/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 12:21:54,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 12:21:54,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 12:21:54,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 12:21:54,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 12:21:54,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 12:21:54,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 12:21:54,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 12:21:54,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 12:21:54,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 12:21:54,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 12:21:54,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 12:21:54,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 12:21:54,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 12:21:54,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 12:21:54,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 12:21:54,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 12:21:54,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 12:21:54,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 12:21:54,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 12:21:54,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 12:21:54,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 12:21:54,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 12:21:54,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 12:21:54,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 12:21:54,445 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 12:21:54,445 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 12:21:54,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 12:21:54,450 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 12:21:54,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 12:21:54,452 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 12:21:54,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 12:21:54,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 12:21:54,456 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 12:21:54,466 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 12:21:54,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 12:21:54,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 12:21:54,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 12:21:54,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 12:21:54,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 12:21:54,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 12:21:54,474 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 12:21:54,525 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 12:21:54,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 12:21:54,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 12:21:54,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 12:21:54,528 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 12:21:54,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 12:21:54,529 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 12:21:54,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 12:21:54,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 12:21:54,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 12:21:54,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 12:21:54,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 12:21:54,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 12:21:54,531 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 12:21:54,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 12:21:54,532 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 12:21:54,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 12:21:54,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 12:21:54,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 12:21:54,533 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 12:21:54,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 12:21:54,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:21:54,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 12:21:54,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 12:21:54,534 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 12:21:54,534 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 12:21:54,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 12:21:54,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 12:21:54,535 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 12:21:54,535 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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-09-25 12:21:55,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 12:21:55,063 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 12:21:55,068 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 12:21:55,071 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 12:21:55,071 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 12:21:55,073 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label39.c [2020-09-25 12:21:55,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c8a3b943f/a0520add25b64569b727dd2c438de6e3/FLAGd70d5f360 [2020-09-25 12:21:55,838 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 12:21:55,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label39.c [2020-09-25 12:21:55,851 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c8a3b943f/a0520add25b64569b727dd2c438de6e3/FLAGd70d5f360 [2020-09-25 12:21:56,044 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c8a3b943f/a0520add25b64569b727dd2c438de6e3 [2020-09-25 12:21:56,058 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 12:21:56,066 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 12:21:56,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 12:21:56,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 12:21:56,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 12:21:56,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:21:56" (1/1) ... [2020-09-25 12:21:56,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e37eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:56, skipping insertion in model container [2020-09-25 12:21:56,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:21:56" (1/1) ... [2020-09-25 12:21:56,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 12:21:56,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 12:21:56,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:21:56,646 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 12:21:56,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:21:56,894 INFO L208 MainTranslator]: Completed translation [2020-09-25 12:21:56,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:56 WrapperNode [2020-09-25 12:21:56,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 12:21:56,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 12:21:56,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 12:21:56,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 12:21:56,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:56" (1/1) ... [2020-09-25 12:21:56,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:56" (1/1) ... [2020-09-25 12:21:56,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:56" (1/1) ... [2020-09-25 12:21:56,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:56" (1/1) ... [2020-09-25 12:21:56,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:56" (1/1) ... [2020-09-25 12:21:56,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:56" (1/1) ... [2020-09-25 12:21:57,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:56" (1/1) ... [2020-09-25 12:21:57,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 12:21:57,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 12:21:57,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 12:21:57,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 12:21:57,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:56" (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 12:21:57,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 12:21:57,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 12:21:57,115 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 12:21:57,115 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 12:21:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 12:21:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 12:21:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 12:21:57,116 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 12:21:57,117 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 12:21:57,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 12:21:57,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 12:21:58,496 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 12:21:58,497 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 12:21:58,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:21:58 BoogieIcfgContainer [2020-09-25 12:21:58,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 12:21:58,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 12:21:58,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 12:21:58,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 12:21:58,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:21:56" (1/3) ... [2020-09-25 12:21:58,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f7315f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:21:58, skipping insertion in model container [2020-09-25 12:21:58,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:21:56" (2/3) ... [2020-09-25 12:21:58,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f7315f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:21:58, skipping insertion in model container [2020-09-25 12:21:58,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:21:58" (3/3) ... [2020-09-25 12:21:58,516 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label39.c [2020-09-25 12:21:58,528 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 12:21:58,539 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 12:21:58,561 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 12:21:58,599 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 12:21:58,600 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 12:21:58,600 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 12:21:58,600 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 12:21:58,600 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 12:21:58,600 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 12:21:58,600 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 12:21:58,600 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 12:21:58,642 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 12:21:58,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-09-25 12:21:58,665 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:21:58,667 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] [2020-09-25 12:21:58,667 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:21:58,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:21:58,674 INFO L82 PathProgramCache]: Analyzing trace with hash -2068005297, now seen corresponding path program 1 times [2020-09-25 12:21:58,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:21:58,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766651903] [2020-09-25 12:21:58,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:21:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:59,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:59,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:59,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:00,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:01,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:02,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:03,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:03,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-09-25 12:22:03,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 12:22:03,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 12:22:03,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:03,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:03,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:22:03,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 12:22:03,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-09-25 12:22:03,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 12:22:04,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:22:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:04,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:04,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:04,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 12:22:04,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:22:04,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-25 12:22:04,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:04,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:04,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:22:04,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:22:04,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 12:22:04,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 12:22:04,342 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 12:22:04,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766651903] [2020-09-25 12:22:04,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:22:04,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 12:22:04,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86636837] [2020-09-25 12:22:04,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 12:22:04,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:22:04,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 12:22:04,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 12:22:04,383 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 12:22:06,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:22:06,490 INFO L93 Difference]: Finished difference Result 1268 states and 1667 transitions. [2020-09-25 12:22:06,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 12:22:06,493 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-09-25 12:22:06,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:22:06,516 INFO L225 Difference]: With dead ends: 1268 [2020-09-25 12:22:06,517 INFO L226 Difference]: Without dead ends: 694 [2020-09-25 12:22:06,526 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 12:22:06,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2020-09-25 12:22:06,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 603. [2020-09-25 12:22:06,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-09-25 12:22:06,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 719 transitions. [2020-09-25 12:22:06,651 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 719 transitions. Word has length 160 [2020-09-25 12:22:06,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:22:06,653 INFO L479 AbstractCegarLoop]: Abstraction has 603 states and 719 transitions. [2020-09-25 12:22:06,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 12:22:06,653 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 719 transitions. [2020-09-25 12:22:06,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-09-25 12:22:06,671 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:22:06,672 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-09-25 12:22:06,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 12:22:06,672 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:22:06,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:22:06,673 INFO L82 PathProgramCache]: Analyzing trace with hash 305686135, now seen corresponding path program 1 times [2020-09-25 12:22:06,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:22:06,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091734693] [2020-09-25 12:22:06,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:22:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:06,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:06,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:07,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:07,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:11,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:11,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-09-25 12:22:11,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 12:22:11,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-25 12:22:11,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:11,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:11,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 12:22:11,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-25 12:22:11,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-09-25 12:22:11,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 12:22:12,325 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-09-25 12:22:12,455 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-09-25 12:22:12,640 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2020-09-25 12:22:12,780 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2020-09-25 12:22:12,917 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 36 [2020-09-25 12:22:13,046 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2020-09-25 12:22:13,203 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 32 [2020-09-25 12:22:13,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:22:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:13,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:13,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:13,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 12:22:13,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:22:13,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 12:22:13,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:13,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:13,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:22:13,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:22:13,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:22:13,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-25 12:22:13,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 12:22:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:13,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:13,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:13,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 12:22:13,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:22:13,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-25 12:22:13,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:13,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:13,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 12:22:13,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:22:13,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 12:22:13,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:22:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:22:13,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091734693] [2020-09-25 12:22:13,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:22:13,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 12:22:13,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770647167] [2020-09-25 12:22:13,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 12:22:13,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:22:13,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 12:22:13,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-09-25 12:22:13,848 INFO L87 Difference]: Start difference. First operand 603 states and 719 transitions. Second operand 14 states. [2020-09-25 12:22:14,527 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-09-25 12:22:14,705 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-09-25 12:22:15,096 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 92 [2020-09-25 12:22:15,570 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 91 [2020-09-25 12:22:15,942 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 90 [2020-09-25 12:22:16,828 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 89 [2020-09-25 12:22:17,687 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2020-09-25 12:22:18,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:22:18,345 INFO L93 Difference]: Finished difference Result 1284 states and 1593 transitions. [2020-09-25 12:22:18,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 12:22:18,346 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 181 [2020-09-25 12:22:18,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:22:18,352 INFO L225 Difference]: With dead ends: 1284 [2020-09-25 12:22:18,352 INFO L226 Difference]: Without dead ends: 705 [2020-09-25 12:22:18,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2020-09-25 12:22:18,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2020-09-25 12:22:18,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 684. [2020-09-25 12:22:18,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2020-09-25 12:22:18,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 809 transitions. [2020-09-25 12:22:18,390 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 809 transitions. Word has length 181 [2020-09-25 12:22:18,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:22:18,391 INFO L479 AbstractCegarLoop]: Abstraction has 684 states and 809 transitions. [2020-09-25 12:22:18,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 12:22:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 809 transitions. [2020-09-25 12:22:18,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-09-25 12:22:18,396 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:22:18,396 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:22:18,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 12:22:18,397 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:22:18,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:22:18,397 INFO L82 PathProgramCache]: Analyzing trace with hash -166930083, now seen corresponding path program 1 times [2020-09-25 12:22:18,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:22:18,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349384400] [2020-09-25 12:22:18,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:22:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:18,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:18,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:19,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:19,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:20,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:21,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:22,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:23,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:23,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:23,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-09-25 12:22:23,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 12:22:23,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 12:22:23,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:23,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:23,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 12:22:23,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 12:22:23,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-09-25 12:22:23,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:22:24,111 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-09-25 12:22:24,282 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2020-09-25 12:22:24,540 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 50 [2020-09-25 12:22:24,775 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 46 [2020-09-25 12:22:24,992 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 42 [2020-09-25 12:22:25,194 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 38 [2020-09-25 12:22:25,385 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 34 [2020-09-25 12:22:25,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:22:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:25,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:25,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:25,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 12:22:25,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:22:25,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-25 12:22:25,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:25,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:25,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:22:25,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:22:25,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 12:22:25,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:22:25,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 12:22:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:25,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:25,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:25,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:25,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 12:22:25,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:22:25,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-09-25 12:22:25,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:25,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:25,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:22:25,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:22:25,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 12:22:25,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 12:22:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:22:25,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349384400] [2020-09-25 12:22:25,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:22:25,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 12:22:25,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167649759] [2020-09-25 12:22:25,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 12:22:26,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:22:26,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 12:22:26,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-09-25 12:22:26,000 INFO L87 Difference]: Start difference. First operand 684 states and 809 transitions. Second operand 19 states. [2020-09-25 12:22:27,099 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-09-25 12:22:27,335 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-09-25 12:22:27,701 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 93 [2020-09-25 12:22:28,049 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-09-25 12:22:28,477 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 112 [2020-09-25 12:22:28,791 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-09-25 12:22:29,320 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 109 [2020-09-25 12:22:29,824 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 106 [2020-09-25 12:22:30,120 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-09-25 12:22:31,157 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 86 [2020-09-25 12:22:31,656 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 92 [2020-09-25 12:22:32,051 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 89 [2020-09-25 12:22:32,256 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-09-25 12:22:32,662 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 103 [2020-09-25 12:22:32,971 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-09-25 12:22:33,972 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-09-25 12:22:34,378 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2020-09-25 12:22:34,983 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 98 [2020-09-25 12:22:35,856 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-09-25 12:22:36,143 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2020-09-25 12:22:36,638 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2020-09-25 12:22:37,272 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2020-09-25 12:22:38,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:22:38,662 INFO L93 Difference]: Finished difference Result 2205 states and 2811 transitions. [2020-09-25 12:22:38,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-25 12:22:38,663 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 182 [2020-09-25 12:22:38,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:22:38,682 INFO L225 Difference]: With dead ends: 2205 [2020-09-25 12:22:38,682 INFO L226 Difference]: Without dead ends: 1545 [2020-09-25 12:22:38,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=682, Invalid=1768, Unknown=0, NotChecked=0, Total=2450 [2020-09-25 12:22:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-09-25 12:22:38,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1282. [2020-09-25 12:22:38,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1282 states. [2020-09-25 12:22:38,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1520 transitions. [2020-09-25 12:22:38,773 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1520 transitions. Word has length 182 [2020-09-25 12:22:38,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:22:38,774 INFO L479 AbstractCegarLoop]: Abstraction has 1282 states and 1520 transitions. [2020-09-25 12:22:38,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 12:22:38,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1520 transitions. [2020-09-25 12:22:38,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-09-25 12:22:38,784 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:22:38,784 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 12:22:38,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 12:22:38,785 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:22:38,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:22:38,785 INFO L82 PathProgramCache]: Analyzing trace with hash 621217626, now seen corresponding path program 1 times [2020-09-25 12:22:38,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:22:38,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495572982] [2020-09-25 12:22:38,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:22:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:38,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:38,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:39,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:39,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:41,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:41,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:41,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:43,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:43,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:43,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-09-25 12:22:43,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 12:22:43,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-09-25 12:22:43,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:43,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:43,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:22:43,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-09-25 12:22:43,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-09-25 12:22:43,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:22:44,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:22:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:44,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:44,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:44,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 12:22:44,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:22:44,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 12:22:44,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:44,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:44,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:22:44,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:22:44,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:22:44,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 12:22:44,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 12:22:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:44,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:44,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:44,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 12:22:44,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:22:44,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-25 12:22:44,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:44,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:44,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:22:44,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:22:44,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 12:22:44,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:22:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:22:44,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495572982] [2020-09-25 12:22:44,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:22:44,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 12:22:44,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776170804] [2020-09-25 12:22:44,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:22:44,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:22:44,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:22:44,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:22:44,160 INFO L87 Difference]: Start difference. First operand 1282 states and 1520 transitions. Second operand 5 states. [2020-09-25 12:22:46,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:22:46,057 INFO L93 Difference]: Finished difference Result 3205 states and 3938 transitions. [2020-09-25 12:22:46,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 12:22:46,058 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 189 [2020-09-25 12:22:46,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:22:46,069 INFO L225 Difference]: With dead ends: 3205 [2020-09-25 12:22:46,070 INFO L226 Difference]: Without dead ends: 1947 [2020-09-25 12:22:46,075 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 12:22:46,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2020-09-25 12:22:46,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1570. [2020-09-25 12:22:46,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1570 states. [2020-09-25 12:22:46,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 1888 transitions. [2020-09-25 12:22:46,135 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 1888 transitions. Word has length 189 [2020-09-25 12:22:46,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:22:46,144 INFO L479 AbstractCegarLoop]: Abstraction has 1570 states and 1888 transitions. [2020-09-25 12:22:46,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:22:46,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 1888 transitions. [2020-09-25 12:22:46,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-09-25 12:22:46,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:22:46,154 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-09-25 12:22:46,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 12:22:46,154 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:22:46,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:22:46,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1816533928, now seen corresponding path program 1 times [2020-09-25 12:22:46,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:22:46,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192441964] [2020-09-25 12:22:46,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:22:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:46,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:46,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:46,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:46,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:46,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:46,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking...