/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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 23:51:29,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 23:51:29,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 23:51:29,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 23:51:29,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 23:51:29,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 23:51:29,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 23:51:29,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 23:51:29,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 23:51:29,310 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 23:51:29,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 23:51:29,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 23:51:29,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 23:51:29,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 23:51:29,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 23:51:29,320 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 23:51:29,322 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 23:51:29,323 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 23:51:29,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 23:51:29,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 23:51:29,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 23:51:29,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 23:51:29,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 23:51:29,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 23:51:29,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 23:51:29,342 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 23:51:29,342 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 23:51:29,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 23:51:29,344 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 23:51:29,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 23:51:29,345 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 23:51:29,346 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 23:51:29,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 23:51:29,347 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 23:51:29,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 23:51:29,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 23:51:29,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 23:51:29,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 23:51:29,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 23:51:29,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 23:51:29,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 23:51:29,353 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 23:51:29,379 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 23:51:29,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 23:51:29,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 23:51:29,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 23:51:29,381 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 23:51:29,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 23:51:29,381 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 23:51:29,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 23:51:29,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 23:51:29,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 23:51:29,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 23:51:29,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 23:51:29,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 23:51:29,383 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 23:51:29,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 23:51:29,383 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 23:51:29,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 23:51:29,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 23:51:29,384 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 23:51:29,384 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 23:51:29,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 23:51:29,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 23:51:29,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 23:51:29,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 23:51:29,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 23:51:29,385 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 23:51:29,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 23:51:29,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 23:51:29,385 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 23:51:29,386 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;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;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;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;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;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;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;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;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;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-09-24 23:51:29,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 23:51:29,871 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 23:51:29,875 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 23:51:29,876 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 23:51:29,877 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 23:51:29,878 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-1.c [2020-09-24 23:51:29,958 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11258553e/65f9775e2bd54bc18ce38a3ce9efcc21/FLAG33c0aafce [2020-09-24 23:51:30,472 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 23:51:30,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-1.c [2020-09-24 23:51:30,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11258553e/65f9775e2bd54bc18ce38a3ce9efcc21/FLAG33c0aafce [2020-09-24 23:51:30,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11258553e/65f9775e2bd54bc18ce38a3ce9efcc21 [2020-09-24 23:51:30,834 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 23:51:30,840 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 23:51:30,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 23:51:30,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 23:51:30,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 23:51:30,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:51:30" (1/1) ... [2020-09-24 23:51:30,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72ab055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:30, skipping insertion in model container [2020-09-24 23:51:30,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:51:30" (1/1) ... [2020-09-24 23:51:30,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 23:51:30,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 23:51:31,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 23:51:31,172 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 23:51:31,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 23:51:31,221 INFO L208 MainTranslator]: Completed translation [2020-09-24 23:51:31,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:31 WrapperNode [2020-09-24 23:51:31,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 23:51:31,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 23:51:31,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 23:51:31,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 23:51:31,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:31" (1/1) ... [2020-09-24 23:51:31,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:31" (1/1) ... [2020-09-24 23:51:31,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:31" (1/1) ... [2020-09-24 23:51:31,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:31" (1/1) ... [2020-09-24 23:51:31,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:31" (1/1) ... [2020-09-24 23:51:31,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:31" (1/1) ... [2020-09-24 23:51:31,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:31" (1/1) ... [2020-09-24 23:51:31,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 23:51:31,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 23:51:31,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 23:51:31,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 23:51:31,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:31" (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 23:51:31,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 23:51:31,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 23:51:31,490 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-24 23:51:31,491 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 23:51:31,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 23:51:31,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 23:51:31,492 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 23:51:31,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 23:51:31,493 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 23:51:31,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 23:51:31,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 23:51:31,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 23:51:31,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 23:51:31,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 23:51:31,761 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 23:51:31,761 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 23:51:31,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:51:31 BoogieIcfgContainer [2020-09-24 23:51:31,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 23:51:31,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 23:51:31,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 23:51:31,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 23:51:31,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:51:30" (1/3) ... [2020-09-24 23:51:31,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@492ed2a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:51:31, skipping insertion in model container [2020-09-24 23:51:31,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:31" (2/3) ... [2020-09-24 23:51:31,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@492ed2a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:51:31, skipping insertion in model container [2020-09-24 23:51:31,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:51:31" (3/3) ... [2020-09-24 23:51:31,779 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-1.c [2020-09-24 23:51:31,794 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 23:51:31,804 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 23:51:31,828 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 23:51:31,860 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 23:51:31,860 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 23:51:31,860 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 23:51:31,861 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 23:51:31,861 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 23:51:31,861 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 23:51:31,861 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 23:51:31,861 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 23:51:31,888 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-09-24 23:51:31,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 23:51:31,897 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:31,898 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:51:31,898 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:31,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:31,905 INFO L82 PathProgramCache]: Analyzing trace with hash 606292035, now seen corresponding path program 1 times [2020-09-24 23:51:31,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:31,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858538568] [2020-09-24 23:51:31,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:32,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:32,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:32,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 23:51:32,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:32,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-09-24 23:51:32,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:32,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:32,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 23:51:32,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:32,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 23:51:32,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:32,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:32,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:32,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:32,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:32,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:32,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 23:51:32,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:32,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:32,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:32,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:32,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:32,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 23:51:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:32,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:32,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:32,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:32,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:32,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 23:51:32,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:32,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:32,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:32,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:32,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:32,403 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 23:51:32,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858538568] [2020-09-24 23:51:32,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 23:51:32,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 23:51:32,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000293967] [2020-09-24 23:51:32,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 23:51:32,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:32,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 23:51:32,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 23:51:32,436 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 3 states. [2020-09-24 23:51:32,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:32,572 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2020-09-24 23:51:32,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 23:51:32,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-09-24 23:51:32,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:32,587 INFO L225 Difference]: With dead ends: 73 [2020-09-24 23:51:32,587 INFO L226 Difference]: Without dead ends: 41 [2020-09-24 23:51:32,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 23:51:32,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-24 23:51:32,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-09-24 23:51:32,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-24 23:51:32,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-09-24 23:51:32,640 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 34 [2020-09-24 23:51:32,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:32,640 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-09-24 23:51:32,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 23:51:32,641 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-09-24 23:51:32,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 23:51:32,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:32,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:51:32,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 23:51:32,643 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:32,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:32,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1986388344, now seen corresponding path program 1 times [2020-09-24 23:51:32,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:32,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882009049] [2020-09-24 23:51:32,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:32,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:33,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:33,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-24 23:51:33,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:33,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-09-24 23:51:33,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:33,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 23:51:33,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 23:51:33,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 23:51:33,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:33,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:33,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:33,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:33,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:33,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:33,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 23:51:33,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:33,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:33,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:33,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:33,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:33,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 23:51:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:33,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:33,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:33,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:33,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:33,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 23:51:33,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:33,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:33,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:33,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:33,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:33,285 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 23:51:33,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882009049] [2020-09-24 23:51:33,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 23:51:33,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 23:51:33,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822901791] [2020-09-24 23:51:33,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 23:51:33,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:33,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 23:51:33,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 23:51:33,290 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 8 states. [2020-09-24 23:51:33,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:33,602 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-09-24 23:51:33,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 23:51:33,603 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-09-24 23:51:33,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:33,604 INFO L225 Difference]: With dead ends: 60 [2020-09-24 23:51:33,604 INFO L226 Difference]: Without dead ends: 46 [2020-09-24 23:51:33,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-24 23:51:33,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-24 23:51:33,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-09-24 23:51:33,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-24 23:51:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-09-24 23:51:33,623 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 36 [2020-09-24 23:51:33,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:33,623 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-09-24 23:51:33,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 23:51:33,624 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-09-24 23:51:33,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-24 23:51:33,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:33,627 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:51:33,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 23:51:33,628 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:33,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:33,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1471095088, now seen corresponding path program 1 times [2020-09-24 23:51:33,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:33,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015134739] [2020-09-24 23:51:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:33,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:34,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:34,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:34,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-24 23:51:34,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:51:34,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1312 [2020-09-24 23:51:34,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:34,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 23:51:34,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 23:51:34,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 23:51:34,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 23:51:35,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:35,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:35,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:35,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:35,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:35,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 23:51:35,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:35,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:35,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:35,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:35,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:35,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 23:51:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:35,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:35,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:35,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:35,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:35,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 23:51:35,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:35,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:35,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:35,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:35,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:35,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015134739] [2020-09-24 23:51:35,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:51:35,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 23:51:35,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657033260] [2020-09-24 23:51:35,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 23:51:35,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:35,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 23:51:35,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-24 23:51:35,145 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 9 states. [2020-09-24 23:51:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:35,414 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-09-24 23:51:35,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 23:51:35,414 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-09-24 23:51:35,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:35,416 INFO L225 Difference]: With dead ends: 66 [2020-09-24 23:51:35,416 INFO L226 Difference]: Without dead ends: 52 [2020-09-24 23:51:35,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-09-24 23:51:35,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-24 23:51:35,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-09-24 23:51:35,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-24 23:51:35,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-09-24 23:51:35,424 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 42 [2020-09-24 23:51:35,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:35,425 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-09-24 23:51:35,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 23:51:35,425 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-09-24 23:51:35,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 23:51:35,426 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:35,427 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 23:51:35,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 23:51:35,427 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:35,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:35,428 INFO L82 PathProgramCache]: Analyzing trace with hash -93423064, now seen corresponding path program 2 times [2020-09-24 23:51:35,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:35,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466787320] [2020-09-24 23:51:35,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:35,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:35,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:37,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:37,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 23:51:37,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:51:37,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1761 [2020-09-24 23:51:37,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:37,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 23:51:37,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 23:51:37,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 23:51:37,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:37,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:37,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:37,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:37,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:37,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:37,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 23:51:37,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:37,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:37,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:37,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:37,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:37,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 23:51:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:37,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:37,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:37,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:37,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:37,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 23:51:37,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:37,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:37,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:37,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:37,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:37,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466787320] [2020-09-24 23:51:37,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:51:37,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 23:51:37,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851633282] [2020-09-24 23:51:37,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 23:51:37,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:37,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 23:51:37,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-09-24 23:51:37,373 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 10 states. [2020-09-24 23:51:37,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:37,682 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-09-24 23:51:37,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 23:51:37,683 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-09-24 23:51:37,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:37,684 INFO L225 Difference]: With dead ends: 72 [2020-09-24 23:51:37,684 INFO L226 Difference]: Without dead ends: 58 [2020-09-24 23:51:37,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-24 23:51:37,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-24 23:51:37,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-09-24 23:51:37,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-24 23:51:37,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-09-24 23:51:37,692 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 48 [2020-09-24 23:51:37,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:37,693 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-09-24 23:51:37,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 23:51:37,693 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-09-24 23:51:37,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-24 23:51:37,694 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:37,694 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:51:37,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 23:51:37,695 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:37,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:37,695 INFO L82 PathProgramCache]: Analyzing trace with hash 399520640, now seen corresponding path program 3 times [2020-09-24 23:51:37,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:37,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490319039] [2020-09-24 23:51:37,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:37,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:37,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:40,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:40,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-24 23:51:40,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:51:40,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2810 [2020-09-24 23:51:40,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:40,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 23:51:40,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 23:51:40,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 23:51:40,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:40,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:40,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:40,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:40,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:40,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:40,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 23:51:40,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:40,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:40,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:40,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:40,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:40,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-24 23:51:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:40,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:40,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:40,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:40,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:40,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 23:51:40,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:40,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:40,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:40,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:40,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:40,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490319039] [2020-09-24 23:51:40,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:51:40,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 23:51:40,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296724846] [2020-09-24 23:51:40,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 23:51:40,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:40,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 23:51:40,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 23:51:40,740 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 11 states. [2020-09-24 23:51:41,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:41,165 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-09-24 23:51:41,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 23:51:41,166 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-09-24 23:51:41,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:41,167 INFO L225 Difference]: With dead ends: 78 [2020-09-24 23:51:41,167 INFO L226 Difference]: Without dead ends: 64 [2020-09-24 23:51:41,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2020-09-24 23:51:41,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-24 23:51:41,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-09-24 23:51:41,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-24 23:51:41,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-09-24 23:51:41,179 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 54 [2020-09-24 23:51:41,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:41,182 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-09-24 23:51:41,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 23:51:41,185 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-09-24 23:51:41,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-24 23:51:41,187 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:41,189 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:51:41,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 23:51:41,190 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:41,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:41,190 INFO L82 PathProgramCache]: Analyzing trace with hash 2020051672, now seen corresponding path program 4 times [2020-09-24 23:51:41,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:41,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236212372] [2020-09-24 23:51:41,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:41,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:41,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:44,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:44,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 23:51:44,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:51:44,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3507 [2020-09-24 23:51:44,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:44,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 23:51:44,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 23:51:44,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 23:51:44,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:44,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:44,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:44,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:44,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:44,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:44,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:44,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 23:51:44,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:44,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:44,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:44,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:44,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:44,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-24 23:51:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:44,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:44,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:44,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:44,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:44,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 23:51:44,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:44,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:44,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:44,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:44,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:44,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236212372] [2020-09-24 23:51:44,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:51:44,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 23:51:44,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686989398] [2020-09-24 23:51:44,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 23:51:44,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:44,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 23:51:44,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-09-24 23:51:44,957 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 12 states. [2020-09-24 23:51:45,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:45,380 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-09-24 23:51:45,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 23:51:45,381 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 60 [2020-09-24 23:51:45,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:45,382 INFO L225 Difference]: With dead ends: 84 [2020-09-24 23:51:45,382 INFO L226 Difference]: Without dead ends: 70 [2020-09-24 23:51:45,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-09-24 23:51:45,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-24 23:51:45,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-09-24 23:51:45,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-24 23:51:45,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-09-24 23:51:45,398 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 60 [2020-09-24 23:51:45,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:45,399 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-09-24 23:51:45,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 23:51:45,399 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-09-24 23:51:45,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-24 23:51:45,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:45,400 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:51:45,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 23:51:45,401 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:45,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:45,401 INFO L82 PathProgramCache]: Analyzing trace with hash 956694576, now seen corresponding path program 5 times [2020-09-24 23:51:45,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:45,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989242494] [2020-09-24 23:51:45,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:45,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:45,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:48,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:48,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-24 23:51:48,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:51:48,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3410 [2020-09-24 23:51:48,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:48,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 23:51:48,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 23:51:48,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 23:51:48,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:49,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:49,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:49,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:49,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:49,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:49,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 23:51:49,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:49,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:49,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:49,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:49,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:49,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-24 23:51:49,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:49,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:49,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:49,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:49,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:49,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 23:51:49,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:49,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:49,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:49,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:49,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:49,126 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:49,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989242494] [2020-09-24 23:51:49,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:51:49,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 23:51:49,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735487351] [2020-09-24 23:51:49,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 23:51:49,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:49,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 23:51:49,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-24 23:51:49,131 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 13 states. [2020-09-24 23:51:49,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:49,837 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-09-24 23:51:49,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 23:51:49,838 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-09-24 23:51:49,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:49,839 INFO L225 Difference]: With dead ends: 90 [2020-09-24 23:51:49,840 INFO L226 Difference]: Without dead ends: 76 [2020-09-24 23:51:49,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2020-09-24 23:51:49,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-24 23:51:49,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-09-24 23:51:49,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-24 23:51:49,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-09-24 23:51:49,857 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 66 [2020-09-24 23:51:49,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:49,862 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-09-24 23:51:49,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 23:51:49,863 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-09-24 23:51:49,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-24 23:51:49,867 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:49,867 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:51:49,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 23:51:49,868 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:49,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:49,868 INFO L82 PathProgramCache]: Analyzing trace with hash -212003960, now seen corresponding path program 6 times [2020-09-24 23:51:49,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:49,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85303091] [2020-09-24 23:51:49,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:49,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:50,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:52,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:52,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-24 23:51:52,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:51:52,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2397 [2020-09-24 23:51:52,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:52,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 23:51:52,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 23:51:52,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 23:51:52,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:52,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:52,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:52,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:52,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:52,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:52,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 23:51:52,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:52,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:52,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:52,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:52,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:52,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 23:51:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:52,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:52,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:52,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:52,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:52,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 23:51:52,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:52,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:52,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:52,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:52,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:52,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85303091] [2020-09-24 23:51:52,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:51:52,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 23:51:52,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070322434] [2020-09-24 23:51:52,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 23:51:52,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:52,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 23:51:52,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-24 23:51:52,603 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 14 states. [2020-09-24 23:51:53,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:53,165 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-09-24 23:51:53,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 23:51:53,166 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 72 [2020-09-24 23:51:53,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:53,168 INFO L225 Difference]: With dead ends: 96 [2020-09-24 23:51:53,169 INFO L226 Difference]: Without dead ends: 82 [2020-09-24 23:51:53,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=249, Invalid=681, Unknown=0, NotChecked=0, Total=930 [2020-09-24 23:51:53,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-24 23:51:53,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-09-24 23:51:53,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-24 23:51:53,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-09-24 23:51:53,190 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 72 [2020-09-24 23:51:53,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:53,191 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-09-24 23:51:53,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 23:51:53,192 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-09-24 23:51:53,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-24 23:51:53,193 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:53,194 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:51:53,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 23:51:53,194 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:53,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:53,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1778498336, now seen corresponding path program 7 times [2020-09-24 23:51:53,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:53,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74277392] [2020-09-24 23:51:53,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:53,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:53,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:56,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:56,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-24 23:51:56,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:51:56,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3149 [2020-09-24 23:51:56,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:56,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 23:51:56,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 23:51:56,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 23:51:56,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:56,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:56,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:56,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:56,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:56,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:56,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 23:51:56,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:56,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:56,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:56,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:56,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:56,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-24 23:51:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:56,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:56,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:56,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:56,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:56,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 23:51:56,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:56,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:56,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:56,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:56,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:56,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74277392] [2020-09-24 23:51:56,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:51:56,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 23:51:56,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913587340] [2020-09-24 23:51:56,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 23:51:56,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:56,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 23:51:56,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-24 23:51:56,614 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 15 states. [2020-09-24 23:51:57,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:57,204 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-09-24 23:51:57,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 23:51:57,205 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 78 [2020-09-24 23:51:57,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:57,208 INFO L225 Difference]: With dead ends: 102 [2020-09-24 23:51:57,208 INFO L226 Difference]: Without dead ends: 88 [2020-09-24 23:51:57,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 23:51:57,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-24 23:51:57,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2020-09-24 23:51:57,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-24 23:51:57,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-09-24 23:51:57,216 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 78 [2020-09-24 23:51:57,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:57,217 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-09-24 23:51:57,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 23:51:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-09-24 23:51:57,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-24 23:51:57,218 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:57,218 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:51:57,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 23:51:57,218 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:57,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:57,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1012601912, now seen corresponding path program 8 times [2020-09-24 23:51:57,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:57,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706237319] [2020-09-24 23:51:57,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:57,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:57,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:02,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:02,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-09-24 23:52:02,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:52:02,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-24 23:52:02,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:02,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 23:52:02,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 23:52:02,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-24 23:52:02,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:02,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:52:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:02,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:02,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:02,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:52:02,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:02,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 23:52:02,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:02,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:02,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:02,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:02,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:02,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-09-24 23:52:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:02,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:02,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:02,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:52:02,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:02,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 23:52:02,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:02,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:02,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:52:02,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:02,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:52:02,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706237319] [2020-09-24 23:52:02,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:52:02,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 23:52:02,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5792728] [2020-09-24 23:52:02,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 23:52:02,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:52:02,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 23:52:02,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-24 23:52:02,510 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 16 states. [2020-09-24 23:52:03,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:52:03,155 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-09-24 23:52:03,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 23:52:03,155 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 84 [2020-09-24 23:52:03,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:52:03,157 INFO L225 Difference]: With dead ends: 108 [2020-09-24 23:52:03,157 INFO L226 Difference]: Without dead ends: 94 [2020-09-24 23:52:03,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=367, Invalid=965, Unknown=0, NotChecked=0, Total=1332 [2020-09-24 23:52:03,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-24 23:52:03,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2020-09-24 23:52:03,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-24 23:52:03,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-09-24 23:52:03,165 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 84 [2020-09-24 23:52:03,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:52:03,166 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-09-24 23:52:03,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 23:52:03,166 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-09-24 23:52:03,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-24 23:52:03,167 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:52:03,167 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:52:03,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 23:52:03,168 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:52:03,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:52:03,168 INFO L82 PathProgramCache]: Analyzing trace with hash 113574288, now seen corresponding path program 9 times [2020-09-24 23:52:03,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:52:03,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410169903] [2020-09-24 23:52:03,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:52:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:03,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:03,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:07,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:07,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-24 23:52:07,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:52:07,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4178 [2020-09-24 23:52:07,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:07,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 23:52:07,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 23:52:07,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 23:52:07,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:07,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:52:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:07,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:07,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:07,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:52:07,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:07,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 23:52:07,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:07,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:07,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:07,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:07,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:07,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-24 23:52:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:07,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:07,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:07,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:52:07,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:07,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 23:52:07,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:07,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:07,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:52:07,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:07,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:52:07,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410169903] [2020-09-24 23:52:07,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:52:07,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 23:52:07,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726028284] [2020-09-24 23:52:07,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 23:52:07,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:52:07,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 23:52:07,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-09-24 23:52:07,616 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 17 states. [2020-09-24 23:52:08,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:52:08,451 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-09-24 23:52:08,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 23:52:08,452 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 90 [2020-09-24 23:52:08,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:52:08,453 INFO L225 Difference]: With dead ends: 114 [2020-09-24 23:52:08,454 INFO L226 Difference]: Without dead ends: 100 [2020-09-24 23:52:08,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=1191, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 23:52:08,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-24 23:52:08,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-09-24 23:52:08,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-24 23:52:08,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-09-24 23:52:08,462 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 90 [2020-09-24 23:52:08,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:52:08,462 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-09-24 23:52:08,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 23:52:08,463 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-09-24 23:52:08,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-24 23:52:08,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:52:08,464 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:52:08,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 23:52:08,464 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:52:08,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:52:08,464 INFO L82 PathProgramCache]: Analyzing trace with hash -227701528, now seen corresponding path program 10 times [2020-09-24 23:52:08,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:52:08,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245653721] [2020-09-24 23:52:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:52:08,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:08,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:08,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:13,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:13,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-09-24 23:52:13,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:52:13,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4567 [2020-09-24 23:52:13,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:13,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-24 23:52:13,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 23:52:13,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-09-24 23:52:13,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:13,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:52:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:13,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:13,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:13,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:52:13,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:13,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 23:52:13,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:13,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:13,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:13,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:13,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:52:13,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 23:52:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:13,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:13,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:13,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:52:13,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:13,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-24 23:52:13,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:13,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 23:52:13,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:13,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 23:52:13,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:52:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:52:13,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245653721] [2020-09-24 23:52:13,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:52:13,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 23:52:13,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937131568] [2020-09-24 23:52:13,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 23:52:13,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:52:13,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 23:52:13,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-09-24 23:52:13,800 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 22 states. [2020-09-24 23:52:15,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:52:15,395 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2020-09-24 23:52:15,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 23:52:15,395 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 96 [2020-09-24 23:52:15,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:52:15,397 INFO L225 Difference]: With dead ends: 113 [2020-09-24 23:52:15,397 INFO L226 Difference]: Without dead ends: 106 [2020-09-24 23:52:15,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=145, Invalid=1495, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 23:52:15,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-24 23:52:15,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2020-09-24 23:52:15,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-24 23:52:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-09-24 23:52:15,425 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 96 [2020-09-24 23:52:15,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:52:15,425 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-09-24 23:52:15,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 23:52:15,425 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-09-24 23:52:15,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-09-24 23:52:15,426 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:52:15,427 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:52:15,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 23:52:15,427 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:52:15,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:52:15,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1318701504, now seen corresponding path program 11 times [2020-09-24 23:52:15,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:52:15,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589507657] [2020-09-24 23:52:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:52:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:15,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:15,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking...