:58,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 14:57:58,574 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 14:57:58,576 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 14:57:58,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 14:57:58,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 02:57:58 BoogieIcfgContainer [2020-09-24 14:57:58,640 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 14:57:58,643 INFO L168 Benchmark]: Toolchain (without parser) took 11049.27 ms. Allocated memory was 146.8 MB in the beginning and 441.5 MB in the end (delta: 294.6 MB). Free memory was 102.3 MB in the beginning and 110.3 MB in the end (delta: -8.0 MB). Peak memory consumption was 286.7 MB. Max. memory is 7.1 GB. [2020-09-24 14:57:58,643 INFO L168 Benchmark]: CDTParser took 0.50 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 14:57:58,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 597.02 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 101.9 MB in the beginning and 178.8 MB in the end (delta: -76.9 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. [2020-09-24 14:57:58,651 INFO L168 Benchmark]: Boogie Preprocessor took 69.97 ms. Allocated memory is still 203.9 MB. Free memory was 178.8 MB in the beginning and 176.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-09-24 14:57:58,652 INFO L168 Benchmark]: RCFGBuilder took 1138.30 ms. Allocated memory is still 203.9 MB. Free memory was 176.1 MB in the beginning and 103.1 MB in the end (delta: 73.0 MB). Peak memory consumption was 73.0 MB. Max. memory is 7.1 GB. [2020-09-24 14:57:58,653 INFO L168 Benchmark]: TraceAbstraction took 9234.52 ms. Allocated memory was 203.9 MB in the beginning and 441.5 MB in the end (delta: 237.5 MB). Free memory was 103.1 MB in the beginning and 110.3 MB in the end (delta: -7.2 MB). Peak memory consumption was 230.3 MB. Max. memory is 7.1 GB. [2020-09-24 14:57:58,660 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 597.02 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 101.9 MB in the beginning and 178.8 MB in the end (delta: -76.9 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 69.97 ms. Allocated memory is still 203.9 MB. Free memory was 178.8 MB in the beginning and 176.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1138.30 ms. Allocated memory is still 203.9 MB. Free memory was 176.1 MB in the beginning and 103.1 MB in the end (delta: 73.0 MB). Peak memory consumption was 73.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9234.52 ms. Allocated memory was 203.9 MB in the beginning and 441.5 MB in the end (delta: 237.5 MB). Free memory was 103.1 MB in the beginning and 110.3 MB in the end (delta: -7.2 MB). Peak memory consumption was 230.3 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, 440 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.0s, OverallIterations: 16, TraceHistogramMax: 4, AutomataDifference: 5.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 8226 SDtfs, 6707 SDslu, 8930 SDs, 0 SdLazy, 2374 SolverSat, 495 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 104 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1849occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 15 MinimizatonAttempts, 6174 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 3342 NumberOfCodeBlocks, 3342 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 3062 ConstructedInterpolants, 0 QuantifiedInterpolants, 869418 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 15 PerfectInterpolantSequences, 311/311 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...