/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:39:18,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:39:18,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:39:18,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:39:18,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:39:18,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:39:18,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:39:18,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:39:18,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:39:18,540 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:39:18,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:39:18,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:39:18,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:39:18,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:39:18,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:39:18,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:39:18,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:39:18,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:39:18,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:39:18,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:39:18,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:39:18,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:39:18,575 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:39:18,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:39:18,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:39:18,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:39:18,591 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:39:18,593 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:39:18,593 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:39:18,595 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:39:18,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:39:18,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:39:18,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:39:18,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:39:18,602 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:39:18,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:39:18,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:39:18,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:39:18,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:39:18,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:39:18,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:39:18,608 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:39:18,653 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:39:18,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:39:18,656 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:39:18,657 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:39:18,657 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:39:18,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:39:18,658 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:39:18,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:39:18,659 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:39:18,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:39:18,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:39:18,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:39:18,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:39:18,661 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:39:18,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:39:18,661 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:39:18,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:39:18,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:39:18,662 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:39:18,664 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:39:18,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:39:18,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:39:18,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:39:18,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:39:18,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:39:18,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:39:18,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:39:18,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:39:18,669 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:39:18,669 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:39:19,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:39:19,169 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:39:19,174 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:39:19,177 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:39:19,178 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:39:19,179 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label22.c [2020-09-24 21:39:19,270 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f88d99b05/96f629ab8fbd442bbe3d9eff3a302d74/FLAG2893bfb32 [2020-09-24 21:39:19,919 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:39:19,920 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label22.c [2020-09-24 21:39:19,939 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f88d99b05/96f629ab8fbd442bbe3d9eff3a302d74/FLAG2893bfb32 [2020-09-24 21:39:20,159 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f88d99b05/96f629ab8fbd442bbe3d9eff3a302d74 [2020-09-24 21:39:20,173 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:39:20,180 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:39:20,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:39:20,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:39:20,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:39:20,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:39:20" (1/1) ... [2020-09-24 21:39:20,191 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 24.09 09:39:20, skipping insertion in model container [2020-09-24 21:39:20,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:39:20" (1/1) ... [2020-09-24 21:39:20,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:39:20,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:39:20,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:39:20,740 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:39:21,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:39:21,026 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:39:21,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:21 WrapperNode [2020-09-24 21:39:21,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:39:21,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:39:21,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:39:21,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:39:21,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:21" (1/1) ... [2020-09-24 21:39:21,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:21" (1/1) ... [2020-09-24 21:39:21,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:21" (1/1) ... [2020-09-24 21:39:21,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:21" (1/1) ... [2020-09-24 21:39:21,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:21" (1/1) ... [2020-09-24 21:39:21,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:21" (1/1) ... [2020-09-24 21:39:21,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:21" (1/1) ... [2020-09-24 21:39:21,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:39:21,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:39:21,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:39:21,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:39:21,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:39:21,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:39:21,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:39:21,227 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:39:21,227 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:39:21,227 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:39:21,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:39:21,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:39:21,228 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:39:21,228 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:39:21,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:39:21,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:39:22,748 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:39:22,749 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:39:22,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:39:22 BoogieIcfgContainer [2020-09-24 21:39:22,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:39:22,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:39:22,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:39:22,764 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:39:22,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:39:20" (1/3) ... [2020-09-24 21:39:22,766 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 24.09 09:39:22, skipping insertion in model container [2020-09-24 21:39:22,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:21" (2/3) ... [2020-09-24 21:39:22,767 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 24.09 09:39:22, skipping insertion in model container [2020-09-24 21:39:22,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:39:22" (3/3) ... [2020-09-24 21:39:22,769 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label22.c [2020-09-24 21:39:22,783 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:39:22,795 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:39:22,820 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:39:22,858 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:39:22,858 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:39:22,859 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:39:22,859 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:39:22,859 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:39:22,859 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:39:22,859 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:39:22,859 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:39:22,894 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 21:39:22,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-09-24 21:39:22,922 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:22,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:39:22,926 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:22,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:22,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1844135333, now seen corresponding path program 1 times [2020-09-24 21:39:22,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:22,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036488076] [2020-09-24 21:39:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:23,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:23,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:23,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:24,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:24,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:25,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:25,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:26,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:26,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:27,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:28,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:28,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-09-24 21:39:28,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:39:28,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-09-24 21:39:28,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:28,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:39:28,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:39:28,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 21:39:28,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 21:39:29,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:29,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:29,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:29,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:29,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:29,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-09-24 21:39:29,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:29,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:39:29,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:29,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:39:29,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:39:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:39:29,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036488076] [2020-09-24 21:39:29,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:39:29,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-24 21:39:29,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524129059] [2020-09-24 21:39:29,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:39:29,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:29,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:39:29,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:39:29,715 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 18 states. [2020-09-24 21:39:30,575 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-09-24 21:39:30,822 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-09-24 21:39:31,344 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-09-24 21:39:32,298 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-09-24 21:39:32,794 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-09-24 21:39:36,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:39:36,872 INFO L93 Difference]: Finished difference Result 1700 states and 2421 transitions. [2020-09-24 21:39:36,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 21:39:36,874 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 155 [2020-09-24 21:39:36,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:39:36,904 INFO L225 Difference]: With dead ends: 1700 [2020-09-24 21:39:36,904 INFO L226 Difference]: Without dead ends: 1101 [2020-09-24 21:39:36,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=303, Invalid=627, Unknown=0, NotChecked=0, Total=930 [2020-09-24 21:39:36,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-09-24 21:39:37,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 985. [2020-09-24 21:39:37,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-09-24 21:39:37,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1147 transitions. [2020-09-24 21:39:37,052 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1147 transitions. Word has length 155 [2020-09-24 21:39:37,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:39:37,053 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 1147 transitions. [2020-09-24 21:39:37,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:39:37,054 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1147 transitions. [2020-09-24 21:39:37,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-09-24 21:39:37,072 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:37,072 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:39:37,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:39:37,073 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:37,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:37,074 INFO L82 PathProgramCache]: Analyzing trace with hash 46432410, now seen corresponding path program 1 times [2020-09-24 21:39:37,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:37,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978567399] [2020-09-24 21:39:37,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:37,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:37,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:37,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:40,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:41,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:41,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:42,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:42,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 206 [2020-09-24 21:39:42,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:39:42,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-24 21:39:42,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:42,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 21:39:42,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:39:42,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-24 21:39:42,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:39:42,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:42,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:42,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:42,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:42,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:42,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-24 21:39:42,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:42,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:39:42,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:42,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:39:42,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 21:39:42,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:39:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:42,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:43,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:43,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:39:43,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:43,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-24 21:39:43,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:43,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:39:43,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:43,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:39:43,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:43,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 21:39:43,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:43,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:43,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:43,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:43,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:39:43,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:39:43,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-09-24 21:39:43,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:43,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:39:43,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:43,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:39:43,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:39:43,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978567399] [2020-09-24 21:39:43,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:39:43,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 21:39:43,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117139188] [2020-09-24 21:39:43,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 21:39:43,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:43,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 21:39:43,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:39:43,873 INFO L87 Difference]: Start difference. First operand 985 states and 1147 transitions. Second operand 23 states. [2020-09-24 21:39:44,395 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2020-09-24 21:39:45,537 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2020-09-24 21:39:47,798 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2020-09-24 21:39:48,099 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 83 [2020-09-24 21:39:48,756 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2020-09-24 21:39:49,080 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 81 [2020-09-24 21:39:49,353 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 79 [2020-09-24 21:39:49,689 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 79 [2020-09-24 21:39:49,933 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-09-24 21:39:50,265 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 90 [2020-09-24 21:39:51,058 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 89 [2020-09-24 21:39:51,997 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2020-09-24 21:39:52,365 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 88 [2020-09-24 21:39:52,610 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 77 [2020-09-24 21:39:53,296 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 87 [2020-09-24 21:39:53,491 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2020-09-24 21:39:53,801 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2020-09-24 21:39:54,136 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2020-09-24 21:39:55,066 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2020-09-24 21:39:55,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:39:55,992 INFO L93 Difference]: Finished difference Result 3603 states and 4566 transitions. [2020-09-24 21:39:55,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-24 21:39:55,992 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 193 [2020-09-24 21:39:55,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:39:56,008 INFO L225 Difference]: With dead ends: 3603 [2020-09-24 21:39:56,008 INFO L226 Difference]: Without dead ends: 2706 [2020-09-24 21:39:56,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=942, Invalid=2480, Unknown=0, NotChecked=0, Total=3422 [2020-09-24 21:39:56,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2706 states. [2020-09-24 21:39:56,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2706 to 2012. [2020-09-24 21:39:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2012 states. [2020-09-24 21:39:56,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 2366 transitions. [2020-09-24 21:39:56,096 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 2366 transitions. Word has length 193 [2020-09-24 21:39:56,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:39:56,097 INFO L479 AbstractCegarLoop]: Abstraction has 2012 states and 2366 transitions. [2020-09-24 21:39:56,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 21:39:56,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 2366 transitions. [2020-09-24 21:39:56,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-09-24 21:39:56,106 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:56,106 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:39:56,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:39:56,107 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:56,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:56,107 INFO L82 PathProgramCache]: Analyzing trace with hash -2123217844, now seen corresponding path program 1 times [2020-09-24 21:39:56,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:56,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314804008] [2020-09-24 21:39:56,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:56,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:56,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:56,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:56,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:58,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:58,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:00,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:00,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:00,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:01,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:01,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-09-24 21:40:01,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:40:01,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-09-24 21:40:01,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:01,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 21:40:01,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:40:01,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-09-24 21:40:01,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 19 [2020-09-24 21:40:01,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:01,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:01,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:01,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:01,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:01,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-24 21:40:01,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:40:01,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:01,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:40:01,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 21:40:01,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:40:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:01,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:01,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:01,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:01,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:40:01,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:40:01,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-09-24 21:40:01,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:01,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:40:01,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:01,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:40:01,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:40:02,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 21:40:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:02,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:02,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:02,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:02,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:40:02,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:40:02,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-09-24 21:40:02,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:02,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:40:02,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:02,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:40:02,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:40:02,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314804008] [2020-09-24 21:40:02,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:40:02,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 21:40:02,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351290362] [2020-09-24 21:40:02,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 21:40:02,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:02,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 21:40:02,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:40:02,939 INFO L87 Difference]: Start difference. First operand 2012 states and 2366 transitions. Second operand 15 states. [2020-09-24 21:40:04,031 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-09-24 21:40:04,934 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-09-24 21:40:05,196 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-09-24 21:40:06,876 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-09-24 21:40:07,443 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67