/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=0.2 --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_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:14:56,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:14:56,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:14:56,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:14:56,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:14:56,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:14:56,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:14:56,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:14:56,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:14:56,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:14:56,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:14:56,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:14:56,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:14:56,656 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:14:56,657 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:14:56,658 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:14:56,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:14:56,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:14:56,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:14:56,664 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:14:56,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:14:56,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:14:56,672 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:14:56,673 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:14:56,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:14:56,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:14:56,676 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:14:56,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:14:56,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:14:56,682 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:14:56,683 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:14:56,684 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:14:56,684 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:14:56,685 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:14:56,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:14:56,688 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:14:56,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:14:56,689 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:14:56,689 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:14:56,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:14:56,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:14:56,693 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 11:14:56,749 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:14:56,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:14:56,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:14:56,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:14:56,752 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:14:56,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:14:56,752 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:14:56,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:14:56,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:14:56,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:14:56,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:14:56,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:14:56,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:14:56,754 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:14:56,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:14:56,754 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:14:56,755 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:14:56,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:14:56,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:14:56,755 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:14:56,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:14:56,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:14:56,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:14:56,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:14:56,757 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:14:56,758 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:14:56,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:14:56,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:14:56,758 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:14:56,758 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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;log-additional-information=true; [2020-09-25 11:14:57,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:14:57,253 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:14:57,257 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:14:57,259 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:14:57,259 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:14:57,260 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label56.c [2020-09-25 11:14:57,342 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/63685af5d/03c7a084686243de98cc0e914384c896/FLAGa4174da2b [2020-09-25 11:14:58,001 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:14:58,002 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label56.c [2020-09-25 11:14:58,015 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/63685af5d/03c7a084686243de98cc0e914384c896/FLAGa4174da2b [2020-09-25 11:14:58,224 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/63685af5d/03c7a084686243de98cc0e914384c896 [2020-09-25 11:14:58,239 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:14:58,246 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:14:58,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:14:58,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:14:58,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:14:58,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:14:58" (1/1) ... [2020-09-25 11:14:58,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d72532b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:58, skipping insertion in model container [2020-09-25 11:14:58,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:14:58" (1/1) ... [2020-09-25 11:14:58,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:14:58,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:14:58,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:14:58,862 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:14:59,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:14:59,154 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:14:59,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:59 WrapperNode [2020-09-25 11:14:59,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:14:59,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:14:59,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:14:59,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:14:59,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:59" (1/1) ... [2020-09-25 11:14:59,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:59" (1/1) ... [2020-09-25 11:14:59,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:59" (1/1) ... [2020-09-25 11:14:59,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:59" (1/1) ... [2020-09-25 11:14:59,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:59" (1/1) ... [2020-09-25 11:14:59,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:59" (1/1) ... [2020-09-25 11:14:59,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:59" (1/1) ... [2020-09-25 11:14:59,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:14:59,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:14:59,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:14:59,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:14:59,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:59" (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 11:14:59,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:14:59,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:14:59,364 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 11:14:59,364 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:14:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 11:14:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:14:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:14:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 11:14:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:14:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:14:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:15:00,920 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:15:00,920 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 11:15:00,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:15:00 BoogieIcfgContainer [2020-09-25 11:15:00,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:15:00,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:15:00,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:15:00,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:15:00,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:14:58" (1/3) ... [2020-09-25 11:15:00,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33478af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:15:00, skipping insertion in model container [2020-09-25 11:15:00,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:59" (2/3) ... [2020-09-25 11:15:00,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33478af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:15:00, skipping insertion in model container [2020-09-25 11:15:00,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:15:00" (3/3) ... [2020-09-25 11:15:00,950 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label56.c [2020-09-25 11:15:00,962 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:15:00,975 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:15:01,000 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:15:01,042 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:15:01,043 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:15:01,043 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:15:01,044 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:15:01,044 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:15:01,044 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:15:01,044 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:15:01,044 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:15:01,087 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 11:15:01,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-25 11:15:01,113 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:15:01,115 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] [2020-09-25 11:15:01,115 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:15:01,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:15:01,123 INFO L82 PathProgramCache]: Analyzing trace with hash 602782831, now seen corresponding path program 1 times [2020-09-25 11:15:01,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:15:01,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036488076] [2020-09-25 11:15:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:15:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:01,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:01,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:02,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:04,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:04,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:04,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:06,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:06,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:06,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-09-25 11:15:06,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:15:06,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-09-25 11:15:06,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:06,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:06,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:15:06,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 11:15:06,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-09-25 11:15:06,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 11:15:06,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:15:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:06,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:06,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:06,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:15:06,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:06,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-25 11:15:06,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:06,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:06,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:15:06,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:15:06,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 11:15:06,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:06,706 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 11:15:06,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036488076] [2020-09-25 11:15:06,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:15:06,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:15:06,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506120553] [2020-09-25 11:15:06,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:15:06,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:15:06,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:15:06,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:15:06,738 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 11:15:09,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:15:09,040 INFO L93 Difference]: Finished difference Result 1212 states and 1611 transitions. [2020-09-25 11:15:09,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:15:09,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 104 [2020-09-25 11:15:09,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:15:09,078 INFO L225 Difference]: With dead ends: 1212 [2020-09-25 11:15:09,079 INFO L226 Difference]: Without dead ends: 638 [2020-09-25 11:15:09,089 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 11:15:09,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-09-25 11:15:09,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 603. [2020-09-25 11:15:09,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-09-25 11:15:09,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 719 transitions. [2020-09-25 11:15:09,196 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 719 transitions. Word has length 104 [2020-09-25 11:15:09,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:15:09,197 INFO L479 AbstractCegarLoop]: Abstraction has 603 states and 719 transitions. [2020-09-25 11:15:09,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:15:09,197 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 719 transitions. [2020-09-25 11:15:09,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-09-25 11:15:09,206 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:15:09,206 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] [2020-09-25 11:15:09,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:15:09,207 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:15:09,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:15:09,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1195739072, now seen corresponding path program 1 times [2020-09-25 11:15:09,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:15:09,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140743983] [2020-09-25 11:15:09,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:15:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:09,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:09,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:09,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:09,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:10,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:10,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:10,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:12,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:12,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-09-25 11:15:12,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:15:12,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2770 [2020-09-25 11:15:12,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:12,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:12,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:15:12,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 11:15:12,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-09-25 11:15:12,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:12,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:15:12,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:12,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:12,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:12,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:15:12,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:12,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-25 11:15:12,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:12,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:12,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:15:12,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:15:12,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 11:15:12,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-25 11:15:12,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:15:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:12,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:12,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:12,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:12,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 11:15:12,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:15:12,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-25 11:15:12,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:12,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:12,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:15:12,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:15:12,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 11:15:12,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-25 11:15:12,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140743983] [2020-09-25 11:15:12,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:15:12,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 11:15:12,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914536624] [2020-09-25 11:15:12,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 11:15:12,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:15:12,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 11:15:12,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:15:12,391 INFO L87 Difference]: Start difference. First operand 603 states and 719 transitions. Second operand 6 states. [2020-09-25 11:15:14,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:15:14,476 INFO L93 Difference]: Finished difference Result 1563 states and 1937 transitions. [2020-09-25 11:15:14,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 11:15:14,481 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2020-09-25 11:15:14,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:15:14,489 INFO L225 Difference]: With dead ends: 1563 [2020-09-25 11:15:14,490 INFO L226 Difference]: Without dead ends: 984 [2020-09-25 11:15:14,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:15:14,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2020-09-25 11:15:14,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 891. [2020-09-25 11:15:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 891 states. [2020-09-25 11:15:14,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1097 transitions. [2020-09-25 11:15:14,549 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1097 transitions. Word has length 125 [2020-09-25 11:15:14,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:15:14,550 INFO L479 AbstractCegarLoop]: Abstraction has 891 states and 1097 transitions. [2020-09-25 11:15:14,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 11:15:14,551 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1097 transitions. [2020-09-25 11:15:14,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-09-25 11:15:14,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:15:14,557 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] [2020-09-25 11:15:14,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:15:14,557 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:15:14,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:15:14,558 INFO L82 PathProgramCache]: Analyzing trace with hash 305762680, now seen corresponding path program 1 times [2020-09-25 11:15:14,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:15:14,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825911450] [2020-09-25 11:15:14,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:15:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:14,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:14,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:14,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:15,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:15,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:15,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:15,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:15,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:19,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:19,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-09-25 11:15:19,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 11:15:19,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-09-25 11:15:19,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:19,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:19,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:15:19,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-09-25 11:15:19,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-25 11:15:19,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:19,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:15:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:19,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:19,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:19,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:15:19,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:19,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 11:15:19,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:19,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:19,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:15:19,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:15:19,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:15:19,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:19,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:15:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:19,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:19,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:19,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 11:15:19,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:19,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-25 11:15:19,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:19,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:19,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:15:19,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:15:19,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 11:15:19,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:15:19,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825911450] [2020-09-25 11:15:19,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:15:19,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:15:19,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741651940] [2020-09-25 11:15:19,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:15:19,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:15:19,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:15:19,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:15:19,879 INFO L87 Difference]: Start difference. First operand 891 states and 1097 transitions. Second operand 5 states. [2020-09-25 11:15:21,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:15:21,798 INFO L93 Difference]: Finished difference Result 2378 states and 3036 transitions. [2020-09-25 11:15:21,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:15:21,798 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2020-09-25 11:15:21,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:15:21,810 INFO L225 Difference]: With dead ends: 2378 [2020-09-25 11:15:21,810 INFO L226 Difference]: Without dead ends: 1511 [2020-09-25 11:15:21,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 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 11:15:21,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2020-09-25 11:15:21,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1465. [2020-09-25 11:15:21,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1465 states. [2020-09-25 11:15:21,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 1828 transitions. [2020-09-25 11:15:21,870 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 1828 transitions. Word has length 134 [2020-09-25 11:15:21,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:15:21,871 INFO L479 AbstractCegarLoop]: Abstraction has 1465 states and 1828 transitions. [2020-09-25 11:15:21,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:15:21,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 1828 transitions. [2020-09-25 11:15:21,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-09-25 11:15:21,880 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:15:21,880 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-25 11:15:21,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:15:21,881 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:15:21,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:15:21,881 INFO L82 PathProgramCache]: Analyzing trace with hash -588171755, now seen corresponding path program 1 times [2020-09-25 11:15:21,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:15:21,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985419035] [2020-09-25 11:15:21,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:15:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:21,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:22,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:22,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:23,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:23,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-09-25 11:15:23,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:15:23,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1961 [2020-09-25 11:15:23,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:23,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:23,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:15:23,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 11:15:23,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-09-25 11:15:23,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:23,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:15:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:23,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:23,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:23,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:15:23,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:23,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 11:15:24,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:24,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:15:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:15:24,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 11:15:24,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:24,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:15:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:24,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:24,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:24,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:24,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 11:15:24,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:15:24,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-25 11:15:24,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:24,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:24,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:15:24,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:15:24,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 11:15:24,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:15:24,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 11:15:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:24,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:24,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:24,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 11:15:24,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:24,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-09-25 11:15:24,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:24,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:24,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:15:24,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:15:24,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 11:15:24,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 11:15:24,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985419035] [2020-09-25 11:15:24,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:15:24,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 11:15:24,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896064955] [2020-09-25 11:15:24,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 11:15:24,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:15:24,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 11:15:24,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:15:24,408 INFO L87 Difference]: Start difference. First operand 1465 states and 1828 transitions. Second operand 7 states. [2020-09-25 11:15:26,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:15:26,590 INFO L93 Difference]: Finished difference Result 3082 states and 3912 transitions. [2020-09-25 11:15:26,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 11:15:26,593 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 181 [2020-09-25 11:15:26,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:15:26,604 INFO L225 Difference]: With dead ends: 3082 [2020-09-25 11:15:26,604 INFO L226 Difference]: Without dead ends: 1782 [2020-09-25 11:15:26,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:15:26,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2020-09-25 11:15:26,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1477. [2020-09-25 11:15:26,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1477 states. [2020-09-25 11:15:26,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 1833 transitions. [2020-09-25 11:15:26,664 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 1833 transitions. Word has length 181 [2020-09-25 11:15:26,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:15:26,665 INFO L479 AbstractCegarLoop]: Abstraction has 1477 states and 1833 transitions. [2020-09-25 11:15:26,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 11:15:26,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 1833 transitions. [2020-09-25 11:15:26,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-09-25 11:15:26,673 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:15:26,673 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-25 11:15:26,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:15:26,674 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:15:26,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:15:26,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1707194346, now seen corresponding path program 1 times [2020-09-25 11:15:26,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:15:26,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091127825] [2020-09-25 11:15:26,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:15:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:26,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:27,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:27,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:27,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:27,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:27,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:27,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:31,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:31,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-09-25 11:15:31,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:15:31,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4866 [2020-09-25 11:15:31,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:31,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:31,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:15:31,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 11:15:31,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 11:15:31,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:31,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:15:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:31,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:31,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:31,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:15:31,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:31,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 11:15:31,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:31,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:31,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:15:31,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:15:31,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 11:15:31,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:31,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:15:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:31,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:31,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:31,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 11:15:31,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:31,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-25 11:15:31,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:31,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:31,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:15:31,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:15:31,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 11:15:31,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:31,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-25 11:15:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:31,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:31,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:31,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 11:15:31,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:31,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-25 11:15:31,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:31,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:31,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:15:31,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-09-25 11:15:31,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:15:31,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 60 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 11:15:32,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091127825] [2020-09-25 11:15:32,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:15:32,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 11:15:32,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37441457] [2020-09-25 11:15:32,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 11:15:32,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:15:32,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 11:15:32,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:15:32,041 INFO L87 Difference]: Start difference. First operand 1477 states and 1833 transitions. Second operand 7 states. [2020-09-25 11:15:34,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:15:34,236 INFO L93 Difference]: Finished difference Result 3850 states and 4918 transitions. [2020-09-25 11:15:34,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 11:15:34,236 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 188 [2020-09-25 11:15:34,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:15:34,250 INFO L225 Difference]: With dead ends: 3850 [2020-09-25 11:15:34,250 INFO L226 Difference]: Without dead ends: 2397 [2020-09-25 11:15:34,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:15:34,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2020-09-25 11:15:34,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 2214. [2020-09-25 11:15:34,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2214 states. [2020-09-25 11:15:34,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2214 states to 2214 states and 2780 transitions. [2020-09-25 11:15:34,348 INFO L78 Accepts]: Start accepts. Automaton has 2214 states and 2780 transitions. Word has length 188 [2020-09-25 11:15:34,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:15:34,348 INFO L479 AbstractCegarLoop]: Abstraction has 2214 states and 2780 transitions. [2020-09-25 11:15:34,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 11:15:34,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2214 states and 2780 transitions. [2020-09-25 11:15:34,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-09-25 11:15:34,360 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:15:34,360 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-25 11:15:34,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:15:34,361 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:15:34,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:15:34,361 INFO L82 PathProgramCache]: Analyzing trace with hash -907335323, now seen corresponding path program 1 times [2020-09-25 11:15:34,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:15:34,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371438913] [2020-09-25 11:15:34,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:15:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:34,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:34,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:34,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:34,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:35,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:35,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:39,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:39,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-09-25 11:15:39,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 11:15:39,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-09-25 11:15:39,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:39,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:39,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 11:15:39,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 11:15:39,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 11:15:39,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:39,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:15:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:39,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:39,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:39,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:15:39,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:39,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-25 11:15:39,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:39,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:39,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:15:39,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:15:39,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 11:15:39,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:15:39,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:15:39,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:39,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:39,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:39,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:39,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 11:15:39,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:15:39,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-25 11:15:39,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:39,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:39,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:15:39,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:15:39,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 11:15:39,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:39,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 11:15:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:39,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:39,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:39,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 11:15:39,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:39,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-25 11:15:39,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:39,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:39,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:15:39,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:15:39,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 11:15:39,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:15:39,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-25 11:15:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:39,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:39,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:39,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 11:15:39,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:39,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 11:15:39,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:39,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:39,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:15:39,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-09-25 11:15:39,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:15:39,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 89 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-09-25 11:15:39,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371438913] [2020-09-25 11:15:39,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:15:39,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 11:15:39,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479517778] [2020-09-25 11:15:39,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 11:15:39,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:15:39,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 11:15:39,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:15:39,922 INFO L87 Difference]: Start difference. First operand 2214 states and 2780 transitions. Second operand 9 states. [2020-09-25 11:15:41,068 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-09-25 11:15:43,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:15:43,288 INFO L93 Difference]: Finished difference Result 5129 states and 6427 transitions. [2020-09-25 11:15:43,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 11:15:43,289 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 209 [2020-09-25 11:15:43,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:15:43,305 INFO L225 Difference]: With dead ends: 5129 [2020-09-25 11:15:43,306 INFO L226 Difference]: Without dead ends: 2939 [2020-09-25 11:15:43,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-25 11:15:43,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2020-09-25 11:15:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 2572. [2020-09-25 11:15:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2572 states. [2020-09-25 11:15:43,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2572 states to 2572 states and 3184 transitions. [2020-09-25 11:15:43,402 INFO L78 Accepts]: Start accepts. Automaton has 2572 states and 3184 transitions. Word has length 209 [2020-09-25 11:15:43,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:15:43,403 INFO L479 AbstractCegarLoop]: Abstraction has 2572 states and 3184 transitions. [2020-09-25 11:15:43,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 11:15:43,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2572 states and 3184 transitions. [2020-09-25 11:15:43,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-09-25 11:15:43,415 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:15:43,415 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-25 11:15:43,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 11:15:43,416 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:15:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:15:43,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1958569916, now seen corresponding path program 1 times [2020-09-25 11:15:43,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:15:43,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885943962] [2020-09-25 11:15:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:15:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:43,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:43,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:43,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:46,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking...