/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=0.5 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 14:40:39,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:40:39,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:40:39,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:40:39,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:40:39,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:40:39,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:40:39,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:40:39,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:40:39,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:40:39,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:40:39,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:40:39,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:40:39,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:40:39,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:40:39,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:40:39,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:40:39,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:40:39,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:40:39,595 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:40:39,597 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:40:39,598 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:40:39,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:40:39,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:40:39,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:40:39,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:40:39,613 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:40:39,619 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:40:39,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:40:39,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:40:39,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:40:39,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:40:39,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:40:39,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:40:39,630 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:40:39,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:40:39,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:40:39,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:40:39,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:40:39,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:40:39,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:40:39,637 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 14:40:39,683 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:40:39,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:40:39,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:40:39,687 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:40:39,687 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:40:39,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:40:39,687 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:40:39,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:40:39,688 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:40:39,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:40:39,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:40:39,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:40:39,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:40:39,690 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:40:39,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:40:39,690 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:40:39,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:40:39,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:40:39,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:40:39,691 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:40:39,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:40:39,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:40:39,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:40:39,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:40:39,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:40:39,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:40:39,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:40:39,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:40:39,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:40:39,693 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=0.5;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=0.5;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=0.5;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=0.5;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=0.5;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=0.5;log-additional-information=true; [2020-09-25 14:40:40,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:40:40,201 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:40:40,205 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:40:40,207 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:40:40,208 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:40:40,209 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label51.c [2020-09-25 14:40:40,306 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8cbbf9571/3f36077922584e80a584abffb4175c8a/FLAG9f7c2d7c6 [2020-09-25 14:40:40,917 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:40:40,922 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label51.c [2020-09-25 14:40:40,935 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8cbbf9571/3f36077922584e80a584abffb4175c8a/FLAG9f7c2d7c6 [2020-09-25 14:40:41,177 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8cbbf9571/3f36077922584e80a584abffb4175c8a [2020-09-25 14:40:41,190 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:40:41,199 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:40:41,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:40:41,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:40:41,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:40:41,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:40:41" (1/1) ... [2020-09-25 14:40:41,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3666d953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:40:41, skipping insertion in model container [2020-09-25 14:40:41,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:40:41" (1/1) ... [2020-09-25 14:40:41,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:40:41,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:40:41,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:40:41,748 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:40:42,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:40:42,081 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:40:42,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:40:42 WrapperNode [2020-09-25 14:40:42,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:40:42,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:40:42,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:40:42,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:40:42,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:40:42" (1/1) ... [2020-09-25 14:40:42,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:40:42" (1/1) ... [2020-09-25 14:40:42,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:40:42" (1/1) ... [2020-09-25 14:40:42,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:40:42" (1/1) ... [2020-09-25 14:40:42,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:40:42" (1/1) ... [2020-09-25 14:40:42,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:40:42" (1/1) ... [2020-09-25 14:40:42,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:40:42" (1/1) ... [2020-09-25 14:40:42,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:40:42,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:40:42,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:40:42,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:40:42,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:40:42" (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 14:40:42,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:40:42,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:40:42,323 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 14:40:42,323 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:40:42,323 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 14:40:42,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:40:42,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 14:40:42,324 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 14:40:42,324 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:40:42,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:40:42,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:40:43,921 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:40:43,921 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 14:40:43,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:40:43 BoogieIcfgContainer [2020-09-25 14:40:43,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:40:43,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:40:43,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:40:43,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:40:43,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:40:41" (1/3) ... [2020-09-25 14:40:43,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1a6de4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:40:43, skipping insertion in model container [2020-09-25 14:40:43,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:40:42" (2/3) ... [2020-09-25 14:40:43,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1a6de4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:40:43, skipping insertion in model container [2020-09-25 14:40:43,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:40:43" (3/3) ... [2020-09-25 14:40:43,941 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label51.c [2020-09-25 14:40:43,953 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:40:43,965 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:40:43,989 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:40:44,027 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:40:44,027 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:40:44,027 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:40:44,027 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:40:44,028 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:40:44,028 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:40:44,028 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:40:44,028 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:40:44,066 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 14:40:44,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-25 14:40:44,095 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:40:44,099 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] [2020-09-25 14:40:44,100 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:40:44,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:40:44,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1376443753, now seen corresponding path program 1 times [2020-09-25 14:40:44,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:40:44,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606475125] [2020-09-25 14:40:44,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:40:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:40:44,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:44,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:45,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:46,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:47,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:49,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:40:49,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-09-25 14:40:49,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 14:40:49,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-25 14:40:49,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:40:49,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:40:49,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:40:49,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 14:40:49,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-09-25 14:40:49,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 14:40:49,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:40:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:40:49,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:49,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:40:49,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:40:49,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:40:49,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 14:40:49,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:40:49,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:40:49,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:40:49,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:40:49,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 14:40:49,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:40:49,730 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 14:40:49,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606475125] [2020-09-25 14:40:49,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:40:49,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 14:40:49,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634131038] [2020-09-25 14:40:49,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 14:40:49,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:40:49,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 14:40:49,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 14:40:49,762 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 14:40:52,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:40:52,068 INFO L93 Difference]: Finished difference Result 1387 states and 1841 transitions. [2020-09-25 14:40:52,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 14:40:52,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2020-09-25 14:40:52,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:40:52,098 INFO L225 Difference]: With dead ends: 1387 [2020-09-25 14:40:52,098 INFO L226 Difference]: Without dead ends: 779 [2020-09-25 14:40:52,109 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 14:40:52,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2020-09-25 14:40:52,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 659. [2020-09-25 14:40:52,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 659 states. [2020-09-25 14:40:52,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 807 transitions. [2020-09-25 14:40:52,221 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 807 transitions. Word has length 136 [2020-09-25 14:40:52,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:40:52,222 INFO L479 AbstractCegarLoop]: Abstraction has 659 states and 807 transitions. [2020-09-25 14:40:52,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 14:40:52,223 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 807 transitions. [2020-09-25 14:40:52,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-09-25 14:40:52,256 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:40:52,257 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 14:40:52,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:40:52,257 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:40:52,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:40:52,258 INFO L82 PathProgramCache]: Analyzing trace with hash 685540285, now seen corresponding path program 1 times [2020-09-25 14:40:52,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:40:52,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602809101] [2020-09-25 14:40:52,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:40:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:40:52,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:52,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:52,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:53,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:53,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:54,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:54,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:56,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:57,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:40:57,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-09-25 14:40:57,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 14:40:57,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 14:40:57,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:40:57,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:40:57,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:40:57,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 14:40:57,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-09-25 14:40:57,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:40:57,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:40:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:40:57,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:57,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:40:57,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:40:57,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:40:57,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 14:40:57,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:40:57,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:40:57,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:40:57,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:40:57,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:40:57,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:40:57,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:40:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:40:57,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:57,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:40:57,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 14:40:57,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:40:57,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 14:40:57,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:40:57,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:40:57,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:40:57,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:40:57,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 14:40:57,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:40:57,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:40:57,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602809101] [2020-09-25 14:40:57,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:40:57,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 14:40:57,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697934171] [2020-09-25 14:40:57,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:40:57,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:40:57,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:40:57,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:40:57,615 INFO L87 Difference]: Start difference. First operand 659 states and 807 transitions. Second operand 5 states. [2020-09-25 14:40:59,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:40:59,694 INFO L93 Difference]: Finished difference Result 1648 states and 2113 transitions. [2020-09-25 14:40:59,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:40:59,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2020-09-25 14:40:59,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:40:59,702 INFO L225 Difference]: With dead ends: 1648 [2020-09-25 14:40:59,702 INFO L226 Difference]: Without dead ends: 1011 [2020-09-25 14:40:59,706 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 14:40:59,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2020-09-25 14:40:59,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 965. [2020-09-25 14:40:59,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 965 states. [2020-09-25 14:40:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1175 transitions. [2020-09-25 14:40:59,754 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1175 transitions. Word has length 154 [2020-09-25 14:40:59,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:40:59,755 INFO L479 AbstractCegarLoop]: Abstraction has 965 states and 1175 transitions. [2020-09-25 14:40:59,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:40:59,755 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1175 transitions. [2020-09-25 14:40:59,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-09-25 14:40:59,761 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:40:59,761 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 14:40:59,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:40:59,761 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:40:59,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:40:59,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1224055138, now seen corresponding path program 1 times [2020-09-25 14:40:59,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:40:59,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542492385] [2020-09-25 14:40:59,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:40:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:40:59,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:59,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:00,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:00,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:00,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:03,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:04,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:04,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:04,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:41:04,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-09-25 14:41:04,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 14:41:04,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 14:41:04,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:41:04,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:41:04,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 14:41:04,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-25 14:41:04,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-25 14:41:04,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:41:05,345 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-09-25 14:41:05,488 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2020-09-25 14:41:05,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:41:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:41:05,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:05,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:41:05,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:41:05,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:41:05,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 14:41:05,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:41:05,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:41:05,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:41:05,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:41:05,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:41:05,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:41:05,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:41:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:41:05,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:05,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:41:05,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 14:41:05,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:41:05,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-25 14:41:05,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:41:05,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:41:05,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:41:05,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:41:05,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 14:41:05,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:41:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:41:06,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542492385] [2020-09-25 14:41:06,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:41:06,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 14:41:06,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213593017] [2020-09-25 14:41:06,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 14:41:06,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:41:06,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 14:41:06,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-25 14:41:06,171 INFO L87 Difference]: Start difference. First operand 965 states and 1175 transitions. Second operand 13 states. [2020-09-25 14:41:06,893 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-09-25 14:41:07,565 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-09-25 14:41:08,114 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-09-25 14:41:08,704 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-09-25 14:41:09,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:41:09,380 INFO L93 Difference]: Finished difference Result 1996 states and 2510 transitions. [2020-09-25 14:41:09,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 14:41:09,385 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 155 [2020-09-25 14:41:09,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:41:09,395 INFO L225 Difference]: With dead ends: 1996 [2020-09-25 14:41:09,396 INFO L226 Difference]: Without dead ends: 1053 [2020-09-25 14:41:09,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-25 14:41:09,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2020-09-25 14:41:09,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1024. [2020-09-25 14:41:09,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2020-09-25 14:41:09,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1242 transitions. [2020-09-25 14:41:09,446 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1242 transitions. Word has length 155 [2020-09-25 14:41:09,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:41:09,446 INFO L479 AbstractCegarLoop]: Abstraction has 1024 states and 1242 transitions. [2020-09-25 14:41:09,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 14:41:09,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1242 transitions. [2020-09-25 14:41:09,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-09-25 14:41:09,452 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:41:09,453 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] [2020-09-25 14:41:09,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 14:41:09,453 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:41:09,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:41:09,454 INFO L82 PathProgramCache]: Analyzing trace with hash 82692427, now seen corresponding path program 1 times [2020-09-25 14:41:09,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:41:09,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678970404] [2020-09-25 14:41:09,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:41:09,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:41:09,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:09,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:09,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:09,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:10,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:11,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:12,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:12,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:14,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:41:14,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-09-25 14:41:14,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 14:41:14,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 14:41:14,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:41:14,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:41:14,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:41:14,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-25 14:41:14,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-09-25 14:41:14,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:41:14,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:41:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:41:14,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:14,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:41:14,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:41:14,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:41:14,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 14:41:14,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:41:14,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:41:14,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:41:14,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:41:14,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:41:14,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:41:14,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:41:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:41:14,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:14,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:41:14,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 14:41:14,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:41:14,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 14:41:14,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:41:14,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:41:14,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:41:14,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:41:14,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:41:14,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:41:14,698 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 14:41:14,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678970404] [2020-09-25 14:41:14,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:41:14,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 14:41:14,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70416653] [2020-09-25 14:41:14,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:41:14,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:41:14,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:41:14,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:41:14,702 INFO L87 Difference]: Start difference. First operand 1024 states and 1242 transitions. Second operand 5 states. [2020-09-25 14:41:16,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:41:16,834 INFO L93 Difference]: Finished difference Result 2646 states and 3360 transitions. [2020-09-25 14:41:16,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:41:16,835 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2020-09-25 14:41:16,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:41:16,846 INFO L225 Difference]: With dead ends: 2646 [2020-09-25 14:41:16,846 INFO L226 Difference]: Without dead ends: 1644 [2020-09-25 14:41:16,850 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 14:41:16,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2020-09-25 14:41:16,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1624. [2020-09-25 14:41:16,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1624 states. [2020-09-25 14:41:16,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2027 transitions. [2020-09-25 14:41:16,910 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2027 transitions. Word has length 158 [2020-09-25 14:41:16,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:41:16,911 INFO L479 AbstractCegarLoop]: Abstraction has 1624 states and 2027 transitions. [2020-09-25 14:41:16,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:41:16,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2027 transitions. [2020-09-25 14:41:16,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-09-25 14:41:16,920 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:41:16,920 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:16,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 14:41:16,921 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:41:16,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:41:16,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1073662819, now seen corresponding path program 1 times [2020-09-25 14:41:16,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:41:16,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802599524] [2020-09-25 14:41:16,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:41:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:41:16,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:17,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:17,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:17,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:18,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:18,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:19,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:20,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:21,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:41:21,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-09-25 14:41:21,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 14:41:21,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 14:41:21,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:41:21,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:41:21,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:41:21,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-09-25 14:41:21,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-25 14:41:21,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:41:22,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:41:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:41:22,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:22,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:41:22,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:41:22,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:41:22,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 14:41:22,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:41:22,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:41:22,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:41:22,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:41:22,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:41:22,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:41:22,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:41:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:41:22,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:22,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:41:22,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 14:41:22,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:41:22,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-25 14:41:22,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:41:22,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:41:22,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:41:22,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:41:22,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 14:41:22,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:41:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:41:22,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802599524] [2020-09-25 14:41:22,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:41:22,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 14:41:22,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530541737] [2020-09-25 14:41:22,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:41:22,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:41:22,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:41:22,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:41:22,257 INFO L87 Difference]: Start difference. First operand 1624 states and 2027 transitions. Second operand 5 states. [2020-09-25 14:41:24,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:41:24,231 INFO L93 Difference]: Finished difference Result 3865 states and 5049 transitions. [2020-09-25 14:41:24,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:41:24,232 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 171 [2020-09-25 14:41:24,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:41:24,247 INFO L225 Difference]: With dead ends: 3865 [2020-09-25 14:41:24,247 INFO L226 Difference]: Without dead ends: 2263 [2020-09-25 14:41:24,255 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 14:41:24,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2020-09-25 14:41:24,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2233. [2020-09-25 14:41:24,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2233 states. [2020-09-25 14:41:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 2776 transitions. [2020-09-25 14:41:24,342 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 2776 transitions. Word has length 171 [2020-09-25 14:41:24,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:41:24,342 INFO L479 AbstractCegarLoop]: Abstraction has 2233 states and 2776 transitions. [2020-09-25 14:41:24,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:41:24,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 2776 transitions. [2020-09-25 14:41:24,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-09-25 14:41:24,352 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:41:24,352 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:24,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 14:41:24,353 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:41:24,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:41:24,353 INFO L82 PathProgramCache]: Analyzing trace with hash 880526513, now seen corresponding path program 1 times [2020-09-25 14:41:24,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:41:24,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148142022] [2020-09-25 14:41:24,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:41:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:41:24,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:24,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:24,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:24,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:25,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:25,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:25,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:41:26,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking...