/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/Problem11_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:46:22,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:46:22,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:46:22,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:46:22,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:46:22,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:46:22,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:46:22,604 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:46:22,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:46:22,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:46:22,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:46:22,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:46:22,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:46:22,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:46:22,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:46:22,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:46:22,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:46:22,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:46:22,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:46:22,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:46:22,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:46:22,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:46:22,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:46:22,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:46:22,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:46:22,629 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:46:22,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:46:22,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:46:22,630 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:46:22,631 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:46:22,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:46:22,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:46:22,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:46:22,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:46:22,635 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:46:22,635 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:46:22,636 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:46:22,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:46:22,636 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:46:22,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:46:22,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:46:22,639 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 21:46:22,663 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:46:22,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:46:22,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:46:22,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:46:22,665 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:46:22,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:46:22,665 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:46:22,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:46:22,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:46:22,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:46:22,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:46:22,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:46:22,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:46:22,667 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:46:22,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:46:22,667 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:46:22,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:46:22,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:46:22,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:46:22,668 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:46:22,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:46:22,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:46:22,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:46:22,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:46:22,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:46:22,669 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:46:22,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:46:22,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:46:22,670 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:46:22,670 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 21:46:23,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:46:23,202 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:46:23,206 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:46:23,209 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:46:23,211 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:46:23,212 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label18.c [2020-09-24 21:46:23,302 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93350b716/036aca35ed7b48d89d5417450b6a124b/FLAG56447de13 [2020-09-24 21:46:24,014 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:46:24,015 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem11_label18.c [2020-09-24 21:46:24,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93350b716/036aca35ed7b48d89d5417450b6a124b/FLAG56447de13 [2020-09-24 21:46:24,226 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93350b716/036aca35ed7b48d89d5417450b6a124b [2020-09-24 21:46:24,240 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:46:24,245 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:46:24,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:46:24,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:46:24,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:46:24,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:46:24" (1/1) ... [2020-09-24 21:46:24,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7730d90c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:24, skipping insertion in model container [2020-09-24 21:46:24,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:46:24" (1/1) ... [2020-09-24 21:46:24,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:46:24,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:46:25,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:46:25,065 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:46:25,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:46:25,343 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:46:25,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:25 WrapperNode [2020-09-24 21:46:25,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:46:25,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:46:25,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:46:25,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:46:25,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:25" (1/1) ... [2020-09-24 21:46:25,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:25" (1/1) ... [2020-09-24 21:46:25,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:25" (1/1) ... [2020-09-24 21:46:25,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:25" (1/1) ... [2020-09-24 21:46:25,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:25" (1/1) ... [2020-09-24 21:46:25,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:25" (1/1) ... [2020-09-24 21:46:25,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:25" (1/1) ... [2020-09-24 21:46:25,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:46:25,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:46:25,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:46:25,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:46:25,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:25" (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 21:46:25,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:46:25,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:46:25,653 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:46:25,653 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:46:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:46:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:46:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:46:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:46:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:46:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:46:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:46:28,282 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:46:28,282 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:46:28,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:46:28 BoogieIcfgContainer [2020-09-24 21:46:28,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:46:28,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:46:28,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:46:28,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:46:28,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:46:24" (1/3) ... [2020-09-24 21:46:28,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@756e3e01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:46:28, skipping insertion in model container [2020-09-24 21:46:28,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:25" (2/3) ... [2020-09-24 21:46:28,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@756e3e01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:46:28, skipping insertion in model container [2020-09-24 21:46:28,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:46:28" (3/3) ... [2020-09-24 21:46:28,304 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label18.c [2020-09-24 21:46:28,317 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:46:28,328 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:46:28,352 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:46:28,388 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:46:28,388 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:46:28,389 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:46:28,389 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:46:28,389 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:46:28,389 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:46:28,389 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:46:28,390 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:46:28,427 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states. [2020-09-24 21:46:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 21:46:28,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:46:28,438 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] [2020-09-24 21:46:28,439 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:46:28,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:46:28,448 INFO L82 PathProgramCache]: Analyzing trace with hash -123889732, now seen corresponding path program 1 times [2020-09-24 21:46:28,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:46:28,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834184249] [2020-09-24 21:46:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:46:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:28,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:28,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:29,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:30,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:30,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 21:46:30,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:46:30,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1349 [2020-09-24 21:46:30,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:30,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:46:30,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:46:30,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 21:46:30,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 33 [2020-09-24 21:46:30,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:46:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:30,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:30,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:30,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 21:46:30,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:30,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-24 21:46:30,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:30,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:46:30,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:46:30,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 21:46:30,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:46:30,270 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 21:46:30,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834184249] [2020-09-24 21:46:30,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:46:30,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 21:46:30,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033116339] [2020-09-24 21:46:30,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 21:46:30,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:46:30,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 21:46:30,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 21:46:30,309 INFO L87 Difference]: Start difference. First operand 813 states. Second operand 4 states. [2020-09-24 21:46:34,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:46:34,140 INFO L93 Difference]: Finished difference Result 1921 states and 2518 transitions. [2020-09-24 21:46:34,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 21:46:34,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-09-24 21:46:34,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:46:34,176 INFO L225 Difference]: With dead ends: 1921 [2020-09-24 21:46:34,177 INFO L226 Difference]: Without dead ends: 1036 [2020-09-24 21:46:34,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:46:34,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2020-09-24 21:46:34,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 978. [2020-09-24 21:46:34,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 978 states. [2020-09-24 21:46:34,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1165 transitions. [2020-09-24 21:46:34,317 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1165 transitions. Word has length 55 [2020-09-24 21:46:34,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:46:34,318 INFO L479 AbstractCegarLoop]: Abstraction has 978 states and 1165 transitions. [2020-09-24 21:46:34,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 21:46:34,319 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1165 transitions. [2020-09-24 21:46:34,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-09-24 21:46:34,327 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:46:34,327 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-24 21:46:34,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:46:34,328 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:46:34,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:46:34,328 INFO L82 PathProgramCache]: Analyzing trace with hash 497365935, now seen corresponding path program 1 times [2020-09-24 21:46:34,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:46:34,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400443603] [2020-09-24 21:46:34,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:46:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:34,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:34,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:36,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:37,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:37,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:38,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:39,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:39,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-09-24 21:46:39,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:46:39,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-24 21:46:39,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:39,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 21:46:39,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:46:39,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:46:39,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:46:39,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:46:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:39,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:39,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:39,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 21:46:39,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:39,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 21:46:39,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:39,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:46:39,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:46:39,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:46:39,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:46:39,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 21:46:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:39,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:40,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:40,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:40,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 21:46:40,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:46:40,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 447 [2020-09-24 21:46:40,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:40,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:46:40,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:46:40,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-24 21:46:40,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:46:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:46:40,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400443603] [2020-09-24 21:46:40,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:46:40,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:46:40,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675369106] [2020-09-24 21:46:40,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:46:40,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:46:40,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:46:40,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:46:40,655 INFO L87 Difference]: Start difference. First operand 978 states and 1165 transitions. Second operand 12 states. [2020-09-24 21:46:41,344 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2020-09-24 21:46:41,684 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-09-24 21:46:52,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:46:52,520 INFO L93 Difference]: Finished difference Result 2795 states and 3689 transitions. [2020-09-24 21:46:52,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 21:46:52,521 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 137 [2020-09-24 21:46:52,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:46:52,534 INFO L225 Difference]: With dead ends: 2795 [2020-09-24 21:46:52,534 INFO L226 Difference]: Without dead ends: 1803 [2020-09-24 21:46:52,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2020-09-24 21:46:52,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2020-09-24 21:46:52,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1388. [2020-09-24 21:46:52,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1388 states. [2020-09-24 21:46:52,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 1607 transitions. [2020-09-24 21:46:52,624 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 1607 transitions. Word has length 137 [2020-09-24 21:46:52,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:46:52,627 INFO L479 AbstractCegarLoop]: Abstraction has 1388 states and 1607 transitions. [2020-09-24 21:46:52,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:46:52,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 1607 transitions. [2020-09-24 21:46:52,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-24 21:46:52,641 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:46:52,641 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-24 21:46:52,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:46:52,642 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:46:52,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:46:52,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1536608329, now seen corresponding path program 1 times [2020-09-24 21:46:52,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:46:52,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442566673] [2020-09-24 21:46:52,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:46:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:52,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:52,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:52,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:53,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:54,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:54,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:57,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:57,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:57,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-09-24 21:46:57,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:46:57,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-24 21:46:57,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:57,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:46:57,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:46:57,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-09-24 21:46:57,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:46:57,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:46:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:57,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:57,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:57,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 21:46:57,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:57,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 21:46:57,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:57,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:46:57,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:46:57,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 21:46:57,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:46:57,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 21:46:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:57,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:58,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:58,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 21:46:58,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:58,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-09-24 21:46:58,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:58,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:46:58,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:46:58,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 21:46:58,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:46:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:46:58,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442566673] [2020-09-24 21:46:58,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:46:58,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 21:46:58,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007153121] [2020-09-24 21:46:58,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:46:58,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:46:58,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:46:58,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:46:58,338 INFO L87 Difference]: Start difference. First operand 1388 states and 1607 transitions. Second operand 8 states. [2020-09-24 21:47:02,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:47:02,810 INFO L93 Difference]: Finished difference Result 2606 states and 3038 transitions. [2020-09-24 21:47:02,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 21:47:02,811 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 139 [2020-09-24 21:47:02,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:47:02,820 INFO L225 Difference]: With dead ends: 2606 [2020-09-24 21:47:02,821 INFO L226 Difference]: Without dead ends: 1432 [2020-09-24 21:47:02,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:47:02,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2020-09-24 21:47:02,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1396. [2020-09-24 21:47:02,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1396 states. [2020-09-24 21:47:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 1613 transitions. [2020-09-24 21:47:02,870 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 1613 transitions. Word has length 139 [2020-09-24 21:47:02,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:47:02,871 INFO L479 AbstractCegarLoop]: Abstraction has 1396 states and 1613 transitions. [2020-09-24 21:47:02,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 21:47:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 1613 transitions. [2020-09-24 21:47:02,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-09-24 21:47:02,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:47:02,878 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-24 21:47:02,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:47:02,879 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:47:02,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:47:02,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1591885366, now seen corresponding path program 1 times [2020-09-24 21:47:02,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:47:02,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007022702] [2020-09-24 21:47:02,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:47:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:47:02,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:03,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:03,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:03,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:03,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:03,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:07,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:47:07,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-09-24 21:47:07,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:47:07,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-09-24 21:47:07,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:47:07,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:47:07,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:47:07,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 178 [2020-09-24 21:47:07,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:47:08,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:47:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:47:08,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:08,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:47:08,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 21:47:08,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:47:08,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-24 21:47:08,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:47:08,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:47:08,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:47:08,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:47:08,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:47:08,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 21:47:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:47:08,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:08,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:08,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:47:08,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-09-24 21:47:08,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:47:08,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 454 [2020-09-24 21:47:08,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:47:08,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:47:08,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:47:08,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-09-24 21:47:08,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:47:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:47:09,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007022702] [2020-09-24 21:47:09,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:47:09,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 21:47:09,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020592292] [2020-09-24 21:47:09,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 21:47:09,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:47:09,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 21:47:09,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:47:09,497 INFO L87 Difference]: Start difference. First operand 1396 states and 1613 transitions. Second operand 9 states.