/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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:46:29,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:46:29,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:46:29,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:46:29,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:46:29,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:46:29,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:46:29,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:46:29,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:46:29,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:46:29,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:46:29,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:46:29,419 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:46:29,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:46:29,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:46:29,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:46:29,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:46:29,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:46:29,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:46:29,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:46:29,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:46:29,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:46:29,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:46:29,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:46:29,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:46:29,454 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:46:29,455 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:46:29,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:46:29,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:46:29,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:46:29,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:46:29,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:46:29,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:46:29,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:46:29,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:46:29,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:46:29,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:46:29,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:46:29,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:46:29,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:46:29,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:46:29,469 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 21:46:29,520 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:46:29,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:46:29,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:46:29,522 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:46:29,522 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:46:29,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:46:29,522 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:46:29,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:46:29,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:46:29,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:46:29,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:46:29,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:46:29,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:46:29,524 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:46:29,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:46:29,524 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:46:29,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:46:29,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:46:29,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:46:29,525 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:46:29,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:46:29,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:46:29,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:46:29,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:46:29,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:46:29,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:46:29,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:46:29,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:46:29,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:46:29,527 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:46:29,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:46:30,012 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:46:30,019 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:46:30,024 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:46:30,024 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:46:30,025 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label21.c [2020-09-24 21:46:30,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/63a19adff/5f663fb2455f4466b496b9cf1976e643/FLAG261a5f540 [2020-09-24 21:46:30,841 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:46:30,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label21.c [2020-09-24 21:46:30,859 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/63a19adff/5f663fb2455f4466b496b9cf1976e643/FLAG261a5f540 [2020-09-24 21:46:31,039 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/63a19adff/5f663fb2455f4466b496b9cf1976e643 [2020-09-24 21:46:31,054 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:46:31,059 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:46:31,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:46:31,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:46:31,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:46:31,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:46:31" (1/1) ... [2020-09-24 21:46:31,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697b2ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:31, skipping insertion in model container [2020-09-24 21:46:31,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:46:31" (1/1) ... [2020-09-24 21:46:31,077 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:46:31,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:46:31,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:46:31,675 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:46:31,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:46:31,964 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:46:31,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:31 WrapperNode [2020-09-24 21:46:31,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:46:31,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:46:31,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:46:31,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:46:31,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:31" (1/1) ... [2020-09-24 21:46:31,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:31" (1/1) ... [2020-09-24 21:46:32,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:31" (1/1) ... [2020-09-24 21:46:32,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:31" (1/1) ... [2020-09-24 21:46:32,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:31" (1/1) ... [2020-09-24 21:46:32,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:31" (1/1) ... [2020-09-24 21:46:32,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:31" (1/1) ... [2020-09-24 21:46:32,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:46:32,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:46:32,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:46:32,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:46:32,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:31" (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 21:46:32,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:46:32,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:46:32,239 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:46:32,239 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:46:32,239 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:46:32,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:46:32,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:46:32,240 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:46:32,241 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:46:32,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:46:32,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:46:33,971 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:46:33,971 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:46:33,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:46:33 BoogieIcfgContainer [2020-09-24 21:46:33,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:46:33,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:46:33,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:46:33,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:46:33,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:46:31" (1/3) ... [2020-09-24 21:46:33,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c607ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:46:33, skipping insertion in model container [2020-09-24 21:46:33,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:31" (2/3) ... [2020-09-24 21:46:33,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c607ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:46:33, skipping insertion in model container [2020-09-24 21:46:33,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:46:33" (3/3) ... [2020-09-24 21:46:33,994 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label21.c [2020-09-24 21:46:34,007 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:46:34,021 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:46:34,046 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:46:34,087 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:46:34,087 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:46:34,088 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:46:34,088 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:46:34,088 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:46:34,088 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:46:34,088 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:46:34,089 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:46:34,124 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states. [2020-09-24 21:46:34,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 21:46:34,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:46:34,137 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:46:34,137 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:46:34,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:46:34,144 INFO L82 PathProgramCache]: Analyzing trace with hash -2130690894, now seen corresponding path program 1 times [2020-09-24 21:46:34,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:46:34,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481277539] [2020-09-24 21:46:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:46:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:34,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:34,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:35,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:35,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-24 21:46:35,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:46:35,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 656 [2020-09-24 21:46:35,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:35,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:46:35,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:46:35,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-24 21:46:35,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:46:35,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:46:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:35,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:35,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:35,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:46:35,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:35,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 21:46:35,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:35,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:46:35,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:46:35,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 21:46:35,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:46:35,223 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 21:46:35,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481277539] [2020-09-24 21:46:35,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:46:35,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 21:46:35,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050058349] [2020-09-24 21:46:35,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 21:46:35,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:46:35,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 21:46:35,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 21:46:35,258 INFO L87 Difference]: Start difference. First operand 678 states. Second operand 4 states. [2020-09-24 21:46:38,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:46:38,474 INFO L93 Difference]: Finished difference Result 1656 states and 2196 transitions. [2020-09-24 21:46:38,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 21:46:38,476 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-09-24 21:46:38,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:46:38,505 INFO L225 Difference]: With dead ends: 1656 [2020-09-24 21:46:38,506 INFO L226 Difference]: Without dead ends: 920 [2020-09-24 21:46:38,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:46:38,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2020-09-24 21:46:38,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 806. [2020-09-24 21:46:38,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 806 states. [2020-09-24 21:46:38,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 969 transitions. [2020-09-24 21:46:38,664 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 969 transitions. Word has length 53 [2020-09-24 21:46:38,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:46:38,665 INFO L479 AbstractCegarLoop]: Abstraction has 806 states and 969 transitions. [2020-09-24 21:46:38,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 21:46:38,666 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 969 transitions. [2020-09-24 21:46:38,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-09-24 21:46:38,674 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:46:38,675 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:46:38,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:46:38,675 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:46:38,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:46:38,676 INFO L82 PathProgramCache]: Analyzing trace with hash -2128467461, now seen corresponding path program 1 times [2020-09-24 21:46:38,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:46:38,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114363461] [2020-09-24 21:46:38,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:46:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:38,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:39,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:39,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:39,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:40,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:41,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:41,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-09-24 21:46:41,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:46:41,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2792 [2020-09-24 21:46:41,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:41,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:46:41,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:46:41,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-09-24 21:46:41,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:46:41,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:46:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:41,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:41,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:41,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:46:41,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:41,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 21:46:41,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:41,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:46:41,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:46:41,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 21:46:41,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:46:41,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 21:46:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:41,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:41,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:41,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-24 21:46:41,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:41,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-09-24 21:46:41,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:41,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:46:41,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:46:41,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-24 21:46:41,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-24 21:46:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:46:41,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114363461] [2020-09-24 21:46:41,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:46:41,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 21:46:41,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050874657] [2020-09-24 21:46:41,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:46:41,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:46:41,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:46:41,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:46:41,966 INFO L87 Difference]: Start difference. First operand 806 states and 969 transitions. Second operand 7 states. [2020-09-24 21:46:44,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:46:44,994 INFO L93 Difference]: Finished difference Result 2035 states and 2551 transitions. [2020-09-24 21:46:44,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 21:46:44,995 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 132 [2020-09-24 21:46:44,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:46:45,005 INFO L225 Difference]: With dead ends: 2035 [2020-09-24 21:46:45,005 INFO L226 Difference]: Without dead ends: 1244 [2020-09-24 21:46:45,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:46:45,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2020-09-24 21:46:45,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 1196. [2020-09-24 21:46:45,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1196 states. [2020-09-24 21:46:45,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1450 transitions. [2020-09-24 21:46:45,073 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1450 transitions. Word has length 132 [2020-09-24 21:46:45,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:46:45,074 INFO L479 AbstractCegarLoop]: Abstraction has 1196 states and 1450 transitions. [2020-09-24 21:46:45,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:46:45,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1450 transitions. [2020-09-24 21:46:45,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-24 21:46:45,080 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:46:45,081 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:46:45,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:46:45,081 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:46:45,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:46:45,082 INFO L82 PathProgramCache]: Analyzing trace with hash 708146983, now seen corresponding path program 1 times [2020-09-24 21:46:45,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:46:45,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875809759] [2020-09-24 21:46:45,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:46:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:45,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:45,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:45,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:45,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:46,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:47,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:47,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-09-24 21:46:47,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:46:47,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2271 [2020-09-24 21:46:47,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:47,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 21:46:47,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:46:47,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-09-24 21:46:47,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:46:47,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:46:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:47,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:47,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:47,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:46:47,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:47,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 21:46:47,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:47,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:46:47,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:46:47,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 21:46:47,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:46:47,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 21:46:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:47,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:47,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:47,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:47,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 21:46:47,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:46:47,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-09-24 21:46:47,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:47,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:46:47,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:46:47,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-24 21:46:47,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:46:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:46:48,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875809759] [2020-09-24 21:46:48,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:46:48,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 21:46:48,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434844826] [2020-09-24 21:46:48,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 21:46:48,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:46:48,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 21:46:48,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:46:48,085 INFO L87 Difference]: Start difference. First operand 1196 states and 1450 transitions. Second operand 11 states. [2020-09-24 21:46:51,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:46:51,583 INFO L93 Difference]: Finished difference Result 3025 states and 3762 transitions. [2020-09-24 21:46:51,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 21:46:51,584 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-09-24 21:46:51,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:46:51,593 INFO L225 Difference]: With dead ends: 3025 [2020-09-24 21:46:51,593 INFO L226 Difference]: Without dead ends: 1844 [2020-09-24 21:46:51,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:46:51,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2020-09-24 21:46:51,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1824. [2020-09-24 21:46:51,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1824 states. [2020-09-24 21:46:51,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 2152 transitions. [2020-09-24 21:46:51,649 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 2152 transitions. Word has length 135 [2020-09-24 21:46:51,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:46:51,650 INFO L479 AbstractCegarLoop]: Abstraction has 1824 states and 2152 transitions. [2020-09-24 21:46:51,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 21:46:51,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 2152 transitions. [2020-09-24 21:46:51,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-24 21:46:51,653 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:46:51,653 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:46:51,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:46:51,653 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:46:51,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:46:51,654 INFO L82 PathProgramCache]: Analyzing trace with hash 5118375, now seen corresponding path program 1 times [2020-09-24 21:46:51,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:46:51,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276515784] [2020-09-24 21:46:51,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:46:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:51,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:51,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:51,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:52,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:53,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:53,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-09-24 21:46:53,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:46:53,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1831 [2020-09-24 21:46:53,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:53,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 21:46:53,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:46:53,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-09-24 21:46:53,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:46:53,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:46:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:53,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:53,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:53,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:46:53,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:53,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 21:46:53,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:53,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:46:53,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:46:53,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 21:46:53,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:46:53,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 21:46:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:53,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:54,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:54,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-09-24 21:46:54,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:54,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-09-24 21:46:54,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:54,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:46:54,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:46:54,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-09-24 21:46:54,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:46:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:46:54,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276515784] [2020-09-24 21:46:54,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:46:54,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 21:46:54,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465686741] [2020-09-24 21:46:54,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:46:54,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:46:54,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:46:54,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:46:54,512 INFO L87 Difference]: Start difference. First operand 1824 states and 2152 transitions. Second operand 10 states. [2020-09-24 21:46:59,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:46:59,699 INFO L93 Difference]: Finished difference Result 4004 states and 4975 transitions. [2020-09-24 21:46:59,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 21:46:59,699 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 146 [2020-09-24 21:46:59,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:46:59,710 INFO L225 Difference]: With dead ends: 4004 [2020-09-24 21:46:59,711 INFO L226 Difference]: Without dead ends: 2229 [2020-09-24 21:46:59,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:46:59,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2020-09-24 21:46:59,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 2207. [2020-09-24 21:46:59,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2207 states. [2020-09-24 21:46:59,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 2549 transitions. [2020-09-24 21:46:59,789 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 2549 transitions. Word has length 146 [2020-09-24 21:46:59,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:46:59,791 INFO L479 AbstractCegarLoop]: Abstraction has 2207 states and 2549 transitions. [2020-09-24 21:46:59,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:46:59,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 2549 transitions. [2020-09-24 21:46:59,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-09-24 21:46:59,796 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:46:59,796 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:46:59,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:46:59,798 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:46:59,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:46:59,799 INFO L82 PathProgramCache]: Analyzing trace with hash 379606603, now seen corresponding path program 1 times [2020-09-24 21:46:59,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:46:59,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814902370] [2020-09-24 21:46:59,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:46:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:59,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:00,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:00,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:02,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:02,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:02,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:03,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:04,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:47:04,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-09-24 21:47:04,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:47:04,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-09-24 21:47:04,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:47:04,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:47:04,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:47:04,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 205 [2020-09-24 21:47:04,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:47:05,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:47:05,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:47:05,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:05,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:47:05,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:47:05,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:47:05,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 21:47:05,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:47:05,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:47:05,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:47:05,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:47:05,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:47:05,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 21:47:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:47:05,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:05,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:47:05,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-09-24 21:47:05,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:47:05,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-09-24 21:47:05,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:47:05,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:47:05,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:47:05,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-09-24 21:47:05,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:47:05,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-24 21:47:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:47:05,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:05,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:47:05,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-24 21:47:05,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:47:05,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-09-24 21:47:05,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:47:05,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:47:05,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:47:05,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-09-24 21:47:05,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-24 21:47:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 77 proven. 68 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 21:47:05,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814902370] [2020-09-24 21:47:05,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:47:05,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 21:47:05,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770231680] [2020-09-24 21:47:05,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:47:05,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:47:05,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:47:05,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:47:05,972 INFO L87 Difference]: Start difference. First operand 2207 states and 2549 transitions. Second operand 10 states. [2020-09-24 21:47:10,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:47:10,966 INFO L93 Difference]: Finished difference Result 4442 states and 5321 transitions. [2020-09-24 21:47:10,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 21:47:10,969 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 254 [2020-09-24 21:47:10,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:47:10,982 INFO L225 Difference]: With dead ends: 4442 [2020-09-24 21:47:10,982 INFO L226 Difference]: Without dead ends: 2632 [2020-09-24 21:47:10,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2020-09-24 21:47:10,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2020-09-24 21:47:11,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2398. [2020-09-24 21:47:11,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2398 states. [2020-09-24 21:47:11,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 2790 transitions. [2020-09-24 21:47:11,050 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 2790 transitions. Word has length 254 [2020-09-24 21:47:11,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:47:11,051 INFO L479 AbstractCegarLoop]: Abstraction has 2398 states and 2790 transitions. [2020-09-24 21:47:11,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:47:11,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 2790 transitions. [2020-09-24 21:47:11,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2020-09-24 21:47:11,057 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:47:11,057 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:47:11,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:47:11,058 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:47:11,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:47:11,058 INFO L82 PathProgramCache]: Analyzing trace with hash -335038413, now seen corresponding path program 1 times [2020-09-24 21:47:11,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:47:11,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603218413] [2020-09-24 21:47:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:47:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:47:11,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:11,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:12,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:13,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:16,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:47:16,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 386 [2020-09-24 21:47:16,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:47:16,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-24 21:47:16,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:47:16,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:47:16,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 254 [2020-09-24 21:47:16,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-09-24 21:47:16,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:47:16,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:47:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:47:16,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:16,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:47:16,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:47:16,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:47:16,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:47:16,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:47:16,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:47:16,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:47:16,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:47:16,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:47:16,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 21:47:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:47:16,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:16,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:47:16,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-09-24 21:47:16,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:47:16,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-24 21:47:16,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:47:16,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:47:16,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:47:16,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:47:16,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:47:16,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-24 21:47:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:47:16,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:16,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:47:16,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-09-24 21:47:16,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:47:16,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-09-24 21:47:16,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:47:16,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:47:16,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:47:16,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-09-24 21:47:16,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:47:16,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-09-24 21:47:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:47:16,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:16,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:47:16,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 21:47:16,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:47:16,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-09-24 21:47:16,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:47:16,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:47:16,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:47:16,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-24 21:47:16,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:47:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 268 proven. 2 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-09-24 21:47:16,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603218413] [2020-09-24 21:47:16,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:47:16,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 21:47:16,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135127685] [2020-09-24 21:47:16,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:47:16,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:47:16,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:47:16,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:47:16,842 INFO L87 Difference]: Start difference. First operand 2398 states and 2790 transitions. Second operand 7 states. [2020-09-24 21:47:20,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:47:20,480 INFO L93 Difference]: Finished difference Result 5326 states and 6459 transitions. [2020-09-24 21:47:20,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 21:47:20,480 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 371 [2020-09-24 21:47:20,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:47:20,496 INFO L225 Difference]: With dead ends: 5326 [2020-09-24 21:47:20,496 INFO L226 Difference]: Without dead ends: 3325 [2020-09-24 21:47:20,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:47:20,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3325 states. [2020-09-24 21:47:20,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3325 to 3286. [2020-09-24 21:47:20,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3286 states. [2020-09-24 21:47:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 3896 transitions. [2020-09-24 21:47:20,584 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 3896 transitions. Word has length 371 [2020-09-24 21:47:20,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:47:20,585 INFO L479 AbstractCegarLoop]: Abstraction has 3286 states and 3896 transitions. [2020-09-24 21:47:20,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:47:20,585 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 3896 transitions. [2020-09-24 21:47:20,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-09-24 21:47:20,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:47:20,593 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:47:20,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:47:20,594 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:47:20,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:47:20,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1098057445, now seen corresponding path program 1 times [2020-09-24 21:47:20,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:47:20,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960128203] [2020-09-24 21:47:20,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:47:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:47:20,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking...