/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 SequenceOfStatements --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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:07:42,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:07:42,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:07:42,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:07:42,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:07:42,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:07:42,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:07:42,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:07:42,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:07:42,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:07:42,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:07:42,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:07:42,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:07:42,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:07:42,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:07:42,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:07:42,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:07:42,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:07:42,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:07:42,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:07:42,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:07:42,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:07:42,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:07:42,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:07:42,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:07:42,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:07:42,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:07:42,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:07:42,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:07:42,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:07:42,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:07:42,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:07:42,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:07:42,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:07:42,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:07:42,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:07:42,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:07:42,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:07:42,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:07:42,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:07:42,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:07:42,515 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 [2020-10-13 10:07:42,539 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:07:42,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:07:42,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:07:42,542 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:07:42,542 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:07:42,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:07:42,543 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:07:42,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:07:42,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:07:42,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:07:42,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:07:42,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:07:42,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:07:42,544 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:07:42,544 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:07:42,544 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:07:42,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:07:42,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:07:42,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:07:42,545 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:07:42,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:07:42,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:07:42,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:07:42,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:07:42,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:07:42,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:07:42,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:07:42,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:07:42,547 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:07:42,548 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 -> SequenceOfStatements 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:07:42,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:07:42,898 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:07:42,904 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:07:42,907 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:07:42,909 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:07:42,910 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label41.c [2020-10-13 10:07:42,990 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f44b573f/82001ff4c00b4817837500418b36c678/FLAGbe8e8ea7f [2020-10-13 10:07:44,008 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:07:44,009 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label41.c [2020-10-13 10:07:44,059 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f44b573f/82001ff4c00b4817837500418b36c678/FLAGbe8e8ea7f [2020-10-13 10:07:44,386 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f44b573f/82001ff4c00b4817837500418b36c678 [2020-10-13 10:07:44,398 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:07:44,400 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:07:44,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:07:44,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:07:44,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:07:44,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:07:44" (1/1) ... [2020-10-13 10:07:44,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e315e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:07:44, skipping insertion in model container [2020-10-13 10:07:44,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:07:44" (1/1) ... [2020-10-13 10:07:44,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:07:44,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:07:47,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:07:47,063 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:07:48,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:07:48,217 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:07:48,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:07:48 WrapperNode [2020-10-13 10:07:48,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:07:48,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:07:48,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:07:48,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:07:48,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:07:48" (1/1) ... [2020-10-13 10:07:48,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:07:48" (1/1) ... [2020-10-13 10:07:48,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:07:48" (1/1) ... [2020-10-13 10:07:48,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:07:48" (1/1) ... [2020-10-13 10:07:48,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:07:48" (1/1) ... [2020-10-13 10:07:48,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:07:48" (1/1) ... [2020-10-13 10:07:48,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:07:48" (1/1) ... [2020-10-13 10:07:48,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:07:48,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:07:48,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:07:48,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:07:48,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:07:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:07:48,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:07:48,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:07:48,740 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 10:07:48,740 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 10:07:48,740 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 10:07:48,740 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 10:07:48,741 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-13 10:07:48,741 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-13 10:07:48,741 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:07:48,741 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 10:07:48,741 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 10:07:48,742 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 10:07:48,742 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 10:07:48,742 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-13 10:07:48,742 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-13 10:07:48,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:07:48,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:07:48,743 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:07:48,743 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:07:48,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:07:48,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:08:02,485 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:08:02,486 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:08:02,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:08:02 BoogieIcfgContainer [2020-10-13 10:08:02,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:08:02,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:08:02,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:08:02,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:08:02,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:07:44" (1/3) ... [2020-10-13 10:08:02,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b4343f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:08:02, skipping insertion in model container [2020-10-13 10:08:02,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:07:48" (2/3) ... [2020-10-13 10:08:02,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b4343f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:08:02, skipping insertion in model container [2020-10-13 10:08:02,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:08:02" (3/3) ... [2020-10-13 10:08:02,513 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label41.c [2020-10-13 10:08:02,526 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:08:02,537 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:08:02,553 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:08:02,589 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:08:02,589 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:08:02,590 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:08:02,590 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:08:02,590 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:08:02,590 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:08:02,590 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:08:02,591 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:08:02,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-13 10:08:02,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:08:02,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:08:02,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:08:02,670 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:08:02,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:08:02,677 INFO L82 PathProgramCache]: Analyzing trace with hash 685512794, now seen corresponding path program 1 times [2020-10-13 10:08:02,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:08:02,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981392868] [2020-10-13 10:08:02,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:08:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:08:02,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:03,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:08:03,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:08:03,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:08:03,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-10-13 10:08:03,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:08:03,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:08:03,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:08:03,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:08:03,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:08:03,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:08:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:08:03,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:03,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:08:03,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:08:03,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:08:03,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-13 10:08:03,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:08:03,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:08:03,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:08:03,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:08:03,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:08:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:08:03,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981392868] [2020-10-13 10:08:03,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:08:03,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:08:03,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899853885] [2020-10-13 10:08:03,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:08:03,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:08:03,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:08:03,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:08:03,336 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-13 10:08:29,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:08:29,670 INFO L93 Difference]: Finished difference Result 5095 states and 9566 transitions. [2020-10-13 10:08:29,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:08:29,673 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-13 10:08:29,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:08:29,719 INFO L225 Difference]: With dead ends: 5095 [2020-10-13 10:08:29,720 INFO L226 Difference]: Without dead ends: 3254 [2020-10-13 10:08:29,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:08:29,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3254 states. [2020-10-13 10:08:29,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3254 to 3208. [2020-10-13 10:08:29,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3208 states. [2020-10-13 10:08:29,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 5177 transitions. [2020-10-13 10:08:29,972 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 5177 transitions. Word has length 12 [2020-10-13 10:08:29,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:08:29,973 INFO L479 AbstractCegarLoop]: Abstraction has 3208 states and 5177 transitions. [2020-10-13 10:08:29,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:08:29,974 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 5177 transitions. [2020-10-13 10:08:29,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 10:08:29,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:08:29,978 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:08:29,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:08:29,979 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:08:29,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:08:29,980 INFO L82 PathProgramCache]: Analyzing trace with hash -206282927, now seen corresponding path program 1 times [2020-10-13 10:08:29,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:08:29,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118107302] [2020-10-13 10:08:29,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:08:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:08:30,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:30,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:31,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:31,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:08:31,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 10:08:31,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:08:31,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1693 [2020-10-13 10:08:31,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:08:31,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:08:31,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-13 10:08:31,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:08:31,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:08:31,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:08:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:08:31,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:31,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:08:31,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:08:31,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:08:31,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:08:31,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:08:31,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:08:31,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:08:31,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:08:31,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:08:31,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:08:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:08:31,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:31,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:08:31,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 10:08:31,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:08:31,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-13 10:08:31,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:08:31,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:08:31,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:08:31,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 10:08:31,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:08:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:08:32,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118107302] [2020-10-13 10:08:32,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:08:32,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:08:32,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318156008] [2020-10-13 10:08:32,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:08:32,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:08:32,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:08:32,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:08:32,031 INFO L87 Difference]: Start difference. First operand 3208 states and 5177 transitions. Second operand 5 states. [2020-10-13 10:09:10,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:09:10,839 INFO L93 Difference]: Finished difference Result 7912 states and 13254 transitions. [2020-10-13 10:09:10,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:09:10,844 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2020-10-13 10:09:10,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:09:10,872 INFO L225 Difference]: With dead ends: 7912 [2020-10-13 10:09:10,873 INFO L226 Difference]: Without dead ends: 4710 [2020-10-13 10:09:10,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:09:10,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4710 states. [2020-10-13 10:09:11,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4710 to 4664. [2020-10-13 10:09:11,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4664 states. [2020-10-13 10:09:11,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4664 states to 4664 states and 7160 transitions. [2020-10-13 10:09:11,038 INFO L78 Accepts]: Start accepts. Automaton has 4664 states and 7160 transitions. Word has length 87 [2020-10-13 10:09:11,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:09:11,040 INFO L479 AbstractCegarLoop]: Abstraction has 4664 states and 7160 transitions. [2020-10-13 10:09:11,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:09:11,040 INFO L276 IsEmpty]: Start isEmpty. Operand 4664 states and 7160 transitions. [2020-10-13 10:09:11,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 10:09:11,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:09:11,044 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:09:11,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:09:11,045 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:09:11,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:09:11,046 INFO L82 PathProgramCache]: Analyzing trace with hash 2022256061, now seen corresponding path program 1 times [2020-10-13 10:09:11,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:09:11,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966713898] [2020-10-13 10:09:11,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:09:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:09:11,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:11,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:11,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:09:11,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 10:09:11,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:09:11,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 888 [2020-10-13 10:09:11,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:09:11,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:09:11,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-13 10:09:11,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:09:11,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:09:12,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:09:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:09:12,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:12,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:09:12,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:09:12,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:09:12,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:09:12,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:09:12,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:09:12,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:09:12,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:09:12,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:09:12,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:09:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:09:12,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:12,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:09:12,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 10:09:12,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:09:12,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-13 10:09:12,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:09:12,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:09:12,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:09:12,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 10:09:12,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:09:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:09:12,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966713898] [2020-10-13 10:09:12,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:09:12,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:09:12,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982059620] [2020-10-13 10:09:12,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:09:12,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:09:12,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:09:12,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:09:12,269 INFO L87 Difference]: Start difference. First operand 4664 states and 7160 transitions. Second operand 5 states. [2020-10-13 10:09:54,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:09:54,844 INFO L93 Difference]: Finished difference Result 10817 states and 17225 transitions. [2020-10-13 10:09:54,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:09:54,847 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2020-10-13 10:09:54,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:09:54,878 INFO L225 Difference]: With dead ends: 10817 [2020-10-13 10:09:54,879 INFO L226 Difference]: Without dead ends: 6159 [2020-10-13 10:09:54,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:09:54,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6159 states. [2020-10-13 10:09:55,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6159 to 6106. [2020-10-13 10:09:55,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6106 states. [2020-10-13 10:09:55,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6106 states to 6106 states and 9139 transitions. [2020-10-13 10:09:55,027 INFO L78 Accepts]: Start accepts. Automaton has 6106 states and 9139 transitions. Word has length 88 [2020-10-13 10:09:55,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:09:55,027 INFO L479 AbstractCegarLoop]: Abstraction has 6106 states and 9139 transitions. [2020-10-13 10:09:55,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:09:55,028 INFO L276 IsEmpty]: Start isEmpty. Operand 6106 states and 9139 transitions. [2020-10-13 10:09:55,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 10:09:55,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:09:55,030 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:09:55,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:09:55,031 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:09:55,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:09:55,031 INFO L82 PathProgramCache]: Analyzing trace with hash -179108716, now seen corresponding path program 1 times [2020-10-13 10:09:55,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:09:55,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430246604] [2020-10-13 10:09:55,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:09:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:09:55,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:55,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:55,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:55,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:09:55,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 10:09:55,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:09:55,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 861 [2020-10-13 10:09:55,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:09:55,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:09:55,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-10-13 10:09:55,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:09:55,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:09:56,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:09:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:09:56,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:56,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:09:56,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:09:56,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:09:56,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:09:56,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:09:56,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:09:56,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:09:56,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:09:56,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:09:56,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:09:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:09:56,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:56,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:09:56,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 10:09:56,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:09:56,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-13 10:09:56,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:09:56,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:09:56,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:09:56,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-13 10:09:56,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:09:56,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:09:56,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430246604] [2020-10-13 10:09:56,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:09:56,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:09:56,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683326896] [2020-10-13 10:09:56,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:09:56,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:09:56,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:09:56,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:09:56,186 INFO L87 Difference]: Start difference. First operand 6106 states and 9139 transitions. Second operand 5 states. [2020-10-13 10:10:37,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:10:37,904 INFO L93 Difference]: Finished difference Result 13701 states and 21226 transitions. [2020-10-13 10:10:37,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:10:37,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-10-13 10:10:37,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:10:37,945 INFO L225 Difference]: With dead ends: 13701 [2020-10-13 10:10:37,946 INFO L226 Difference]: Without dead ends: 7601 [2020-10-13 10:10:37,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:10:37,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7601 states. [2020-10-13 10:10:38,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7601 to 7517. [2020-10-13 10:10:38,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7517 states. [2020-10-13 10:10:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7517 states to 7517 states and 11316 transitions. [2020-10-13 10:10:38,113 INFO L78 Accepts]: Start accepts. Automaton has 7517 states and 11316 transitions. Word has length 99 [2020-10-13 10:10:38,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:10:38,115 INFO L479 AbstractCegarLoop]: Abstraction has 7517 states and 11316 transitions. [2020-10-13 10:10:38,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:10:38,115 INFO L276 IsEmpty]: Start isEmpty. Operand 7517 states and 11316 transitions. [2020-10-13 10:10:38,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 10:10:38,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:10:38,121 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:10:38,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:10:38,122 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:10:38,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:10:38,122 INFO L82 PathProgramCache]: Analyzing trace with hash -650675793, now seen corresponding path program 1 times [2020-10-13 10:10:38,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:10:38,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699663912] [2020-10-13 10:10:38,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:10:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:38,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:38,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:39,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:39,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 10:10:39,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:10:39,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 954 [2020-10-13 10:10:39,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:39,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:10:39,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-13 10:10:39,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:10:39,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:10:39,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:10:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:39,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:39,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:39,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:10:39,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:39,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:10:39,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:39,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:10:39,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:10:39,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:10:39,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:10:39,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:10:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:39,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:39,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:39,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 10:10:39,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:39,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-13 10:10:39,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:39,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:10:39,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:10:39,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 10:10:39,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:10:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:10:39,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699663912] [2020-10-13 10:10:39,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:10:39,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:10:39,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512807763] [2020-10-13 10:10:39,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:10:39,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:10:39,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:10:39,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:10:39,504 INFO L87 Difference]: Start difference. First operand 7517 states and 11316 transitions. Second operand 5 states. [2020-10-13 10:11:37,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:11:37,899 INFO L93 Difference]: Finished difference Result 22081 states and 33829 transitions. [2020-10-13 10:11:37,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:11:37,912 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 113 [2020-10-13 10:11:37,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:11:37,977 INFO L225 Difference]: With dead ends: 22081 [2020-10-13 10:11:37,978 INFO L226 Difference]: Without dead ends: 14570 [2020-10-13 10:11:37,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:11:38,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14570 states. [2020-10-13 10:11:38,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14570 to 14538. [2020-10-13 10:11:38,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14538 states. [2020-10-13 10:11:38,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14538 states to 14538 states and 19466 transitions. [2020-10-13 10:11:38,379 INFO L78 Accepts]: Start accepts. Automaton has 14538 states and 19466 transitions. Word has length 113 [2020-10-13 10:11:38,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:11:38,380 INFO L479 AbstractCegarLoop]: Abstraction has 14538 states and 19466 transitions. [2020-10-13 10:11:38,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:11:38,381 INFO L276 IsEmpty]: Start isEmpty. Operand 14538 states and 19466 transitions. [2020-10-13 10:11:38,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-13 10:11:38,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:11:38,393 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:11:38,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:11:38,395 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:11:38,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:11:38,395 INFO L82 PathProgramCache]: Analyzing trace with hash -272695945, now seen corresponding path program 1 times [2020-10-13 10:11:38,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:11:38,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730447151] [2020-10-13 10:11:38,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:11:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:38,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:38,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:38,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-13 10:11:38,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:11:38,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-10-13 10:11:38,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:38,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:11:38,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:11:38,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-13 10:11:38,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:11:38,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:11:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:38,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:38,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:38,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:11:38,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:11:38,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:11:38,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:38,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:11:38,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:11:38,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:11:38,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:11:39,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:11:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:39,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:39,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:39,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 10:11:39,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:11:39,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-13 10:11:39,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:39,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:11:39,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:11:39,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-13 10:11:39,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:11:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:11:39,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730447151] [2020-10-13 10:11:39,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:11:39,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:11:39,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314196425] [2020-10-13 10:11:39,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:11:39,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:11:39,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:11:39,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:11:39,396 INFO L87 Difference]: Start difference. First operand 14538 states and 19466 transitions. Second operand 7 states.