/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/Problem17_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 09:31:03,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 09:31:03,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 09:31:03,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 09:31:03,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 09:31:03,538 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 09:31:03,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 09:31:03,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 09:31:03,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 09:31:03,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 09:31:03,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 09:31:03,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 09:31:03,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 09:31:03,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 09:31:03,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 09:31:03,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 09:31:03,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 09:31:03,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 09:31:03,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 09:31:03,558 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 09:31:03,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 09:31:03,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 09:31:03,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 09:31:03,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 09:31:03,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 09:31:03,568 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 09:31:03,569 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 09:31:03,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 09:31:03,571 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 09:31:03,572 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 09:31:03,572 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 09:31:03,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 09:31:03,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 09:31:03,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 09:31:03,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 09:31:03,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 09:31:03,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 09:31:03,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 09:31:03,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 09:31:03,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 09:31:03,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 09:31:03,587 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 09:31:03,647 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 09:31:03,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 09:31:03,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 09:31:03,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 09:31:03,653 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 09:31:03,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 09:31:03,653 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 09:31:03,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 09:31:03,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 09:31:03,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 09:31:03,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 09:31:03,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 09:31:03,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 09:31:03,657 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 09:31:03,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 09:31:03,657 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 09:31:03,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 09:31:03,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 09:31:03,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 09:31:03,660 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 09:31:03,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 09:31:03,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 09:31:03,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 09:31:03,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 09:31:03,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 09:31:03,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 09:31:03,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 09:31:03,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 09:31:03,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 09:31:03,662 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 09:31:04,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 09:31:04,032 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 09:31:04,036 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 09:31:04,038 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 09:31:04,039 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 09:31:04,040 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label21.c [2020-10-13 09:31:04,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70971c8fc/e7489dfb20c64d55baa191facc204293/FLAGed6de0db6 [2020-10-13 09:31:04,934 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 09:31:04,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label21.c [2020-10-13 09:31:04,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70971c8fc/e7489dfb20c64d55baa191facc204293/FLAGed6de0db6 [2020-10-13 09:31:05,046 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70971c8fc/e7489dfb20c64d55baa191facc204293 [2020-10-13 09:31:05,062 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 09:31:05,065 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 09:31:05,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 09:31:05,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 09:31:05,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 09:31:05,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:31:05" (1/1) ... [2020-10-13 09:31:05,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@217a2c60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:31:05, skipping insertion in model container [2020-10-13 09:31:05,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:31:05" (1/1) ... [2020-10-13 09:31:05,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 09:31:05,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 09:31:06,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 09:31:06,780 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 09:31:07,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 09:31:07,205 INFO L208 MainTranslator]: Completed translation [2020-10-13 09:31:07,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:31:07 WrapperNode [2020-10-13 09:31:07,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 09:31:07,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 09:31:07,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 09:31:07,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 09:31:07,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:31:07" (1/1) ... [2020-10-13 09:31:07,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:31:07" (1/1) ... [2020-10-13 09:31:07,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:31:07" (1/1) ... [2020-10-13 09:31:07,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:31:07" (1/1) ... [2020-10-13 09:31:07,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:31:07" (1/1) ... [2020-10-13 09:31:07,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:31:07" (1/1) ... [2020-10-13 09:31:07,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:31:07" (1/1) ... [2020-10-13 09:31:07,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 09:31:07,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 09:31:07,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 09:31:07,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 09:31:07,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:31:07" (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 09:31:07,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 09:31:07,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 09:31:07,587 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 09:31:07,588 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 09:31:07,588 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 09:31:07,588 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 09:31:07,588 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 09:31:07,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 09:31:07,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 09:31:07,589 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 09:31:07,589 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 09:31:07,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 09:31:07,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 09:31:16,776 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 09:31:16,777 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 09:31:16,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:31:16 BoogieIcfgContainer [2020-10-13 09:31:16,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 09:31:16,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 09:31:16,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 09:31:16,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 09:31:16,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:31:05" (1/3) ... [2020-10-13 09:31:16,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5848a09e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:31:16, skipping insertion in model container [2020-10-13 09:31:16,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:31:07" (2/3) ... [2020-10-13 09:31:16,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5848a09e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:31:16, skipping insertion in model container [2020-10-13 09:31:16,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:31:16" (3/3) ... [2020-10-13 09:31:16,814 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label21.c [2020-10-13 09:31:16,830 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 09:31:16,846 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 09:31:16,863 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 09:31:16,897 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 09:31:16,898 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 09:31:16,898 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 09:31:16,898 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 09:31:16,898 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 09:31:16,898 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 09:31:16,898 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 09:31:16,898 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 09:31:16,935 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2020-10-13 09:31:16,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 09:31:16,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:31:16,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 09:31:16,949 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:31:16,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:31:16,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1940897135, now seen corresponding path program 1 times [2020-10-13 09:31:16,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:31:16,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099466000] [2020-10-13 09:31:16,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:31:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:31:17,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:17,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:31:17,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 09:31:17,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:31:17,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 597 [2020-10-13 09:31:17,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:31:17,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 09:31:17,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 09:31:17,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 09:31:17,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 09:31:17,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:31:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:31:17,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:17,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:31:17,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:31:17,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:31:17,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 09:31:17,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:31:17,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:31:17,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:31:17,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:31:17,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:31:18,011 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 09:31:18,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099466000] [2020-10-13 09:31:18,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 09:31:18,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 09:31:18,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009073509] [2020-10-13 09:31:18,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 09:31:18,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:31:18,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 09:31:18,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 09:31:18,048 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2020-10-13 09:31:29,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:31:29,387 INFO L93 Difference]: Finished difference Result 1692 states and 3091 transitions. [2020-10-13 09:31:29,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:31:29,390 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-13 09:31:29,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:31:29,421 INFO L225 Difference]: With dead ends: 1692 [2020-10-13 09:31:29,422 INFO L226 Difference]: Without dead ends: 1012 [2020-10-13 09:31:29,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:31:29,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2020-10-13 09:31:29,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 1002. [2020-10-13 09:31:29,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1002 states. [2020-10-13 09:31:29,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1542 transitions. [2020-10-13 09:31:29,597 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1542 transitions. Word has length 65 [2020-10-13 09:31:29,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:31:29,598 INFO L479 AbstractCegarLoop]: Abstraction has 1002 states and 1542 transitions. [2020-10-13 09:31:29,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 09:31:29,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1542 transitions. [2020-10-13 09:31:29,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 09:31:29,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:31:29,607 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, 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] [2020-10-13 09:31:29,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 09:31:29,608 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:31:29,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:31:29,609 INFO L82 PathProgramCache]: Analyzing trace with hash 821258535, now seen corresponding path program 1 times [2020-10-13 09:31:29,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:31:29,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506924060] [2020-10-13 09:31:29,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:31:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:31:29,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:30,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:30,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:32,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:32,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:31:32,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-13 09:31:32,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 09:31:32,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2827 [2020-10-13 09:31:32,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:31:32,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 09:31:32,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 09:31:32,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 09:31:32,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:31:32,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:31:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:31:32,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:32,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:31:32,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:31:32,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:31:32,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 09:31:32,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:31:32,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:31:32,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:31:32,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:31:32,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 09:31:32,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:31:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:31:32,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:33,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:31:33,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 09:31:33,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:31:33,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-13 09:31:33,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:31:33,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:31:33,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:31:33,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 09:31:33,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 09:31:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:31:33,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506924060] [2020-10-13 09:31:33,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:31:33,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 09:31:33,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810247733] [2020-10-13 09:31:33,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 09:31:33,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:31:33,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 09:31:33,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 09:31:33,204 INFO L87 Difference]: Start difference. First operand 1002 states and 1542 transitions. Second operand 8 states. [2020-10-13 09:31:34,648 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-13 09:31:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:31:45,428 INFO L93 Difference]: Finished difference Result 2156 states and 3257 transitions. [2020-10-13 09:31:45,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 09:31:45,430 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 136 [2020-10-13 09:31:45,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:31:45,440 INFO L225 Difference]: With dead ends: 2156 [2020-10-13 09:31:45,441 INFO L226 Difference]: Without dead ends: 1006 [2020-10-13 09:31:45,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-13 09:31:45,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2020-10-13 09:31:45,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 1002. [2020-10-13 09:31:45,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1002 states. [2020-10-13 09:31:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1462 transitions. [2020-10-13 09:31:45,489 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1462 transitions. Word has length 136 [2020-10-13 09:31:45,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:31:45,490 INFO L479 AbstractCegarLoop]: Abstraction has 1002 states and 1462 transitions. [2020-10-13 09:31:45,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 09:31:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1462 transitions. [2020-10-13 09:31:45,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-13 09:31:45,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:31:45,494 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, 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] [2020-10-13 09:31:45,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 09:31:45,494 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:31:45,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:31:45,495 INFO L82 PathProgramCache]: Analyzing trace with hash -340123911, now seen corresponding path program 1 times [2020-10-13 09:31:45,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:31:45,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551157567] [2020-10-13 09:31:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:31:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:31:45,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:45,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:46,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:49,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:31:49,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 09:31:49,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:31:49,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4293 [2020-10-13 09:31:49,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:31:49,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 09:31:49,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-13 09:31:49,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 09:31:49,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:31:50,231 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2020-10-13 09:31:50,412 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2020-10-13 09:31:50,593 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2020-10-13 09:31:50,813 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2020-10-13 09:31:51,020 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2020-10-13 09:31:51,184 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2020-10-13 09:31:51,420 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2020-10-13 09:31:51,675 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2020-10-13 09:31:52,034 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2020-10-13 09:31:52,457 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2020-10-13 09:31:52,759 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2020-10-13 09:31:52,985 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-13 09:31:53,146 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-10-13 09:31:53,325 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-13 09:31:53,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:31:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:31:53,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:53,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:31:53,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:31:53,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:31:53,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:31:53,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:31:53,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:31:53,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:31:53,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:31:53,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:31:53,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:31:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:31:53,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:31:53,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:31:53,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 09:31:53,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:31:53,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-13 09:31:53,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:31:53,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:31:53,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:31:53,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 09:31:53,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:31:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:31:53,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551157567] [2020-10-13 09:31:53,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:31:53,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 09:31:53,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409120004] [2020-10-13 09:31:53,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 09:31:53,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:31:53,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 09:31:53,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2020-10-13 09:31:53,795 INFO L87 Difference]: Start difference. First operand 1002 states and 1462 transitions. Second operand 20 states. [2020-10-13 09:32:11,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:32:11,677 INFO L93 Difference]: Finished difference Result 2335 states and 3301 transitions. [2020-10-13 09:32:11,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 09:32:11,679 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 139 [2020-10-13 09:32:11,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:32:11,693 INFO L225 Difference]: With dead ends: 2335 [2020-10-13 09:32:11,694 INFO L226 Difference]: Without dead ends: 1006 [2020-10-13 09:32:11,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=478, Invalid=782, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 09:32:11,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2020-10-13 09:32:11,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 1002. [2020-10-13 09:32:11,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1002 states. [2020-10-13 09:32:11,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1412 transitions. [2020-10-13 09:32:11,758 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1412 transitions. Word has length 139 [2020-10-13 09:32:11,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:32:11,760 INFO L479 AbstractCegarLoop]: Abstraction has 1002 states and 1412 transitions. [2020-10-13 09:32:11,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 09:32:11,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1412 transitions. [2020-10-13 09:32:11,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-13 09:32:11,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:32:11,768 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, 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] [2020-10-13 09:32:11,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 09:32:11,769 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:32:11,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:32:11,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1282025149, now seen corresponding path program 1 times [2020-10-13 09:32:11,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:32:11,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183565223] [2020-10-13 09:32:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:32:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:32:11,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:32:12,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:32:12,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:32:14,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:32:14,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-13 09:32:14,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:32:14,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2197 [2020-10-13 09:32:14,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:32:14,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 09:32:14,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-13 09:32:14,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 09:32:14,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:32:14,290 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2020-10-13 09:32:14,422 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2020-10-13 09:32:14,610 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2020-10-13 09:32:14,782 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2020-10-13 09:32:14,978 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 33 [2020-10-13 09:32:15,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:32:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:32:15,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:32:15,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:32:15,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:32:15,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:32:15,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:32:15,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:32:15,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:32:15,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:32:15,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:32:15,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:32:15,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:32:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:32:15,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:32:15,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:32:15,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 09:32:15,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:32:15,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-13 09:32:15,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:32:15,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:32:15,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:32:15,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 09:32:15,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:32:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:32:15,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183565223] [2020-10-13 09:32:15,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:32:15,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 09:32:15,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967770241] [2020-10-13 09:32:15,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 09:32:15,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:32:15,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 09:32:15,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 09:32:15,506 INFO L87 Difference]: Start difference. First operand 1002 states and 1412 transitions. Second operand 11 states. [2020-10-13 09:32:16,912 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-13 09:32:17,202 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-10-13 09:32:17,790 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-10-13 09:32:18,089 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-10-13 09:32:18,400 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-10-13 09:32:36,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:32:36,493 INFO L93 Difference]: Finished difference Result 2060 states and 2888 transitions. [2020-10-13 09:32:36,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 09:32:36,495 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 141 [2020-10-13 09:32:36,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:32:36,501 INFO L225 Difference]: With dead ends: 2060 [2020-10-13 09:32:36,502 INFO L226 Difference]: Without dead ends: 1006 [2020-10-13 09:32:36,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2020-10-13 09:32:36,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2020-10-13 09:32:36,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 1002. [2020-10-13 09:32:36,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1002 states. [2020-10-13 09:32:36,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1410 transitions. [2020-10-13 09:32:36,537 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1410 transitions. Word has length 141 [2020-10-13 09:32:36,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:32:36,537 INFO L479 AbstractCegarLoop]: Abstraction has 1002 states and 1410 transitions. [2020-10-13 09:32:36,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 09:32:36,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1410 transitions. [2020-10-13 09:32:36,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-13 09:32:36,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:32:36,540 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, 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] [2020-10-13 09:32:36,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 09:32:36,540 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:32:36,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:32:36,540 INFO L82 PathProgramCache]: Analyzing trace with hash -462261193, now seen corresponding path program 1 times [2020-10-13 09:32:36,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:32:36,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592555582] [2020-10-13 09:32:36,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:32:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:32:36,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:32:36,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:32:37,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:32:37,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:32:37,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 09:32:37,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:32:37,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1365 [2020-10-13 09:32:37,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:32:37,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:32:37,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-13 09:32:37,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 09:32:37,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:32:38,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:32:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:32:38,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:32:38,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:32:38,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:32:38,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:32:38,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:32:38,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:32:38,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:32:38,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:32:38,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:32:38,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:32:38,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:32:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:32:38,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:32:38,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:32:38,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 09:32:38,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:32:38,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-13 09:32:38,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:32:38,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:32:38,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:32:38,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 09:32:38,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:32:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:32:38,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592555582] [2020-10-13 09:32:38,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:32:38,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:32:38,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008416831] [2020-10-13 09:32:38,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:32:38,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:32:38,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:32:38,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:32:38,349 INFO L87 Difference]: Start difference. First operand 1002 states and 1410 transitions. Second operand 5 states. [2020-10-13 09:32:47,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:32:47,642 INFO L93 Difference]: Finished difference Result 2049 states and 2873 transitions. [2020-10-13 09:32:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:32:47,644 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 144 [2020-10-13 09:32:47,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:32:47,651 INFO L225 Difference]: With dead ends: 2049 [2020-10-13 09:32:47,651 INFO L226 Difference]: Without dead ends: 1006 [2020-10-13 09:32:47,655 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 09:32:47,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2020-10-13 09:32:47,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 1002. [2020-10-13 09:32:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1002 states. [2020-10-13 09:32:47,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1408 transitions. [2020-10-13 09:32:47,686 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1408 transitions. Word has length 144 [2020-10-13 09:32:47,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:32:47,687 INFO L479 AbstractCegarLoop]: Abstraction has 1002 states and 1408 transitions. [2020-10-13 09:32:47,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:32:47,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1408 transitions. [2020-10-13 09:32:47,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-13 09:32:47,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:32:47,690 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, 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] [2020-10-13 09:32:47,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 09:32:47,690 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:32:47,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:32:47,691 INFO L82 PathProgramCache]: Analyzing trace with hash -69070137, now seen corresponding path program 1 times [2020-10-13 09:32:47,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:32:47,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958058222] [2020-10-13 09:32:47,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:32:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:32:47,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:32:47,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:32:47,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-13 09:32:47,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:32:47,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-13 09:32:47,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:32:47,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:32:47,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-13 09:32:47,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 09:32:47,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:32:48,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:32:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:32:48,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:32:48,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:32:48,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:32:48,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:32:48,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:32:48,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:32:48,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:32:48,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:32:48,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:32:48,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:32:48,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:32:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:32:48,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:32:48,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:32:48,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 09:32:48,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:32:48,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-13 09:32:48,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:32:48,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:32:48,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:32:48,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 09:32:48,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:32:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:32:48,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958058222] [2020-10-13 09:32:48,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:32:48,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:32:48,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015082761] [2020-10-13 09:32:48,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:32:48,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:32:48,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:32:48,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:32:48,244 INFO L87 Difference]: Start difference. First operand 1002 states and 1408 transitions. Second operand 5 states. [2020-10-13 09:33:02,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:33:02,141 INFO L93 Difference]: Finished difference Result 2896 states and 4091 transitions. [2020-10-13 09:33:02,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:33:02,144 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-10-13 09:33:02,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:33:02,153 INFO L225 Difference]: With dead ends: 2896 [2020-10-13 09:33:02,153 INFO L226 Difference]: Without dead ends: 1900 [2020-10-13 09:33:02,156 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 09:33:02,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2020-10-13 09:33:02,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1896. [2020-10-13 09:33:02,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-10-13 09:33:02,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2489 transitions. [2020-10-13 09:33:02,202 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2489 transitions. Word has length 152 [2020-10-13 09:33:02,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:33:02,202 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2489 transitions. [2020-10-13 09:33:02,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:33:02,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2489 transitions. [2020-10-13 09:33:02,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-13 09:33:02,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:33:02,205 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, 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] [2020-10-13 09:33:02,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 09:33:02,205 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:33:02,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:33:02,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1997038976, now seen corresponding path program 1 times [2020-10-13 09:33:02,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:33:02,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853269551] [2020-10-13 09:33:02,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:33:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:33:02,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:33:02,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:33:03,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:33:03,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 09:33:03,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 09:33:03,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1136 [2020-10-13 09:33:03,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:33:03,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:33:03,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 100 [2020-10-13 09:33:03,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 09:33:03,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:33:03,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:33:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:33:03,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:33:03,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:33:03,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:33:03,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:33:03,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:33:03,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:33:03,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:33:03,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:33:03,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:33:03,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:33:03,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:33:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:33:03,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:33:03,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:33:03,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 09:33:03,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:33:03,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-13 09:33:03,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:33:03,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:33:03,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:33:03,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-13 09:33:03,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:33:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:33:03,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853269551] [2020-10-13 09:33:03,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:33:03,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:33:03,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349233983] [2020-10-13 09:33:03,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:33:03,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:33:03,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:33:03,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:33:03,714 INFO L87 Difference]: Start difference. First operand 1896 states and 2489 transitions. Second operand 5 states. [2020-10-13 09:33:11,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:33:11,992 INFO L93 Difference]: Finished difference Result 4673 states and 6270 transitions. [2020-10-13 09:33:11,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:33:11,994 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2020-10-13 09:33:11,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:33:12,008 INFO L225 Difference]: With dead ends: 4673 [2020-10-13 09:33:12,008 INFO L226 Difference]: Without dead ends: 2783 [2020-10-13 09:33:12,013 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 09:33:12,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2020-10-13 09:33:12,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2779. [2020-10-13 09:33:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2779 states. [2020-10-13 09:33:12,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 3577 transitions. [2020-10-13 09:33:12,092 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 3577 transitions. Word has length 155 [2020-10-13 09:33:12,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:33:12,092 INFO L479 AbstractCegarLoop]: Abstraction has 2779 states and 3577 transitions. [2020-10-13 09:33:12,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:33:12,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 3577 transitions. [2020-10-13 09:33:12,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-13 09:33:12,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:33:12,096 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, 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] [2020-10-13 09:33:12,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 09:33:12,097 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:33:12,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:33:12,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1350710971, now seen corresponding path program 1 times [2020-10-13 09:33:12,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:33:12,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888534552] [2020-10-13 09:33:12,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:33:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:33:12,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:33:12,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:33:12,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:33:12,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-13 09:33:12,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 09:33:12,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 723 [2020-10-13 09:33:12,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:33:12,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:33:12,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-13 09:33:12,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 09:33:12,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:33:12,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:33:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:33:12,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:33:12,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:33:12,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:33:12,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:33:12,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:33:12,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:33:12,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:33:12,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:33:12,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:33:12,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:33:12,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:33:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:33:13,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:33:13,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:33:13,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 09:33:13,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:33:13,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-13 09:33:13,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:33:13,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:33:13,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:33:13,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-13 09:33:13,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:33:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:33:13,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888534552] [2020-10-13 09:33:13,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:33:13,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:33:13,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102406754] [2020-10-13 09:33:13,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:33:13,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:33:13,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:33:13,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:33:13,207 INFO L87 Difference]: Start difference. First operand 2779 states and 3577 transitions. Second operand 5 states. [2020-10-13 09:33:28,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:33:28,682 INFO L93 Difference]: Finished difference Result 6891 states and 9133 transitions. [2020-10-13 09:33:28,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:33:28,686 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 162 [2020-10-13 09:33:28,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:33:28,703 INFO L225 Difference]: With dead ends: 6891 [2020-10-13 09:33:28,704 INFO L226 Difference]: Without dead ends: 4118 [2020-10-13 09:33:28,711 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 09:33:28,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4118 states. [2020-10-13 09:33:28,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4118 to 4105. [2020-10-13 09:33:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4105 states. [2020-10-13 09:33:28,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 5241 transitions. [2020-10-13 09:33:28,807 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 5241 transitions. Word has length 162 [2020-10-13 09:33:28,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:33:28,808 INFO L479 AbstractCegarLoop]: Abstraction has 4105 states and 5241 transitions. [2020-10-13 09:33:28,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:33:28,808 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 5241 transitions. [2020-10-13 09:33:28,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-13 09:33:28,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:33:28,812 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, 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] [2020-10-13 09:33:28,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 09:33:28,812 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:33:28,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:33:28,813 INFO L82 PathProgramCache]: Analyzing trace with hash -871933874, now seen corresponding path program 1 times [2020-10-13 09:33:28,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:33:28,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978879734] [2020-10-13 09:33:28,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:33:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:33:28,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:33:29,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:33:29,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:33:29,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:33:31,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:33:31,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-13 09:33:31,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 09:33:31,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2928 [2020-10-13 09:33:31,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:33:31,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 09:33:31,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-13 09:33:31,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 09:33:31,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:33:32,156 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2020-10-13 09:33:32,320 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-10-13 09:33:32,544 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2020-10-13 09:33:32,723 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2020-10-13 09:33:32,910 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2020-10-13 09:33:33,046 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2020-10-13 09:33:33,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:33:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:33:33,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:33:33,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:33:33,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:33:33,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:33:33,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:33:33,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:33:33,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:33:33,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:33:33,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:33:33,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:33:33,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:33:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:33:33,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:33:33,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:33:33,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 09:33:33,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:33:33,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-13 09:33:33,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:33:33,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:33:33,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:33:33,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-13 09:33:33,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:33:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:33:33,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978879734] [2020-10-13 09:33:33,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:33:33,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 09:33:33,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57542475] [2020-10-13 09:33:33,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 09:33:33,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:33:33,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 09:33:33,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 09:33:33,497 INFO L87 Difference]: Start difference. First operand 4105 states and 5241 transitions. Second operand 11 states. [2020-10-13 09:33:36,530 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-13 09:33:36,787 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-13 09:33:37,489 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-13 09:33:37,802 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-13 09:33:38,124 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-13 09:33:38,346 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-13 09:33:50,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:33:50,555 INFO L93 Difference]: Finished difference Result 8266 states and 10564 transitions. [2020-10-13 09:33:50,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 09:33:50,559 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 168 [2020-10-13 09:33:50,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:33:50,581 INFO L225 Difference]: With dead ends: 8266 [2020-10-13 09:33:50,581 INFO L226 Difference]: Without dead ends: 4109 [2020-10-13 09:33:50,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2020-10-13 09:33:50,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4109 states. [2020-10-13 09:33:50,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4109 to 4105. [2020-10-13 09:33:50,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4105 states. [2020-10-13 09:33:50,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 5235 transitions. [2020-10-13 09:33:50,705 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 5235 transitions. Word has length 168 [2020-10-13 09:33:50,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:33:50,706 INFO L479 AbstractCegarLoop]: Abstraction has 4105 states and 5235 transitions. [2020-10-13 09:33:50,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 09:33:50,706 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 5235 transitions. [2020-10-13 09:33:50,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-13 09:33:50,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:33:50,711 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, 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, 1, 1, 1, 1, 1] [2020-10-13 09:33:50,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 09:33:50,712 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:33:50,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:33:50,713 INFO L82 PathProgramCache]: Analyzing trace with hash 185914881, now seen corresponding path program 1 times [2020-10-13 09:33:50,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:33:50,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740943673] [2020-10-13 09:33:50,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:33:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:33:50,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:33:50,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:33:52,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:33:53,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:33:53,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-13 09:33:53,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:33:53,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2353 [2020-10-13 09:33:53,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:33:53,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:33:53,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 138 [2020-10-13 09:33:53,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 09:33:53,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:33:53,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:33:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:33:53,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:33:53,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:33:53,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:33:53,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:33:53,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:33:53,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:33:53,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:33:53,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:33:53,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:33:53,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:33:53,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:33:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:33:53,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:33:53,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:33:53,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 09:33:53,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:33:53,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-13 09:33:53,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:33:53,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:33:53,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:33:53,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-13 09:33:53,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:33:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:33:53,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740943673] [2020-10-13 09:33:53,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:33:53,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:33:53,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211397141] [2020-10-13 09:33:53,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:33:53,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:33:53,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:33:53,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:33:53,723 INFO L87 Difference]: Start difference. First operand 4105 states and 5235 transitions. Second operand 5 states. [2020-10-13 09:34:08,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:34:08,274 INFO L93 Difference]: Finished difference Result 8238 states and 10524 transitions. [2020-10-13 09:34:08,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:34:08,276 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 193 [2020-10-13 09:34:08,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:34:08,295 INFO L225 Difference]: With dead ends: 8238 [2020-10-13 09:34:08,295 INFO L226 Difference]: Without dead ends: 4109 [2020-10-13 09:34:08,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:34:08,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4109 states. [2020-10-13 09:34:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4109 to 4105. [2020-10-13 09:34:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4105 states. [2020-10-13 09:34:08,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 5229 transitions. [2020-10-13 09:34:08,415 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 5229 transitions. Word has length 193 [2020-10-13 09:34:08,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:34:08,415 INFO L479 AbstractCegarLoop]: Abstraction has 4105 states and 5229 transitions. [2020-10-13 09:34:08,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:34:08,416 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 5229 transitions. [2020-10-13 09:34:08,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-13 09:34:08,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:34:08,423 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 09:34:08,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 09:34:08,424 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:34:08,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:34:08,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1091996200, now seen corresponding path program 1 times [2020-10-13 09:34:08,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:34:08,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678887281] [2020-10-13 09:34:08,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:34:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:34:08,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:08,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:09,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:09,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:10,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:11,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:34:11,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-13 09:34:11,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 09:34:11,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2894 [2020-10-13 09:34:11,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:34:11,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 09:34:11,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 152 [2020-10-13 09:34:11,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 09:34:11,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:34:11,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:34:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:34:11,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:11,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:34:11,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:34:11,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:34:11,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:34:11,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:34:11,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:34:11,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:34:11,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:34:11,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:34:11,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:34:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:34:11,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:11,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:34:11,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 09:34:11,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:34:11,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-13 09:34:11,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:34:11,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 09:34:11,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:34:11,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-13 09:34:11,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:34:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:34:12,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678887281] [2020-10-13 09:34:12,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:34:12,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 09:34:12,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819105989] [2020-10-13 09:34:12,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 09:34:12,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:34:12,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 09:34:12,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:34:12,052 INFO L87 Difference]: Start difference. First operand 4105 states and 5229 transitions. Second operand 6 states. [2020-10-13 09:34:32,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:34:32,389 INFO L93 Difference]: Finished difference Result 12255 states and 15963 transitions. [2020-10-13 09:34:32,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 09:34:32,394 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 209 [2020-10-13 09:34:32,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:34:32,428 INFO L225 Difference]: With dead ends: 12255 [2020-10-13 09:34:32,429 INFO L226 Difference]: Without dead ends: 8100 [2020-10-13 09:34:32,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 09:34:32,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8100 states. [2020-10-13 09:34:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8100 to 8089. [2020-10-13 09:34:32,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8089 states. [2020-10-13 09:34:32,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8089 states to 8089 states and 10273 transitions. [2020-10-13 09:34:32,643 INFO L78 Accepts]: Start accepts. Automaton has 8089 states and 10273 transitions. Word has length 209 [2020-10-13 09:34:32,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:34:32,643 INFO L479 AbstractCegarLoop]: Abstraction has 8089 states and 10273 transitions. [2020-10-13 09:34:32,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 09:34:32,643 INFO L276 IsEmpty]: Start isEmpty. Operand 8089 states and 10273 transitions. [2020-10-13 09:34:32,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-13 09:34:32,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:34:32,649 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 09:34:32,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 09:34:32,649 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:34:32,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:34:32,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1037603302, now seen corresponding path program 1 times [2020-10-13 09:34:32,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:34:32,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997314749] [2020-10-13 09:34:32,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:34:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:34:32,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:32,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:33,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:33,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:33,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:34:33,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-13 09:34:33,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 09:34:33,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 786 [2020-10-13 09:34:33,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:34:33,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:34:33,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 152 [2020-10-13 09:34:33,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:34:33,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:34:33,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:34:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:34:33,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:33,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:34:33,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:34:33,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:34:33,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:34:33,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:34:33,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:34:33,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:34:33,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:34:33,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:34:33,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:34:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:34:33,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:33,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:34:33,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 09:34:33,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:34:33,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-13 09:34:33,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:34:33,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:34:33,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 137 [2020-10-13 09:34:33,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:34:33,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:34:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:34:33,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997314749] [2020-10-13 09:34:33,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 09:34:33,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 09:34:33,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194885055] [2020-10-13 09:34:33,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:34:33,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:34:33,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:34:33,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:34:33,876 INFO L87 Difference]: Start difference. First operand 8089 states and 10273 transitions. Second operand 5 states. [2020-10-13 09:34:50,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:34:50,424 INFO L93 Difference]: Finished difference Result 24063 states and 31181 transitions. [2020-10-13 09:34:50,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:34:50,430 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 209 [2020-10-13 09:34:50,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:34:50,496 INFO L225 Difference]: With dead ends: 24063 [2020-10-13 09:34:50,496 INFO L226 Difference]: Without dead ends: 15979 [2020-10-13 09:34:50,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:34:50,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15979 states. [2020-10-13 09:34:50,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15979 to 15971. [2020-10-13 09:34:50,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15971 states. [2020-10-13 09:34:51,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15971 states to 15971 states and 19226 transitions. [2020-10-13 09:34:51,023 INFO L78 Accepts]: Start accepts. Automaton has 15971 states and 19226 transitions. Word has length 209 [2020-10-13 09:34:51,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:34:51,024 INFO L479 AbstractCegarLoop]: Abstraction has 15971 states and 19226 transitions. [2020-10-13 09:34:51,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:34:51,025 INFO L276 IsEmpty]: Start isEmpty. Operand 15971 states and 19226 transitions. [2020-10-13 09:34:51,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-13 09:34:51,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:34:51,032 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, 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, 1, 1, 1, 1, 1, 1, 1, 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 09:34:51,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 09:34:51,032 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:34:51,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:34:51,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1658218090, now seen corresponding path program 1 times [2020-10-13 09:34:51,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:34:51,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754298423] [2020-10-13 09:34:51,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:34:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:34:51,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:51,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:52,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking...