/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 true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:06:26,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:06:26,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:06:26,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:06:26,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:06:26,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:06:26,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:06:26,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:06:26,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:06:26,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:06:26,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:06:26,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:06:26,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:06:26,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:06:26,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:06:26,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:06:26,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:06:26,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:06:26,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:06:26,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:06:26,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:06:26,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:06:26,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:06:26,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:06:26,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:06:26,259 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:06:26,260 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:06:26,263 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:06:26,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:06:26,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 17:06:26,266 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 17:06:26,267 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 17:06:26,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 17:06:26,269 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 17:06:26,271 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 17:06:26,271 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 17:06:26,272 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 17:06:26,272 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 17:06:26,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:06:26,273 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:06:26,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:06:26,276 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 17:06:26,338 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:06:26,338 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:06:26,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:06:26,340 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:06:26,340 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:06:26,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:06:26,341 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:06:26,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:06:26,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:06:26,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:06:26,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:06:26,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:06:26,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:06:26,343 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:06:26,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:06:26,343 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:06:26,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:06:26,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:06:26,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:06:26,344 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:06:26,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:06:26,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:06:26,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:06:26,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:06:26,346 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:06:26,346 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:06:26,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:06:26,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:06:26,347 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:06:26,347 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 -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; [2020-09-24 17:06:26,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:06:26,838 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:06:26,842 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:06:26,844 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:06:26,845 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:06:26,846 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-09-24 17:06:26,943 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/001b6535b/865dda176b32444489496deb8ee5084a/FLAGf968dd5d2 [2020-09-24 17:06:27,534 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:06:27,535 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-09-24 17:06:27,551 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/001b6535b/865dda176b32444489496deb8ee5084a/FLAGf968dd5d2 [2020-09-24 17:06:27,839 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/001b6535b/865dda176b32444489496deb8ee5084a [2020-09-24 17:06:27,855 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:06:27,862 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:06:27,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:06:27,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:06:27,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:06:27,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:06:27" (1/1) ... [2020-09-24 17:06:27,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78523b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:06:27, skipping insertion in model container [2020-09-24 17:06:27,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:06:27" (1/1) ... [2020-09-24 17:06:27,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:06:27,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:06:28,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:06:28,269 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:06:28,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:06:28,482 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:06:28,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:06:28 WrapperNode [2020-09-24 17:06:28,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:06:28,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:06:28,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:06:28,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:06:28,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:06:28" (1/1) ... [2020-09-24 17:06:28,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:06:28" (1/1) ... [2020-09-24 17:06:28,511 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:06:28" (1/1) ... [2020-09-24 17:06:28,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:06:28" (1/1) ... [2020-09-24 17:06:28,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:06:28" (1/1) ... [2020-09-24 17:06:28,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:06:28" (1/1) ... [2020-09-24 17:06:28,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:06:28" (1/1) ... [2020-09-24 17:06:28,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:06:28,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:06:28,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:06:28,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:06:28,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:06:28" (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 17:06:28,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:06:28,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:06:28,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-09-24 17:06:28,632 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:06:28,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:06:28,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 17:06:28,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 17:06:28,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-09-24 17:06:28,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-09-24 17:06:28,633 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-09-24 17:06:28,633 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:06:28,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:06:28,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:06:28,917 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-09-24 17:06:29,661 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-09-24 17:06:29,662 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-09-24 17:06:29,695 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:06:29,697 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 17:06:29,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:06:29 BoogieIcfgContainer [2020-09-24 17:06:29,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:06:29,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:06:29,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:06:29,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:06:29,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:06:27" (1/3) ... [2020-09-24 17:06:29,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ce8252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:06:29, skipping insertion in model container [2020-09-24 17:06:29,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:06:28" (2/3) ... [2020-09-24 17:06:29,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ce8252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:06:29, skipping insertion in model container [2020-09-24 17:06:29,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:06:29" (3/3) ... [2020-09-24 17:06:29,734 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_12.cil.c [2020-09-24 17:06:29,747 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:06:29,765 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:06:29,787 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:06:29,824 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:06:29,824 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:06:29,824 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:06:29,824 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:06:29,824 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:06:29,825 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:06:29,825 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:06:29,825 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:06:29,887 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states. [2020-09-24 17:06:29,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-09-24 17:06:29,908 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:29,910 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] [2020-09-24 17:06:29,910 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:29,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:29,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1996743066, now seen corresponding path program 1 times [2020-09-24 17:06:29,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:29,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032287571] [2020-09-24 17:06:29,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:30,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:30,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:30,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:31,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:31,670 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:31,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-09-24 17:06:31,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:06:31,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1475 [2020-09-24 17:06:31,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:31,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 17:06:31,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 146 [2020-09-24 17:06:31,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 17:06:31,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:06:31,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:31,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:31,784 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:31,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:06:31,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:31,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:06:31,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:31,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:31,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:31,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:31,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:31,826 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 17:06:31,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032287571] [2020-09-24 17:06:31,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:06:31,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 17:06:31,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336774168] [2020-09-24 17:06:31,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 17:06:31,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:31,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 17:06:31,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:06:31,861 INFO L87 Difference]: Start difference. First operand 471 states. Second operand 4 states. [2020-09-24 17:06:32,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:32,217 INFO L93 Difference]: Finished difference Result 893 states and 1167 transitions. [2020-09-24 17:06:32,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:06:32,219 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2020-09-24 17:06:32,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:32,242 INFO L225 Difference]: With dead ends: 893 [2020-09-24 17:06:32,243 INFO L226 Difference]: Without dead ends: 501 [2020-09-24 17:06:32,253 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 17:06:32,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2020-09-24 17:06:32,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 465. [2020-09-24 17:06:32,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2020-09-24 17:06:32,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 563 transitions. [2020-09-24 17:06:32,358 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 563 transitions. Word has length 161 [2020-09-24 17:06:32,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:32,361 INFO L479 AbstractCegarLoop]: Abstraction has 465 states and 563 transitions. [2020-09-24 17:06:32,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 17:06:32,362 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 563 transitions. [2020-09-24 17:06:32,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-09-24 17:06:32,375 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:32,376 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] [2020-09-24 17:06:32,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:06:32,377 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:32,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:32,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1922098023, now seen corresponding path program 1 times [2020-09-24 17:06:32,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:32,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174742634] [2020-09-24 17:06:32,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:32,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:32,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:32,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:32,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:33,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:33,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:34,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:34,564 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:34,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-09-24 17:06:34,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 17:06:34,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2132 [2020-09-24 17:06:34,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:34,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 17:06:34,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 146 [2020-09-24 17:06:34,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 17:06:34,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:34,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:34,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:34,663 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:34,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:06:34,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:34,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:06:34,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:34,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:34,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:34,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:34,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:34,689 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 17:06:34,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174742634] [2020-09-24 17:06:34,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:06:34,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 17:06:34,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183035753] [2020-09-24 17:06:34,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 17:06:34,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:34,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 17:06:34,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:06:34,703 INFO L87 Difference]: Start difference. First operand 465 states and 563 transitions. Second operand 4 states. [2020-09-24 17:06:34,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:34,978 INFO L93 Difference]: Finished difference Result 824 states and 1023 transitions. [2020-09-24 17:06:34,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:06:34,978 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 167 [2020-09-24 17:06:34,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:34,984 INFO L225 Difference]: With dead ends: 824 [2020-09-24 17:06:34,985 INFO L226 Difference]: Without dead ends: 498 [2020-09-24 17:06:34,990 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 17:06:34,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-09-24 17:06:35,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 441. [2020-09-24 17:06:35,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-09-24 17:06:35,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 536 transitions. [2020-09-24 17:06:35,045 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 536 transitions. Word has length 167 [2020-09-24 17:06:35,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:35,046 INFO L479 AbstractCegarLoop]: Abstraction has 441 states and 536 transitions. [2020-09-24 17:06:35,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 17:06:35,046 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 536 transitions. [2020-09-24 17:06:35,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-09-24 17:06:35,051 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:35,051 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] [2020-09-24 17:06:35,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:06:35,052 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:35,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:35,052 INFO L82 PathProgramCache]: Analyzing trace with hash -2025816329, now seen corresponding path program 1 times [2020-09-24 17:06:35,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:35,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600664915] [2020-09-24 17:06:35,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:35,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:35,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:35,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:35,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:35,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:36,694 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:36,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-09-24 17:06:36,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 17:06:36,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1609 [2020-09-24 17:06:36,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:36,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:06:36,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 165 [2020-09-24 17:06:36,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 17:06:36,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:36,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:36,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:36,761 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:36,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:06:36,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:36,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:06:36,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:36,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:36,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:36,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:36,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:36,783 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 17:06:36,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600664915] [2020-09-24 17:06:36,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:06:36,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 17:06:36,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6401582] [2020-09-24 17:06:36,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 17:06:36,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:36,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 17:06:36,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:06:36,787 INFO L87 Difference]: Start difference. First operand 441 states and 536 transitions. Second operand 3 states. [2020-09-24 17:06:37,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:37,062 INFO L93 Difference]: Finished difference Result 815 states and 1044 transitions. [2020-09-24 17:06:37,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 17:06:37,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2020-09-24 17:06:37,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:37,067 INFO L225 Difference]: With dead ends: 815 [2020-09-24 17:06:37,068 INFO L226 Difference]: Without dead ends: 513 [2020-09-24 17:06:37,070 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 17:06:37,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2020-09-24 17:06:37,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 490. [2020-09-24 17:06:37,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-09-24 17:06:37,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 594 transitions. [2020-09-24 17:06:37,100 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 594 transitions. Word has length 172 [2020-09-24 17:06:37,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:37,100 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 594 transitions. [2020-09-24 17:06:37,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 17:06:37,101 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 594 transitions. [2020-09-24 17:06:37,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-09-24 17:06:37,104 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:37,104 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] [2020-09-24 17:06:37,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:06:37,105 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:37,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:37,105 INFO L82 PathProgramCache]: Analyzing trace with hash 502510231, now seen corresponding path program 1 times [2020-09-24 17:06:37,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:37,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99411393] [2020-09-24 17:06:37,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:37,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:37,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:37,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:37,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:37,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:38,652 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:38,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-09-24 17:06:38,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 17:06:38,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1515 [2020-09-24 17:06:38,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:38,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:06:38,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 165 [2020-09-24 17:06:38,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 17:06:38,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 17:06:38,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:38,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:38,691 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:38,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:06:38,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:38,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:06:38,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:38,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:38,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:38,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:38,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:38,710 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 17:06:38,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99411393] [2020-09-24 17:06:38,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:06:38,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 17:06:38,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114955482] [2020-09-24 17:06:38,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 17:06:38,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:38,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 17:06:38,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:06:38,715 INFO L87 Difference]: Start difference. First operand 490 states and 594 transitions. Second operand 3 states. [2020-09-24 17:06:38,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:38,985 INFO L93 Difference]: Finished difference Result 913 states and 1159 transitions. [2020-09-24 17:06:38,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 17:06:38,986 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2020-09-24 17:06:38,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:38,991 INFO L225 Difference]: With dead ends: 913 [2020-09-24 17:06:38,991 INFO L226 Difference]: Without dead ends: 562 [2020-09-24 17:06:38,994 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 17:06:38,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2020-09-24 17:06:39,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 529. [2020-09-24 17:06:39,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 529 states. [2020-09-24 17:06:39,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 650 transitions. [2020-09-24 17:06:39,012 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 650 transitions. Word has length 172 [2020-09-24 17:06:39,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:39,013 INFO L479 AbstractCegarLoop]: Abstraction has 529 states and 650 transitions. [2020-09-24 17:06:39,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 17:06:39,013 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 650 transitions. [2020-09-24 17:06:39,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-24 17:06:39,016 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:39,016 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, 1] [2020-09-24 17:06:39,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:06:39,017 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:39,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:39,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1172377495, now seen corresponding path program 1 times [2020-09-24 17:06:39,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:39,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874181915] [2020-09-24 17:06:39,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:39,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:39,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:39,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:39,524 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:39,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-09-24 17:06:39,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:06:39,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 477 [2020-09-24 17:06:39,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:39,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:06:39,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 17:06:39,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-09-24 17:06:39,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:39,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:39,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:39,620 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:39,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:06:39,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:39,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:06:39,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:39,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:39,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:39,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:39,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:06:39,658 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 17:06:39,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874181915] [2020-09-24 17:06:39,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:06:39,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 17:06:39,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171065316] [2020-09-24 17:06:39,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 17:06:39,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:39,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 17:06:39,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:06:39,662 INFO L87 Difference]: Start difference. First operand 529 states and 650 transitions. Second operand 6 states. [2020-09-24 17:06:39,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:39,903 INFO L93 Difference]: Finished difference Result 955 states and 1208 transitions. [2020-09-24 17:06:39,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:06:39,903 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 176 [2020-09-24 17:06:39,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:39,907 INFO L225 Difference]: With dead ends: 955 [2020-09-24 17:06:39,907 INFO L226 Difference]: Without dead ends: 565 [2020-09-24 17:06:39,909 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 17:06:39,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2020-09-24 17:06:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 554. [2020-09-24 17:06:39,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2020-09-24 17:06:39,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 680 transitions. [2020-09-24 17:06:39,935 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 680 transitions. Word has length 176 [2020-09-24 17:06:39,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:39,935 INFO L479 AbstractCegarLoop]: Abstraction has 554 states and 680 transitions. [2020-09-24 17:06:39,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 17:06:39,935 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 680 transitions. [2020-09-24 17:06:39,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-09-24 17:06:39,938 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:39,939 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:06:39,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 17:06:39,939 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:39,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:39,940 INFO L82 PathProgramCache]: Analyzing trace with hash -465696058, now seen corresponding path program 1 times [2020-09-24 17:06:39,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:39,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844161858] [2020-09-24 17:06:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:39,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:40,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:40,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:40,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:40,578 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:40,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-09-24 17:06:40,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:06:40,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 611 [2020-09-24 17:06:40,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:40,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:06:40,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 129 [2020-09-24 17:06:40,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 17:06:40,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 27 [2020-09-24 17:06:40,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:40,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:40,658 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:40,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:06:40,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:40,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:06:40,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:40,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:40,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:40,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:40,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:06:40,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844161858] [2020-09-24 17:06:40,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:06:40,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 17:06:40,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389886281] [2020-09-24 17:06:40,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 17:06:40,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:40,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 17:06:40,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:06:40,693 INFO L87 Difference]: Start difference. First operand 554 states and 680 transitions. Second operand 3 states. [2020-09-24 17:06:40,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:40,814 INFO L93 Difference]: Finished difference Result 985 states and 1234 transitions. [2020-09-24 17:06:40,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 17:06:40,815 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 201 [2020-09-24 17:06:40,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:40,820 INFO L225 Difference]: With dead ends: 985 [2020-09-24 17:06:40,820 INFO L226 Difference]: Without dead ends: 570 [2020-09-24 17:06:40,822 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 17:06:40,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-09-24 17:06:40,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2020-09-24 17:06:40,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 570 states. [2020-09-24 17:06:40,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 696 transitions. [2020-09-24 17:06:40,841 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 696 transitions. Word has length 201 [2020-09-24 17:06:40,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:40,842 INFO L479 AbstractCegarLoop]: Abstraction has 570 states and 696 transitions. [2020-09-24 17:06:40,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 17:06:40,842 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 696 transitions. [2020-09-24 17:06:40,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-09-24 17:06:40,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:40,848 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:06:40,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 17:06:40,849 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:40,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:40,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1625465716, now seen corresponding path program 1 times [2020-09-24 17:06:40,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:40,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075278431] [2020-09-24 17:06:40,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:40,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:40,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:41,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:41,167 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:41,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-09-24 17:06:41,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:06:41,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-09-24 17:06:41,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:41,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:06:41,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-09-24 17:06:41,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 17:06:41,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:41,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:41,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:41,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:41,213 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:41,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:06:41,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:41,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:06:41,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:41,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:41,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:41,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:41,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:06:41,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075278431] [2020-09-24 17:06:41,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:06:41,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 17:06:41,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918361807] [2020-09-24 17:06:41,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 17:06:41,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:41,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 17:06:41,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:06:41,250 INFO L87 Difference]: Start difference. First operand 570 states and 696 transitions. Second operand 3 states. [2020-09-24 17:06:41,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:41,517 INFO L93 Difference]: Finished difference Result 1065 states and 1355 transitions. [2020-09-24 17:06:41,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 17:06:41,518 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2020-09-24 17:06:41,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:41,522 INFO L225 Difference]: With dead ends: 1065 [2020-09-24 17:06:41,522 INFO L226 Difference]: Without dead ends: 638 [2020-09-24 17:06:41,525 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 17:06:41,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-09-24 17:06:41,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 623. [2020-09-24 17:06:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2020-09-24 17:06:41,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 765 transitions. [2020-09-24 17:06:41,553 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 765 transitions. Word has length 202 [2020-09-24 17:06:41,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:41,553 INFO L479 AbstractCegarLoop]: Abstraction has 623 states and 765 transitions. [2020-09-24 17:06:41,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 17:06:41,554 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 765 transitions. [2020-09-24 17:06:41,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-09-24 17:06:41,560 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:41,561 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:06:41,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 17:06:41,562 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:41,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:41,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1597515948, now seen corresponding path program 1 times [2020-09-24 17:06:41,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:41,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344158799] [2020-09-24 17:06:41,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:41,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:41,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:42,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:42,265 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:42,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-09-24 17:06:42,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:06:42,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 665 [2020-09-24 17:06:42,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:42,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:06:42,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-09-24 17:06:42,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-24 17:06:42,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:42,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:42,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:42,332 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:42,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:06:42,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:42,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:06:42,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:42,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:42,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:42,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:42,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:06:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:06:42,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344158799] [2020-09-24 17:06:42,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:06:42,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 17:06:42,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477227494] [2020-09-24 17:06:42,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 17:06:42,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:42,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 17:06:42,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:06:42,404 INFO L87 Difference]: Start difference. First operand 623 states and 765 transitions. Second operand 3 states. [2020-09-24 17:06:42,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:42,635 INFO L93 Difference]: Finished difference Result 1538 states and 1956 transitions. [2020-09-24 17:06:42,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 17:06:42,636 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 210 [2020-09-24 17:06:42,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:42,648 INFO L225 Difference]: With dead ends: 1538 [2020-09-24 17:06:42,648 INFO L226 Difference]: Without dead ends: 1070 [2020-09-24 17:06:42,651 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 17:06:42,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2020-09-24 17:06:42,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 1068. [2020-09-24 17:06:42,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-09-24 17:06:42,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1328 transitions. [2020-09-24 17:06:42,700 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1328 transitions. Word has length 210 [2020-09-24 17:06:42,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:42,701 INFO L479 AbstractCegarLoop]: Abstraction has 1068 states and 1328 transitions. [2020-09-24 17:06:42,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 17:06:42,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1328 transitions. [2020-09-24 17:06:42,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-09-24 17:06:42,708 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:42,709 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] [2020-09-24 17:06:42,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 17:06:42,709 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:42,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:42,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1924666477, now seen corresponding path program 1 times [2020-09-24 17:06:42,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:42,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943940745] [2020-09-24 17:06:42,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:42,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:42,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:42,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:43,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:43,689 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:43,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 222 [2020-09-24 17:06:43,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:06:43,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 937 [2020-09-24 17:06:43,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:43,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:06:43,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-09-24 17:06:43,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 17:06:43,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:43,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:43,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:43,737 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:43,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:06:43,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:43,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:06:43,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:43,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:43,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:43,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:43,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:43,772 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 17:06:43,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943940745] [2020-09-24 17:06:43,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:06:43,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 17:06:43,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382533203] [2020-09-24 17:06:43,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 17:06:43,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:43,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 17:06:43,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:06:43,780 INFO L87 Difference]: Start difference. First operand 1068 states and 1328 transitions. Second operand 4 states. [2020-09-24 17:06:44,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:44,287 INFO L93 Difference]: Finished difference Result 3018 states and 3862 transitions. [2020-09-24 17:06:44,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:06:44,288 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 213 [2020-09-24 17:06:44,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:44,303 INFO L225 Difference]: With dead ends: 3018 [2020-09-24 17:06:44,303 INFO L226 Difference]: Without dead ends: 2081 [2020-09-24 17:06:44,307 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 17:06:44,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2020-09-24 17:06:44,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 1074. [2020-09-24 17:06:44,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1074 states. [2020-09-24 17:06:44,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1334 transitions. [2020-09-24 17:06:44,363 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1334 transitions. Word has length 213 [2020-09-24 17:06:44,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:44,364 INFO L479 AbstractCegarLoop]: Abstraction has 1074 states and 1334 transitions. [2020-09-24 17:06:44,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 17:06:44,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1334 transitions. [2020-09-24 17:06:44,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-09-24 17:06:44,369 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:44,370 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 17:06:44,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 17:06:44,370 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:44,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:44,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1305865704, now seen corresponding path program 1 times [2020-09-24 17:06:44,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:44,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527895275] [2020-09-24 17:06:44,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:44,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:44,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:44,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:44,814 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:44,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-09-24 17:06:44,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:06:44,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-09-24 17:06:44,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:44,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:06:44,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 192 [2020-09-24 17:06:44,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 17:06:44,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:44,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:44,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:44,853 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:44,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:06:44,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:44,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:06:44,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:44,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:44,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:44,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:44,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:06:44,889 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 17:06:44,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527895275] [2020-09-24 17:06:44,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:06:44,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 17:06:44,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941928838] [2020-09-24 17:06:44,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 17:06:44,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:44,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 17:06:44,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:06:44,892 INFO L87 Difference]: Start difference. First operand 1074 states and 1334 transitions. Second operand 3 states. [2020-09-24 17:06:45,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:45,114 INFO L93 Difference]: Finished difference Result 2086 states and 2625 transitions. [2020-09-24 17:06:45,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 17:06:45,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 230 [2020-09-24 17:06:45,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:45,121 INFO L225 Difference]: With dead ends: 2086 [2020-09-24 17:06:45,122 INFO L226 Difference]: Without dead ends: 1167 [2020-09-24 17:06:45,124 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 17:06:45,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2020-09-24 17:06:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1136. [2020-09-24 17:06:45,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1136 states. [2020-09-24 17:06:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1408 transitions. [2020-09-24 17:06:45,170 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1408 transitions. Word has length 230 [2020-09-24 17:06:45,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:45,171 INFO L479 AbstractCegarLoop]: Abstraction has 1136 states and 1408 transitions. [2020-09-24 17:06:45,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 17:06:45,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1408 transitions. [2020-09-24 17:06:45,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-09-24 17:06:45,179 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:45,180 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, 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 17:06:45,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 17:06:45,180 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:45,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:45,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1307505792, now seen corresponding path program 1 times [2020-09-24 17:06:45,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:45,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302258605] [2020-09-24 17:06:45,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:45,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:45,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:45,499 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:45,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-09-24 17:06:45,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:06:45,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-09-24 17:06:45,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:45,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:06:45,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-09-24 17:06:45,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 17:06:45,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:45,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:45,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:45,539 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:45,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:06:45,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:45,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:06:45,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:45,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:45,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:45,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:45,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-24 17:06:45,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302258605] [2020-09-24 17:06:45,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:06:45,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 17:06:45,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041484156] [2020-09-24 17:06:45,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 17:06:45,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:45,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 17:06:45,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:06:45,596 INFO L87 Difference]: Start difference. First operand 1136 states and 1408 transitions. Second operand 3 states. [2020-09-24 17:06:45,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:45,831 INFO L93 Difference]: Finished difference Result 2194 states and 2766 transitions. [2020-09-24 17:06:45,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 17:06:45,831 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 236 [2020-09-24 17:06:45,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:45,837 INFO L225 Difference]: With dead ends: 2194 [2020-09-24 17:06:45,838 INFO L226 Difference]: Without dead ends: 1213 [2020-09-24 17:06:45,840 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 17:06:45,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2020-09-24 17:06:45,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1192. [2020-09-24 17:06:45,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2020-09-24 17:06:45,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1474 transitions. [2020-09-24 17:06:45,876 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1474 transitions. Word has length 236 [2020-09-24 17:06:45,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:45,877 INFO L479 AbstractCegarLoop]: Abstraction has 1192 states and 1474 transitions. [2020-09-24 17:06:45,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 17:06:45,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1474 transitions. [2020-09-24 17:06:45,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-09-24 17:06:45,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:45,883 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, 1, 1, 1, 1, 1, 1] [2020-09-24 17:06:45,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 17:06:45,883 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:45,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:45,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1647539560, now seen corresponding path program 1 times [2020-09-24 17:06:45,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:45,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154212628] [2020-09-24 17:06:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:45,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:46,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:46,365 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:46,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-09-24 17:06:46,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:06:46,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-09-24 17:06:46,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:46,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:06:46,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 192 [2020-09-24 17:06:46,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-24 17:06:46,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:06:46,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:46,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:46,444 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:46,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:06:46,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:46,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:06:46,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:46,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:46,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:46,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:46,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:06:46,519 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 17:06:46,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154212628] [2020-09-24 17:06:46,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:06:46,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 17:06:46,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111970610] [2020-09-24 17:06:46,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 17:06:46,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:46,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 17:06:46,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:06:46,522 INFO L87 Difference]: Start difference. First operand 1192 states and 1474 transitions. Second operand 4 states. [2020-09-24 17:06:47,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:47,070 INFO L93 Difference]: Finished difference Result 3356 states and 4266 transitions. [2020-09-24 17:06:47,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:06:47,071 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 238 [2020-09-24 17:06:47,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:47,084 INFO L225 Difference]: With dead ends: 3356 [2020-09-24 17:06:47,085 INFO L226 Difference]: Without dead ends: 2319 [2020-09-24 17:06:47,088 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 17:06:47,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2020-09-24 17:06:47,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1198. [2020-09-24 17:06:47,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1198 states. [2020-09-24 17:06:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1480 transitions. [2020-09-24 17:06:47,147 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1480 transitions. Word has length 238 [2020-09-24 17:06:47,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:47,148 INFO L479 AbstractCegarLoop]: Abstraction has 1198 states and 1480 transitions. [2020-09-24 17:06:47,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 17:06:47,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1480 transitions. [2020-09-24 17:06:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-09-24 17:06:47,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:47,154 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, 1, 1, 1, 1, 1, 1] [2020-09-24 17:06:47,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 17:06:47,154 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:47,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:47,155 INFO L82 PathProgramCache]: Analyzing trace with hash -506237496, now seen corresponding path program 1 times [2020-09-24 17:06:47,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:47,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803449330] [2020-09-24 17:06:47,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:47,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:47,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:47,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:47,821 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:47,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-09-24 17:06:47,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:06:47,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 639 [2020-09-24 17:06:47,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:47,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:06:47,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 192 [2020-09-24 17:06:47,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-24 17:06:47,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:47,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:47,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:47,879 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:47,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:06:47,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:47,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:06:47,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:47,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:47,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:47,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:47,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:06:47,931 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 17:06:47,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803449330] [2020-09-24 17:06:47,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:06:47,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 17:06:47,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656974228] [2020-09-24 17:06:47,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 17:06:47,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:47,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 17:06:47,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:06:47,934 INFO L87 Difference]: Start difference. First operand 1198 states and 1480 transitions. Second operand 4 states. [2020-09-24 17:06:48,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:48,443 INFO L93 Difference]: Finished difference Result 3420 states and 4328 transitions. [2020-09-24 17:06:48,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:06:48,444 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 238 [2020-09-24 17:06:48,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:48,458 INFO L225 Difference]: With dead ends: 3420 [2020-09-24 17:06:48,459 INFO L226 Difference]: Without dead ends: 2353 [2020-09-24 17:06:48,470 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 17:06:48,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2020-09-24 17:06:48,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 1238. [2020-09-24 17:06:48,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1238 states. [2020-09-24 17:06:48,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 1542 transitions. [2020-09-24 17:06:48,526 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 1542 transitions. Word has length 238 [2020-09-24 17:06:48,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:48,527 INFO L479 AbstractCegarLoop]: Abstraction has 1238 states and 1542 transitions. [2020-09-24 17:06:48,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 17:06:48,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 1542 transitions. [2020-09-24 17:06:48,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-09-24 17:06:48,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:48,534 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, 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 17:06:48,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 17:06:48,534 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:48,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:48,535 INFO L82 PathProgramCache]: Analyzing trace with hash -460241056, now seen corresponding path program 1 times [2020-09-24 17:06:48,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:48,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047967944] [2020-09-24 17:06:48,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:48,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:48,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:49,114 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:49,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-09-24 17:06:49,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:06:49,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 549 [2020-09-24 17:06:49,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:49,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:06:49,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-09-24 17:06:49,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 17:06:49,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:49,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:49,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:49,171 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:49,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:06:49,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:49,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:06:49,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:49,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:49,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:49,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:49,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:06:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-24 17:06:49,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047967944] [2020-09-24 17:06:49,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:06:49,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 17:06:49,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923553225] [2020-09-24 17:06:49,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 17:06:49,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:49,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 17:06:49,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:06:49,257 INFO L87 Difference]: Start difference. First operand 1238 states and 1542 transitions. Second operand 4 states. [2020-09-24 17:06:49,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:49,694 INFO L93 Difference]: Finished difference Result 3426 states and 4334 transitions. [2020-09-24 17:06:49,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:06:49,695 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 244 [2020-09-24 17:06:49,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:49,711 INFO L225 Difference]: With dead ends: 3426 [2020-09-24 17:06:49,712 INFO L226 Difference]: Without dead ends: 2343 [2020-09-24 17:06:49,717 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 17:06:49,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2020-09-24 17:06:49,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 1244. [2020-09-24 17:06:49,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1244 states. [2020-09-24 17:06:49,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1548 transitions. [2020-09-24 17:06:49,799 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1548 transitions. Word has length 244 [2020-09-24 17:06:49,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:49,800 INFO L479 AbstractCegarLoop]: Abstraction has 1244 states and 1548 transitions. [2020-09-24 17:06:49,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 17:06:49,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1548 transitions. [2020-09-24 17:06:49,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-09-24 17:06:49,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:49,808 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:06:49,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 17:06:49,809 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:49,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:49,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1942342335, now seen corresponding path program 1 times [2020-09-24 17:06:49,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:49,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81469026] [2020-09-24 17:06:49,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:49,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:50,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:50,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:50,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:50,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:50,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:50,724 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:50,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 258 [2020-09-24 17:06:50,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 17:06:50,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 874 [2020-09-24 17:06:50,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:50,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:06:50,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 192 [2020-09-24 17:06:50,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 17:06:50,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:06:50,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:50,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:50,774 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:50,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:06:50,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:50,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:06:50,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:50,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:50,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:50,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:50,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 17:06:50,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81469026] [2020-09-24 17:06:50,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:06:50,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 17:06:50,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468020475] [2020-09-24 17:06:50,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 17:06:50,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:50,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 17:06:50,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:06:50,817 INFO L87 Difference]: Start difference. First operand 1244 states and 1548 transitions. Second operand 3 states. [2020-09-24 17:06:51,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:51,063 INFO L93 Difference]: Finished difference Result 2459 states and 3087 transitions. [2020-09-24 17:06:51,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 17:06:51,064 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 249 [2020-09-24 17:06:51,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:51,071 INFO L225 Difference]: With dead ends: 2459 [2020-09-24 17:06:51,071 INFO L226 Difference]: Without dead ends: 1370 [2020-09-24 17:06:51,074 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 17:06:51,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2020-09-24 17:06:51,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1340. [2020-09-24 17:06:51,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1340 states. [2020-09-24 17:06:51,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 1656 transitions. [2020-09-24 17:06:51,119 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 1656 transitions. Word has length 249 [2020-09-24 17:06:51,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:51,119 INFO L479 AbstractCegarLoop]: Abstraction has 1340 states and 1656 transitions. [2020-09-24 17:06:51,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 17:06:51,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 1656 transitions. [2020-09-24 17:06:51,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-09-24 17:06:51,125 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:51,126 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:06:51,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 17:06:51,126 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:51,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:51,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1156374817, now seen corresponding path program 1 times [2020-09-24 17:06:51,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:51,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174919999] [2020-09-24 17:06:51,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:51,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:51,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:51,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:51,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:51,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:51,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:52,534 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:52,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 266 [2020-09-24 17:06:52,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 17:06:52,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1378 [2020-09-24 17:06:52,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:52,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:06:52,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 192 [2020-09-24 17:06:52,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-24 17:06:52,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:06:52,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:52,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:52,618 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:52,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:06:52,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:52,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:06:52,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:52,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:52,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:52,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:52,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:06:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 17:06:52,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174919999] [2020-09-24 17:06:52,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:06:52,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 17:06:52,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118222284] [2020-09-24 17:06:52,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:06:52,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:52,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:06:52,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:06:52,697 INFO L87 Difference]: Start difference. First operand 1340 states and 1656 transitions. Second operand 5 states. [2020-09-24 17:06:53,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:53,398 INFO L93 Difference]: Finished difference Result 4002 states and 4976 transitions. [2020-09-24 17:06:53,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 17:06:53,399 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 257 [2020-09-24 17:06:53,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:53,413 INFO L225 Difference]: With dead ends: 4002 [2020-09-24 17:06:53,413 INFO L226 Difference]: Without dead ends: 2817 [2020-09-24 17:06:53,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-24 17:06:53,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2020-09-24 17:06:53,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 1402. [2020-09-24 17:06:53,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1402 states. [2020-09-24 17:06:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 1732 transitions. [2020-09-24 17:06:53,472 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 1732 transitions. Word has length 257 [2020-09-24 17:06:53,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:53,473 INFO L479 AbstractCegarLoop]: Abstraction has 1402 states and 1732 transitions. [2020-09-24 17:06:53,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:06:53,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 1732 transitions. [2020-09-24 17:06:53,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-09-24 17:06:53,479 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:53,479 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:06:53,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 17:06:53,480 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:53,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:53,480 INFO L82 PathProgramCache]: Analyzing trace with hash 684578060, now seen corresponding path program 1 times [2020-09-24 17:06:53,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:53,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426173907] [2020-09-24 17:06:53,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:53,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:53,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:53,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:53,910 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:53,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-09-24 17:06:53,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:06:53,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 401 [2020-09-24 17:06:53,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:53,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:06:53,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 222 [2020-09-24 17:06:53,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 17:06:53,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:53,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:53,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:53,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:53,956 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:53,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:06:53,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:53,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:06:53,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:53,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:53,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:53,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:53,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-09-24 17:06:53,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426173907] [2020-09-24 17:06:54,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:06:54,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 17:06:54,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808009347] [2020-09-24 17:06:54,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 17:06:54,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:54,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 17:06:54,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:06:54,002 INFO L87 Difference]: Start difference. First operand 1402 states and 1732 transitions. Second operand 3 states. [2020-09-24 17:06:54,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:54,298 INFO L93 Difference]: Finished difference Result 2914 states and 3660 transitions. [2020-09-24 17:06:54,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 17:06:54,299 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 260 [2020-09-24 17:06:54,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:54,309 INFO L225 Difference]: With dead ends: 2914 [2020-09-24 17:06:54,310 INFO L226 Difference]: Without dead ends: 1631 [2020-09-24 17:06:54,316 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 17:06:54,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2020-09-24 17:06:54,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1468. [2020-09-24 17:06:54,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1468 states. [2020-09-24 17:06:54,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 1814 transitions. [2020-09-24 17:06:54,386 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 1814 transitions. Word has length 260 [2020-09-24 17:06:54,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:54,387 INFO L479 AbstractCegarLoop]: Abstraction has 1468 states and 1814 transitions. [2020-09-24 17:06:54,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 17:06:54,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 1814 transitions. [2020-09-24 17:06:54,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2020-09-24 17:06:54,393 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:54,394 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:06:54,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 17:06:54,394 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:54,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:54,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1871966444, now seen corresponding path program 1 times [2020-09-24 17:06:54,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:54,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336208474] [2020-09-24 17:06:54,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:54,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:54,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:54,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:54,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:55,675 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:55,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 277 [2020-09-24 17:06:55,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:06:55,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1239 [2020-09-24 17:06:55,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:55,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:06:55,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 222 [2020-09-24 17:06:55,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-24 17:06:55,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:55,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:55,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:55,728 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:55,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:06:55,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:55,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:06:55,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:55,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:55,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:55,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:55,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-09-24 17:06:55,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336208474] [2020-09-24 17:06:55,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:06:55,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 17:06:55,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023436576] [2020-09-24 17:06:55,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 17:06:55,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:55,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 17:06:55,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:06:55,781 INFO L87 Difference]: Start difference. First operand 1468 states and 1814 transitions. Second operand 4 states. [2020-09-24 17:06:56,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:56,173 INFO L93 Difference]: Finished difference Result 4228 states and 5302 transitions. [2020-09-24 17:06:56,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:06:56,174 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 268 [2020-09-24 17:06:56,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:56,187 INFO L225 Difference]: With dead ends: 4228 [2020-09-24 17:06:56,187 INFO L226 Difference]: Without dead ends: 2915 [2020-09-24 17:06:56,192 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 17:06:56,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2915 states. [2020-09-24 17:06:56,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2915 to 1474. [2020-09-24 17:06:56,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1474 states. [2020-09-24 17:06:56,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 1816 transitions. [2020-09-24 17:06:56,248 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 1816 transitions. Word has length 268 [2020-09-24 17:06:56,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:56,248 INFO L479 AbstractCegarLoop]: Abstraction has 1474 states and 1816 transitions. [2020-09-24 17:06:56,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 17:06:56,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 1816 transitions. [2020-09-24 17:06:56,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-09-24 17:06:56,254 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:56,255 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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 17:06:56,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 17:06:56,255 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:56,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:56,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1995542093, now seen corresponding path program 1 times [2020-09-24 17:06:56,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:56,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528578624] [2020-09-24 17:06:56,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:56,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:56,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:56,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:56,845 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:56,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-09-24 17:06:56,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:06:56,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 564 [2020-09-24 17:06:56,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:56,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:06:56,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 192 [2020-09-24 17:06:56,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-24 17:06:56,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:56,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:56,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:56,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:56,902 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:56,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:06:56,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:56,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:06:56,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:56,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:56,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:56,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:56,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-09-24 17:06:56,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528578624] [2020-09-24 17:06:56,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:06:56,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 17:06:56,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892559795] [2020-09-24 17:06:56,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 17:06:56,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:56,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 17:06:56,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:06:56,974 INFO L87 Difference]: Start difference. First operand 1474 states and 1816 transitions. Second operand 4 states. [2020-09-24 17:06:57,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:57,342 INFO L93 Difference]: Finished difference Result 4104 states and 5106 transitions. [2020-09-24 17:06:57,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:06:57,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 269 [2020-09-24 17:06:57,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:57,366 INFO L225 Difference]: With dead ends: 4104 [2020-09-24 17:06:57,371 INFO L226 Difference]: Without dead ends: 2785 [2020-09-24 17:06:57,376 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 17:06:57,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2020-09-24 17:06:57,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 1440. [2020-09-24 17:06:57,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1440 states. [2020-09-24 17:06:57,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 1760 transitions. [2020-09-24 17:06:57,428 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 1760 transitions. Word has length 269 [2020-09-24 17:06:57,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:57,429 INFO L479 AbstractCegarLoop]: Abstraction has 1440 states and 1760 transitions. [2020-09-24 17:06:57,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 17:06:57,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 1760 transitions. [2020-09-24 17:06:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-09-24 17:06:57,436 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:57,436 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:06:57,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 17:06:57,437 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:57,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:57,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1016088371, now seen corresponding path program 1 times [2020-09-24 17:06:57,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:57,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663423008] [2020-09-24 17:06:57,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:57,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:57,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:57,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:57,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:58,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:58,679 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:58,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 305 [2020-09-24 17:06:58,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 17:06:58,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1210 [2020-09-24 17:06:58,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:58,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:06:58,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 189 [2020-09-24 17:06:58,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-09-24 17:06:58,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:58,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:58,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:58,742 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:58,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:06:58,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:58,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:06:58,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:58,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:58,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:58,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:58,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-09-24 17:06:58,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663423008] [2020-09-24 17:06:58,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:06:58,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 17:06:58,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693579834] [2020-09-24 17:06:58,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 17:06:58,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:58,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 17:06:58,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:06:58,808 INFO L87 Difference]: Start difference. First operand 1440 states and 1760 transitions. Second operand 3 states. [2020-09-24 17:06:58,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:58,991 INFO L93 Difference]: Finished difference Result 3356 states and 4162 transitions. [2020-09-24 17:06:58,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 17:06:58,992 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 296 [2020-09-24 17:06:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:59,001 INFO L225 Difference]: With dead ends: 3356 [2020-09-24 17:06:59,001 INFO L226 Difference]: Without dead ends: 2071 [2020-09-24 17:06:59,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:06:59,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2020-09-24 17:06:59,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 2069. [2020-09-24 17:06:59,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2069 states. [2020-09-24 17:06:59,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 2536 transitions. [2020-09-24 17:06:59,060 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 2536 transitions. Word has length 296 [2020-09-24 17:06:59,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:59,061 INFO L479 AbstractCegarLoop]: Abstraction has 2069 states and 2536 transitions. [2020-09-24 17:06:59,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 17:06:59,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 2536 transitions. [2020-09-24 17:06:59,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-09-24 17:06:59,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:59,067 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:06:59,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-24 17:06:59,067 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:59,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:59,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1817763305, now seen corresponding path program 1 times [2020-09-24 17:06:59,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:59,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804020913] [2020-09-24 17:06:59,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:59,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:59,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:59,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:59,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:59,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:00,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:00,927 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:07:00,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-09-24 17:07:00,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 17:07:00,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1830 [2020-09-24 17:07:00,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:07:00,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:07:00,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 257 [2020-09-24 17:07:00,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-24 17:07:00,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:07:00,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:07:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:07:00,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:00,991 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:07:00,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:07:00,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:07:00,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:07:00,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:07:00,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:07:00,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:07:00,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:07:00,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:07:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-09-24 17:07:01,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804020913] [2020-09-24 17:07:01,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:07:01,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 17:07:01,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167720339] [2020-09-24 17:07:01,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 17:07:01,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:07:01,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 17:07:01,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:07:01,044 INFO L87 Difference]: Start difference. First operand 2069 states and 2536 transitions. Second operand 3 states. [2020-09-24 17:07:01,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:07:01,276 INFO L93 Difference]: Finished difference Result 4179 states and 5167 transitions. [2020-09-24 17:07:01,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 17:07:01,276 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 298 [2020-09-24 17:07:01,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:07:01,286 INFO L225 Difference]: With dead ends: 4179 [2020-09-24 17:07:01,287 INFO L226 Difference]: Without dead ends: 2265 [2020-09-24 17:07:01,297 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 17:07:01,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2020-09-24 17:07:01,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 2174. [2020-09-24 17:07:01,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2174 states. [2020-09-24 17:07:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 2659 transitions. [2020-09-24 17:07:01,352 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 2659 transitions. Word has length 298 [2020-09-24 17:07:01,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:07:01,352 INFO L479 AbstractCegarLoop]: Abstraction has 2174 states and 2659 transitions. [2020-09-24 17:07:01,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 17:07:01,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 2659 transitions. [2020-09-24 17:07:01,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-09-24 17:07:01,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:07:01,358 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:07:01,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-24 17:07:01,359 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:07:01,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:07:01,359 INFO L82 PathProgramCache]: Analyzing trace with hash 475622435, now seen corresponding path program 1 times [2020-09-24 17:07:01,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:07:01,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833447619] [2020-09-24 17:07:01,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:07:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:07:01,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:01,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:01,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:01,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:02,090 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:07:02,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 310 [2020-09-24 17:07:02,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:07:02,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 701 [2020-09-24 17:07:02,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:07:02,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 17:07:02,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 250 [2020-09-24 17:07:02,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 17:07:02,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:07:02,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:07:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:07:02,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:02,191 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:07:02,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:07:02,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:07:02,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:07:02,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:07:02,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:07:02,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:07:02,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:07:02,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:07:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-09-24 17:07:02,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833447619] [2020-09-24 17:07:02,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:07:02,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 17:07:02,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503190833] [2020-09-24 17:07:02,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 17:07:02,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:07:02,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 17:07:02,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:07:02,283 INFO L87 Difference]: Start difference. First operand 2174 states and 2659 transitions. Second operand 4 states. [2020-09-24 17:07:02,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:07:02,566 INFO L93 Difference]: Finished difference Result 4460 states and 5477 transitions. [2020-09-24 17:07:02,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:07:02,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 301 [2020-09-24 17:07:02,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:07:02,573 INFO L225 Difference]: With dead ends: 4460 [2020-09-24 17:07:02,573 INFO L226 Difference]: Without dead ends: 2366 [2020-09-24 17:07:02,578 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 17:07:02,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2366 states. [2020-09-24 17:07:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2366 to 2256. [2020-09-24 17:07:02,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2256 states. [2020-09-24 17:07:02,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 2760 transitions. [2020-09-24 17:07:02,642 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 2760 transitions. Word has length 301 [2020-09-24 17:07:02,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:07:02,642 INFO L479 AbstractCegarLoop]: Abstraction has 2256 states and 2760 transitions. [2020-09-24 17:07:02,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 17:07:02,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 2760 transitions. [2020-09-24 17:07:02,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-09-24 17:07:02,649 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:07:02,649 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:07:02,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-24 17:07:02,650 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:07:02,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:07:02,650 INFO L82 PathProgramCache]: Analyzing trace with hash -932023748, now seen corresponding path program 1 times [2020-09-24 17:07:02,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:07:02,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905079025] [2020-09-24 17:07:02,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:07:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:07:02,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:02,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:02,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:03,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:03,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:03,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:03,789 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:07:03,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-09-24 17:07:03,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 17:07:03,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1104 [2020-09-24 17:07:03,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:07:03,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:07:03,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 241 [2020-09-24 17:07:03,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 17:07:03,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:07:03,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:07:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:07:03,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:03,853 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:07:03,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:07:03,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:07:03,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:07:03,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:07:03,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:07:03,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:07:03,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:07:03,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:07:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-09-24 17:07:03,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905079025] [2020-09-24 17:07:03,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:07:03,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 17:07:03,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939113270] [2020-09-24 17:07:03,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 17:07:03,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:07:03,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 17:07:03,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:07:03,939 INFO L87 Difference]: Start difference. First operand 2256 states and 2760 transitions. Second operand 3 states. [2020-09-24 17:07:04,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:07:04,211 INFO L93 Difference]: Finished difference Result 4834 states and 5907 transitions. [2020-09-24 17:07:04,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 17:07:04,212 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 302 [2020-09-24 17:07:04,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:07:04,217 INFO L225 Difference]: With dead ends: 4834 [2020-09-24 17:07:04,217 INFO L226 Difference]: Without dead ends: 2730 [2020-09-24 17:07:04,223 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 17:07:04,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2730 states. [2020-09-24 17:07:04,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2730 to 2388. [2020-09-24 17:07:04,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2388 states. [2020-09-24 17:07:04,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 2913 transitions. [2020-09-24 17:07:04,286 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 2913 transitions. Word has length 302 [2020-09-24 17:07:04,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:07:04,287 INFO L479 AbstractCegarLoop]: Abstraction has 2388 states and 2913 transitions. [2020-09-24 17:07:04,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 17:07:04,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 2913 transitions. [2020-09-24 17:07:04,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-09-24 17:07:04,293 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:07:04,293 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:07:04,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-24 17:07:04,294 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:07:04,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:07:04,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1063802982, now seen corresponding path program 1 times [2020-09-24 17:07:04,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:07:04,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818267318] [2020-09-24 17:07:04,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:07:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:07:04,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:04,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:04,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:04,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:04,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:06,137 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:07:06,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 314 [2020-09-24 17:07:06,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 17:07:06,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1813 [2020-09-24 17:07:06,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:07:06,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 17:07:06,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 257 [2020-09-24 17:07:06,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-24 17:07:06,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:07:06,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:07:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:07:06,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:06,184 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:07:06,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:07:06,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:07:06,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:07:06,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:07:06,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:07:06,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:07:06,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:07:06,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:07:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 86 proven. 4 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-09-24 17:07:06,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818267318] [2020-09-24 17:07:06,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:07:06,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-24 17:07:06,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937291641] [2020-09-24 17:07:06,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 17:07:06,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:07:06,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 17:07:06,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:07:06,222 INFO L87 Difference]: Start difference. First operand 2388 states and 2913 transitions. Second operand 4 states. [2020-09-24 17:07:06,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:07:06,604 INFO L93 Difference]: Finished difference Result 6225 states and 7689 transitions. [2020-09-24 17:07:06,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:07:06,604 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 305 [2020-09-24 17:07:06,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:07:06,614 INFO L225 Difference]: With dead ends: 6225 [2020-09-24 17:07:06,614 INFO L226 Difference]: Without dead ends: 3809 [2020-09-24 17:07:06,619 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 17:07:06,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3809 states. [2020-09-24 17:07:06,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3809 to 3205. [2020-09-24 17:07:06,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3205 states. [2020-09-24 17:07:06,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3205 states to 3205 states and 3929 transitions. [2020-09-24 17:07:06,702 INFO L78 Accepts]: Start accepts. Automaton has 3205 states and 3929 transitions. Word has length 305 [2020-09-24 17:07:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:07:06,702 INFO L479 AbstractCegarLoop]: Abstraction has 3205 states and 3929 transitions. [2020-09-24 17:07:06,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 17:07:06,703 INFO L276 IsEmpty]: Start isEmpty. Operand 3205 states and 3929 transitions. [2020-09-24 17:07:06,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-09-24 17:07:06,710 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:07:06,711 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:07:06,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-24 17:07:06,711 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:07:06,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:07:06,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1252116489, now seen corresponding path program 1 times [2020-09-24 17:07:06,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:07:06,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257401917] [2020-09-24 17:07:06,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:07:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:07:06,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:06,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:06,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:07,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:07,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:08,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:08,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:11,728 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:07:11,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-09-24 17:07:11,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 17:07:11,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4982 [2020-09-24 17:07:11,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:07:11,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:07:11,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 257 [2020-09-24 17:07:11,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 17:07:11,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:07:11,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:07:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:07:11,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:07:11,780 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:07:11,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:07:11,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:07:11,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:07:11,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:07:11,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:07:11,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:07:11,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:07:11,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0