/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 06:44:48,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 06:44:48,356 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 06:44:48,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 06:44:48,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 06:44:48,410 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 06:44:48,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 06:44:48,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 06:44:48,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 06:44:48,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 06:44:48,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 06:44:48,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 06:44:48,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 06:44:48,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 06:44:48,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 06:44:48,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 06:44:48,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 06:44:48,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 06:44:48,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 06:44:48,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 06:44:48,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 06:44:48,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 06:44:48,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 06:44:48,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 06:44:48,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 06:44:48,471 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 06:44:48,471 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 06:44:48,472 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 06:44:48,473 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 06:44:48,476 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 06:44:48,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 06:44:48,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 06:44:48,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 06:44:48,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 06:44:48,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 06:44:48,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 06:44:48,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 06:44:48,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 06:44:48,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 06:44:48,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 06:44:48,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 06:44:48,487 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 06:44:48,532 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 06:44:48,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 06:44:48,535 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 06:44:48,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 06:44:48,535 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 06:44:48,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 06:44:48,536 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 06:44:48,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 06:44:48,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 06:44:48,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 06:44:48,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 06:44:48,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 06:44:48,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 06:44:48,538 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 06:44:48,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 06:44:48,539 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 06:44:48,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 06:44:48,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 06:44:48,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 06:44:48,540 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 06:44:48,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 06:44:48,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:44:48,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 06:44:48,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 06:44:48,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 06:44:48,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 06:44:48,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 06:44:48,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 06:44:48,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 06:44:48,541 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-09-25 06:44:49,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 06:44:49,064 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 06:44:49,072 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 06:44:49,074 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 06:44:49,074 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 06:44:49,075 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label26.c [2020-09-25 06:44:49,174 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e35920b14/5f96941d39524d489780a637f32b8265/FLAGbc1c48940 [2020-09-25 06:44:49,838 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 06:44:49,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label26.c [2020-09-25 06:44:49,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e35920b14/5f96941d39524d489780a637f32b8265/FLAGbc1c48940 [2020-09-25 06:44:50,073 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e35920b14/5f96941d39524d489780a637f32b8265 [2020-09-25 06:44:50,088 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 06:44:50,097 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 06:44:50,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 06:44:50,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 06:44:50,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 06:44:50,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:44:50" (1/1) ... [2020-09-25 06:44:50,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62502cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:44:50, skipping insertion in model container [2020-09-25 06:44:50,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:44:50" (1/1) ... [2020-09-25 06:44:50,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 06:44:50,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 06:44:50,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:44:50,765 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 06:44:50,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:44:50,954 INFO L208 MainTranslator]: Completed translation [2020-09-25 06:44:50,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:44:50 WrapperNode [2020-09-25 06:44:50,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 06:44:50,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 06:44:50,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 06:44:50,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 06:44:50,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:44:50" (1/1) ... [2020-09-25 06:44:50,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:44:50" (1/1) ... [2020-09-25 06:44:50,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:44:50" (1/1) ... [2020-09-25 06:44:50,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:44:50" (1/1) ... [2020-09-25 06:44:51,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:44:50" (1/1) ... [2020-09-25 06:44:51,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:44:50" (1/1) ... [2020-09-25 06:44:51,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:44:50" (1/1) ... [2020-09-25 06:44:51,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 06:44:51,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 06:44:51,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 06:44:51,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 06:44:51,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:44:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:44:51,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 06:44:51,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 06:44:51,149 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 06:44:51,149 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 06:44:51,149 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 06:44:51,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 06:44:51,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 06:44:51,150 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 06:44:51,150 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 06:44:51,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 06:44:51,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 06:44:52,613 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 06:44:52,614 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 06:44:52,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:44:52 BoogieIcfgContainer [2020-09-25 06:44:52,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 06:44:52,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 06:44:52,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 06:44:52,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 06:44:52,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 06:44:50" (1/3) ... [2020-09-25 06:44:52,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41a12f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:44:52, skipping insertion in model container [2020-09-25 06:44:52,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:44:50" (2/3) ... [2020-09-25 06:44:52,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41a12f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:44:52, skipping insertion in model container [2020-09-25 06:44:52,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:44:52" (3/3) ... [2020-09-25 06:44:52,635 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label26.c [2020-09-25 06:44:52,648 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 06:44:52,660 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 06:44:52,685 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 06:44:52,724 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 06:44:52,725 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 06:44:52,725 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 06:44:52,725 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 06:44:52,725 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 06:44:52,726 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 06:44:52,726 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 06:44:52,726 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 06:44:52,761 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 06:44:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-09-25 06:44:52,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:44:52,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:44:52,789 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:44:52,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:44:52,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1114585457, now seen corresponding path program 1 times [2020-09-25 06:44:52,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:44:52,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654812378] [2020-09-25 06:44:52,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:44:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:44:53,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:44:53,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:44:53,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:44:54,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:44:57,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:44:57,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:44:57,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:44:58,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:44:58,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-09-25 06:44:58,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 06:44:58,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-09-25 06:44:58,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:44:58,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:44:58,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:44:58,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 06:44:58,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-09-25 06:44:58,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 06:44:58,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:44:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:44:58,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:44:58,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:44:58,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 06:44:58,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:44:58,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 06:44:58,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:44:58,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:44:58,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:44:58,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:44:58,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 06:44:58,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:44:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:44:58,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654812378] [2020-09-25 06:44:58,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:44:58,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 06:44:58,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279657527] [2020-09-25 06:44:58,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 06:44:58,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:44:58,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 06:44:58,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 06:44:58,566 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 06:45:00,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:45:00,585 INFO L93 Difference]: Finished difference Result 1205 states and 1651 transitions. [2020-09-25 06:45:00,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 06:45:00,588 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2020-09-25 06:45:00,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:45:00,616 INFO L225 Difference]: With dead ends: 1205 [2020-09-25 06:45:00,616 INFO L226 Difference]: Without dead ends: 627 [2020-09-25 06:45:00,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:45:00,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2020-09-25 06:45:00,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 613. [2020-09-25 06:45:00,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2020-09-25 06:45:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 759 transitions. [2020-09-25 06:45:00,731 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 759 transitions. Word has length 162 [2020-09-25 06:45:00,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:45:00,732 INFO L479 AbstractCegarLoop]: Abstraction has 613 states and 759 transitions. [2020-09-25 06:45:00,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 06:45:00,732 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 759 transitions. [2020-09-25 06:45:00,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-09-25 06:45:00,742 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:45:00,743 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:45:00,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 06:45:00,744 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:45:00,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:45:00,744 INFO L82 PathProgramCache]: Analyzing trace with hash 156587372, now seen corresponding path program 1 times [2020-09-25 06:45:00,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:45:00,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384384620] [2020-09-25 06:45:00,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:45:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:45:00,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:00,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:01,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:02,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:04,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:04,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:05,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:05,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:05,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:45:05,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-09-25 06:45:05,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 06:45:05,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 06:45:05,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:45:05,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:45:05,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:45:05,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-09-25 06:45:05,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-09-25 06:45:05,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:45:05,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:45:05,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:45:05,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:05,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:45:05,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 06:45:05,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:45:05,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 06:45:05,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:45:05,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:45:05,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:45:05,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:45:05,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:45:05,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:45:05,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 06:45:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:45:05,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:05,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:45:05,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 06:45:05,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:45:05,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 06:45:05,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:45:05,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:45:05,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:45:05,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:45:05,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 06:45:05,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:45:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:45:06,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384384620] [2020-09-25 06:45:06,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:45:06,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 06:45:06,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103956126] [2020-09-25 06:45:06,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:45:06,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:45:06,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:45:06,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:45:06,044 INFO L87 Difference]: Start difference. First operand 613 states and 759 transitions. Second operand 5 states. [2020-09-25 06:45:08,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:45:08,182 INFO L93 Difference]: Finished difference Result 1519 states and 1962 transitions. [2020-09-25 06:45:08,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 06:45:08,183 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 196 [2020-09-25 06:45:08,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:45:08,189 INFO L225 Difference]: With dead ends: 1519 [2020-09-25 06:45:08,189 INFO L226 Difference]: Without dead ends: 710 [2020-09-25 06:45:08,193 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 [2020-09-25 06:45:08,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2020-09-25 06:45:08,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 700. [2020-09-25 06:45:08,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2020-09-25 06:45:08,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 835 transitions. [2020-09-25 06:45:08,232 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 835 transitions. Word has length 196 [2020-09-25 06:45:08,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:45:08,233 INFO L479 AbstractCegarLoop]: Abstraction has 700 states and 835 transitions. [2020-09-25 06:45:08,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 06:45:08,234 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 835 transitions. [2020-09-25 06:45:08,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-09-25 06:45:08,239 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:45:08,239 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:45:08,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 06:45:08,239 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:45:08,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:45:08,240 INFO L82 PathProgramCache]: Analyzing trace with hash -270211067, now seen corresponding path program 1 times [2020-09-25 06:45:08,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:45:08,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829246360] [2020-09-25 06:45:08,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:45:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:45:08,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:08,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:08,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:08,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:09,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:10,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:13,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:45:13,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-09-25 06:45:13,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 06:45:13,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 06:45:13,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:45:13,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:45:13,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:45:13,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 06:45:13,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 06:45:13,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 06:45:13,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:45:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:45:13,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:13,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:45:13,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 06:45:13,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:45:13,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-25 06:45:13,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:45:13,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:45:13,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:45:13,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:45:13,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 06:45:13,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:45:13,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 06:45:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:45:13,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:13,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:45:13,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 06:45:13,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:45:13,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-09-25 06:45:13,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:45:13,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:45:13,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:45:13,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 06:45:13,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 06:45:13,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:45:13,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-25 06:45:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:45:13,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:13,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:45:13,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 06:45:13,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:45:13,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 06:45:13,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:45:13,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:45:13,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:45:13,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:45:13,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:45:13,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:45:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 39 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 06:45:13,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829246360] [2020-09-25 06:45:13,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:45:13,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 06:45:13,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266469715] [2020-09-25 06:45:13,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 06:45:13,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:45:13,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 06:45:13,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 06:45:13,725 INFO L87 Difference]: Start difference. First operand 700 states and 835 transitions. Second operand 8 states. [2020-09-25 06:45:16,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:45:16,592 INFO L93 Difference]: Finished difference Result 2495 states and 3109 transitions. [2020-09-25 06:45:16,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 06:45:16,592 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 222 [2020-09-25 06:45:16,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:45:16,605 INFO L225 Difference]: With dead ends: 2495 [2020-09-25 06:45:16,605 INFO L226 Difference]: Without dead ends: 1817 [2020-09-25 06:45:16,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-25 06:45:16,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2020-09-25 06:45:16,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1652. [2020-09-25 06:45:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1652 states. [2020-09-25 06:45:16,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 2030 transitions. [2020-09-25 06:45:16,706 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 2030 transitions. Word has length 222 [2020-09-25 06:45:16,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:45:16,708 INFO L479 AbstractCegarLoop]: Abstraction has 1652 states and 2030 transitions. [2020-09-25 06:45:16,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 06:45:16,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 2030 transitions. [2020-09-25 06:45:16,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-09-25 06:45:16,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:45:16,718 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:45:16,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 06:45:16,718 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:45:16,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:45:16,719 INFO L82 PathProgramCache]: Analyzing trace with hash 375157522, now seen corresponding path program 1 times [2020-09-25 06:45:16,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:45:16,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426258088] [2020-09-25 06:45:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:45:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:45:16,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:16,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:16,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:19,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:20,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:21,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:45:21,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-09-25 06:45:21,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 06:45:21,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-25 06:45:21,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:45:21,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:45:21,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:45:21,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 06:45:21,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 06:45:21,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:45:21,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:45:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:45:21,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:21,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:45:21,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 06:45:21,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:45:21,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-25 06:45:21,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:45:21,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:45:21,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:45:21,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:45:21,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 06:45:21,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:45:21,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 06:45:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:45:21,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:22,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:45:22,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 06:45:22,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:45:22,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-09-25 06:45:22,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:45:22,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:45:22,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:45:22,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 06:45:22,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 06:45:22,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:45:22,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-25 06:45:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:45:22,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:22,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:45:22,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 06:45:22,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:45:22,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 06:45:22,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:45:22,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:45:22,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:45:22,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:45:22,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:45:22,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:45:22,267 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 43 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 06:45:22,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426258088] [2020-09-25 06:45:22,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:45:22,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 06:45:22,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143279505] [2020-09-25 06:45:22,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 06:45:22,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:45:22,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 06:45:22,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 06:45:22,270 INFO L87 Difference]: Start difference. First operand 1652 states and 2030 transitions. Second operand 7 states. [2020-09-25 06:45:24,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:45:24,210 INFO L93 Difference]: Finished difference Result 4227 states and 5339 transitions. [2020-09-25 06:45:24,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 06:45:24,211 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 226 [2020-09-25 06:45:24,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:45:24,225 INFO L225 Difference]: With dead ends: 4227 [2020-09-25 06:45:24,226 INFO L226 Difference]: Without dead ends: 2597 [2020-09-25 06:45:24,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-25 06:45:24,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2020-09-25 06:45:24,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2277. [2020-09-25 06:45:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2277 states. [2020-09-25 06:45:24,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 2797 transitions. [2020-09-25 06:45:24,318 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 2797 transitions. Word has length 226 [2020-09-25 06:45:24,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:45:24,319 INFO L479 AbstractCegarLoop]: Abstraction has 2277 states and 2797 transitions. [2020-09-25 06:45:24,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 06:45:24,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 2797 transitions. [2020-09-25 06:45:24,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-09-25 06:45:24,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:45:24,331 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:45:24,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 06:45:24,331 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:45:24,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:45:24,332 INFO L82 PathProgramCache]: Analyzing trace with hash -711105748, now seen corresponding path program 1 times [2020-09-25 06:45:24,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:45:24,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49828311] [2020-09-25 06:45:24,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:45:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:45:24,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:24,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:24,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:25,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:28,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:28,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:29,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:45:29,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-09-25 06:45:29,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 06:45:29,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 06:45:29,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:45:29,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:45:29,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:45:29,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:45:29,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-25 06:45:29,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:45:29,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:45:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:45:29,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:29,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:45:29,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 06:45:29,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:45:29,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-25 06:45:29,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:45:29,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:45:29,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:45:29,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:45:29,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 06:45:29,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:45:29,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 06:45:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:45:29,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:29,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:45:29,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 06:45:29,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:45:29,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-09-25 06:45:29,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:45:29,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:45:29,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:45:29,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 06:45:29,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-25 06:45:29,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:45:29,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-09-25 06:45:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:45:29,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:29,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:45:29,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 06:45:29,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:45:29,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 06:45:29,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:45:29,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:45:29,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:45:29,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:45:29,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:45:29,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:45:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 06:45:29,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49828311] [2020-09-25 06:45:29,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:45:29,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 06:45:29,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19914590] [2020-09-25 06:45:29,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 06:45:29,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:45:29,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 06:45:29,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 06:45:29,749 INFO L87 Difference]: Start difference. First operand 2277 states and 2797 transitions. Second operand 7 states. [2020-09-25 06:45:31,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:45:31,935 INFO L93 Difference]: Finished difference Result 5513 states and 6911 transitions. [2020-09-25 06:45:31,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 06:45:31,936 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 234 [2020-09-25 06:45:31,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:45:31,953 INFO L225 Difference]: With dead ends: 5513 [2020-09-25 06:45:31,953 INFO L226 Difference]: Without dead ends: 3258 [2020-09-25 06:45:31,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-25 06:45:31,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3258 states. [2020-09-25 06:45:32,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3258 to 3058. [2020-09-25 06:45:32,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3058 states. [2020-09-25 06:45:32,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3058 states to 3058 states and 3664 transitions. [2020-09-25 06:45:32,049 INFO L78 Accepts]: Start accepts. Automaton has 3058 states and 3664 transitions. Word has length 234 [2020-09-25 06:45:32,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:45:32,049 INFO L479 AbstractCegarLoop]: Abstraction has 3058 states and 3664 transitions. [2020-09-25 06:45:32,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 06:45:32,050 INFO L276 IsEmpty]: Start isEmpty. Operand 3058 states and 3664 transitions. [2020-09-25 06:45:32,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-09-25 06:45:32,062 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:45:32,062 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:45:32,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 06:45:32,062 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:45:32,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:45:32,063 INFO L82 PathProgramCache]: Analyzing trace with hash -312816025, now seen corresponding path program 1 times [2020-09-25 06:45:32,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:45:32,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775858507] [2020-09-25 06:45:32,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:45:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:45:32,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:32,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:32,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:32,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:34,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:35,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking...