/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:39:21,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:39:21,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:39:21,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:39:21,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:39:21,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:39:21,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:39:21,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:39:21,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:39:21,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:39:21,503 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:39:21,504 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:39:21,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:39:21,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:39:21,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:39:21,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:39:21,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:39:21,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:39:21,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:39:21,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:39:21,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:39:21,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:39:21,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:39:21,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:39:21,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:39:21,528 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:39:21,528 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:39:21,529 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:39:21,530 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:39:21,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:39:21,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:39:21,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:39:21,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:39:21,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:39:21,539 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:39:21,540 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:39:21,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:39:21,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:39:21,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:39:21,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:39:21,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:39:21,545 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:39:21,594 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:39:21,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:39:21,596 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:39:21,596 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:39:21,597 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:39:21,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:39:21,597 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:39:21,598 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:39:21,598 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:39:21,598 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:39:21,599 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:39:21,599 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:39:21,599 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:39:21,600 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:39:21,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:39:21,601 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:39:21,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:39:21,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:39:21,601 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:39:21,601 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:39:21,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:39:21,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:39:21,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:39:21,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:39:21,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:39:21,603 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:39:21,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:39:21,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:39:21,603 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:39:21,604 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:39:22,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:39:22,046 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:39:22,050 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:39:22,051 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:39:22,052 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:39:22,053 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label31.c [2020-09-24 21:39:22,130 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/66ea1b7d1/1c738f923b214a9abf84309dd55045cc/FLAGb154e15ce [2020-09-24 21:39:22,775 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:39:22,778 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label31.c [2020-09-24 21:39:22,803 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/66ea1b7d1/1c738f923b214a9abf84309dd55045cc/FLAGb154e15ce [2020-09-24 21:39:22,980 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/66ea1b7d1/1c738f923b214a9abf84309dd55045cc [2020-09-24 21:39:22,994 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:39:23,001 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:39:23,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:39:23,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:39:23,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:39:23,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:39:22" (1/1) ... [2020-09-24 21:39:23,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@674884e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:23, skipping insertion in model container [2020-09-24 21:39:23,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:39:22" (1/1) ... [2020-09-24 21:39:23,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:39:23,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:39:23,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:39:23,567 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:39:23,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:39:23,797 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:39:23,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:23 WrapperNode [2020-09-24 21:39:23,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:39:23,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:39:23,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:39:23,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:39:23,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:23" (1/1) ... [2020-09-24 21:39:23,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:23" (1/1) ... [2020-09-24 21:39:23,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:23" (1/1) ... [2020-09-24 21:39:23,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:23" (1/1) ... [2020-09-24 21:39:23,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:23" (1/1) ... [2020-09-24 21:39:23,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:23" (1/1) ... [2020-09-24 21:39:23,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:23" (1/1) ... [2020-09-24 21:39:23,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:39:23,906 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:39:23,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:39:23,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:39:23,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:39:23,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:39:23,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:39:23,982 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:39:23,982 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:39:23,982 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:39:23,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:39:23,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:39:23,983 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:39:23,983 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:39:23,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:39:23,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:39:25,260 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:39:25,260 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:39:25,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:39:25 BoogieIcfgContainer [2020-09-24 21:39:25,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:39:25,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:39:25,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:39:25,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:39:25,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:39:22" (1/3) ... [2020-09-24 21:39:25,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc6cb6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:39:25, skipping insertion in model container [2020-09-24 21:39:25,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:23" (2/3) ... [2020-09-24 21:39:25,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc6cb6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:39:25, skipping insertion in model container [2020-09-24 21:39:25,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:39:25" (3/3) ... [2020-09-24 21:39:25,288 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label31.c [2020-09-24 21:39:25,300 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:39:25,319 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:39:25,338 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:39:25,375 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:39:25,375 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:39:25,375 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:39:25,376 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:39:25,376 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:39:25,376 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:39:25,376 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:39:25,376 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:39:25,410 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 21:39:25,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-09-24 21:39:25,430 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:25,431 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] [2020-09-24 21:39:25,431 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:25,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:25,438 INFO L82 PathProgramCache]: Analyzing trace with hash -21747025, now seen corresponding path program 1 times [2020-09-24 21:39:25,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:25,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597125458] [2020-09-24 21:39:25,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:25,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:26,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:26,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:26,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:27,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:28,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:28,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:30,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:30,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-09-24 21:39:30,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:39:30,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-24 21:39:30,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:30,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:39:30,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:39:30,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 21:39:30,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:39:31,515 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-09-24 21:39:31,672 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2020-09-24 21:39:31,807 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2020-09-24 21:39:32,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:32,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:32,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:32,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:32,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:32,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-09-24 21:39:32,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:32,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:39:32,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:32,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:39:32,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:39:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:39:32,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597125458] [2020-09-24 21:39:32,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:39:32,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-24 21:39:32,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932975219] [2020-09-24 21:39:32,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:39:32,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:32,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:39:32,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:39:32,682 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 18 states. [2020-09-24 21:39:33,188 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-09-24 21:39:33,376 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-09-24 21:39:33,699 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 111 [2020-09-24 21:39:34,032 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 108 [2020-09-24 21:39:34,636 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 105 [2020-09-24 21:39:35,616 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 102 [2020-09-24 21:39:36,216 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 97 [2020-09-24 21:39:37,352 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2020-09-24 21:39:38,390 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-09-24 21:39:41,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:39:41,171 INFO L93 Difference]: Finished difference Result 1700 states and 2421 transitions. [2020-09-24 21:39:41,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 21:39:41,180 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 120 [2020-09-24 21:39:41,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:39:41,207 INFO L225 Difference]: With dead ends: 1700 [2020-09-24 21:39:41,208 INFO L226 Difference]: Without dead ends: 1101 [2020-09-24 21:39:41,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=348, Invalid=842, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 21:39:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-09-24 21:39:41,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 985. [2020-09-24 21:39:41,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-09-24 21:39:41,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1148 transitions. [2020-09-24 21:39:41,373 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1148 transitions. Word has length 120 [2020-09-24 21:39:41,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:39:41,375 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 1148 transitions. [2020-09-24 21:39:41,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:39:41,375 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1148 transitions. [2020-09-24 21:39:41,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-09-24 21:39:41,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:41,417 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 21:39:41,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:39:41,417 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:41,418 INFO L82 PathProgramCache]: Analyzing trace with hash 2128216958, now seen corresponding path program 1 times [2020-09-24 21:39:41,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:41,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725182865] [2020-09-24 21:39:41,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:41,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:41,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:41,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:41,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:43,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:43,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-09-24 21:39:43,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:39:43,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2021 [2020-09-24 21:39:43,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:43,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:39:43,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:39:43,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-09-24 21:39:43,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:39:43,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:43,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:43,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:43,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:43,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:43,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 21:39:43,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:43,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:39:43,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:43,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:39:43,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:39:43,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:39:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:43,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:43,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:43,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:43,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:39:43,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:39:43,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 21:39:43,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:43,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:39:43,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:43,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:39:43,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:43,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-24 21:39:43,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725182865] [2020-09-24 21:39:43,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:39:43,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 21:39:43,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226092245] [2020-09-24 21:39:43,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:39:43,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:43,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:39:43,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:39:43,796 INFO L87 Difference]: Start difference. First operand 985 states and 1148 transitions. Second operand 6 states. [2020-09-24 21:39:45,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:39:45,821 INFO L93 Difference]: Finished difference Result 2364 states and 2855 transitions. [2020-09-24 21:39:45,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:39:45,822 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2020-09-24 21:39:45,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:39:45,831 INFO L225 Difference]: With dead ends: 2364 [2020-09-24 21:39:45,831 INFO L226 Difference]: Without dead ends: 1467 [2020-09-24 21:39:45,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:39:45,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2020-09-24 21:39:45,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1418. [2020-09-24 21:39:45,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1418 states. [2020-09-24 21:39:45,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 1694 transitions. [2020-09-24 21:39:45,895 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 1694 transitions. Word has length 141 [2020-09-24 21:39:45,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:39:45,896 INFO L479 AbstractCegarLoop]: Abstraction has 1418 states and 1694 transitions. [2020-09-24 21:39:45,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:39:45,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 1694 transitions. [2020-09-24 21:39:45,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-09-24 21:39:45,905 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:45,905 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 21:39:45,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:39:45,905 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:45,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:45,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1461958694, now seen corresponding path program 1 times [2020-09-24 21:39:45,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:45,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480495315] [2020-09-24 21:39:45,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:45,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:46,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:46,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:47,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:49,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:50,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:50,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-09-24 21:39:50,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:39:50,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-24 21:39:50,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:50,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 21:39:50,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:39:50,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-24 21:39:50,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:51,620 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-09-24 21:39:51,831 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2020-09-24 21:39:52,062 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 53 [2020-09-24 21:39:52,312 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 50 [2020-09-24 21:39:52,527 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 46 [2020-09-24 21:39:52,742 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 42 [2020-09-24 21:39:52,940 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 36 [2020-09-24 21:39:53,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:53,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:53,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:53,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:53,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:53,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-24 21:39:53,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:53,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:39:53,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:53,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:39:53,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:53,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:39:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:53,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:53,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:53,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:39:53,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:53,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-24 21:39:53,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:53,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:39:53,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:53,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:39:53,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:53,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 21:39:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:53,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:53,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:53,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:53,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:39:53,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:39:53,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-09-24 21:39:53,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:53,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:39:53,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:53,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:39:53,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:39:53,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480495315] [2020-09-24 21:39:53,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:39:53,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 21:39:53,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719469341] [2020-09-24 21:39:53,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 21:39:53,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:53,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 21:39:53,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:39:53,817 INFO L87 Difference]: Start difference. First operand 1418 states and 1694 transitions. Second operand 23 states. [2020-09-24 21:39:56,713 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 95 [2020-09-24 21:39:57,492 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 92 [2020-09-24 21:39:57,997 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2020-09-24 21:39:58,170 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-09-24 21:39:58,422 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-09-24 21:39:58,851 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-09-24 21:39:59,370 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 113 [2020-09-24 21:39:59,537 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-09-24 21:40:00,584 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 110 [2020-09-24 21:40:00,833 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2020-09-24 21:40:01,560 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 107 [2020-09-24 21:40:02,001 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-09-24 21:40:02,417 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 104 [2020-09-24 21:40:03,527 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 99 [2020-09-24 21:40:05,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:05,219 INFO L93 Difference]: Finished difference Result 4963 states and 6505 transitions. [2020-09-24 21:40:05,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-24 21:40:05,219 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 158 [2020-09-24 21:40:05,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:05,240 INFO L225 Difference]: With dead ends: 4963 [2020-09-24 21:40:05,240 INFO L226 Difference]: Without dead ends: 3633 [2020-09-24 21:40:05,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2020-09-24 21:40:05,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3633 states. [2020-09-24 21:40:05,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3633 to 3210. [2020-09-24 21:40:05,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3210 states. [2020-09-24 21:40:05,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3210 states to 3210 states and 3954 transitions. [2020-09-24 21:40:05,358 INFO L78 Accepts]: Start accepts. Automaton has 3210 states and 3954 transitions. Word has length 158 [2020-09-24 21:40:05,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:05,359 INFO L479 AbstractCegarLoop]: Abstraction has 3210 states and 3954 transitions. [2020-09-24 21:40:05,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 21:40:05,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3210 states and 3954 transitions. [2020-09-24 21:40:05,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-09-24 21:40:05,369 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:05,369 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 21:40:05,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:40:05,370 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:05,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:05,370 INFO L82 PathProgramCache]: Analyzing trace with hash -690061091, now seen corresponding path program 1 times [2020-09-24 21:40:05,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:05,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169351142] [2020-09-24 21:40:05,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:05,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:05,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:06,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:06,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:06,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:10,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:10,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:10,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:10,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-09-24 21:40:10,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:40:10,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-24 21:40:10,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:10,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:40:10,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-09-24 21:40:10,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:40:10,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:10,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:10,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:10,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:10,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:10,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:10,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 21:40:10,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:10,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:40:10,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:10,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:40:10,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:10,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:40:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:10,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:10,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:10,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:40:10,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:10,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 21:40:10,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:10,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:40:10,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:10,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 21:40:10,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:10,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 21:40:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:10,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:10,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:10,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:40:10,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:10,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-24 21:40:10,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:10,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:40:10,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:10,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:40:10,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:40:10,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169351142] [2020-09-24 21:40:10,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:40:10,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 21:40:10,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175344132] [2020-09-24 21:40:10,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:40:10,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:10,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:40:10,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:40:10,734 INFO L87 Difference]: Start difference. First operand 3210 states and 3954 transitions. Second operand 7 states. [2020-09-24 21:40:13,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:13,013 INFO L93 Difference]: Finished difference Result 7392 states and 9309 transitions. [2020-09-24 21:40:13,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 21:40:13,014 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 158 [2020-09-24 21:40:13,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:13,038 INFO L225 Difference]: With dead ends: 7392 [2020-09-24 21:40:13,038 INFO L226 Difference]: Without dead ends: 4426 [2020-09-24 21:40:13,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:40:13,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2020-09-24 21:40:13,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 3850. [2020-09-24 21:40:13,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3850 states. [2020-09-24 21:40:13,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3850 states to 3850 states and 4699 transitions. [2020-09-24 21:40:13,174 INFO L78 Accepts]: Start accepts. Automaton has 3850 states and 4699 transitions. Word has length 158 [2020-09-24 21:40:13,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:13,177 INFO L479 AbstractCegarLoop]: Abstraction has 3850 states and 4699 transitions. [2020-09-24 21:40:13,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:40:13,177 INFO L276 IsEmpty]: Start isEmpty. Operand 3850 states and 4699 transitions. [2020-09-24 21:40:13,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-09-24 21:40:13,193 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:13,193 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:40:13,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:40:13,194 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:13,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:13,194 INFO L82 PathProgramCache]: Analyzing trace with hash -837962811, now seen corresponding path program 1 times [2020-09-24 21:40:13,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:13,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286613491] [2020-09-24 21:40:13,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:13,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:13,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:13,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking...