/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/Problem02_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:43:04,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:43:04,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:43:04,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:43:04,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:43:04,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:43:04,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:43:04,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:43:04,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:43:04,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:43:04,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:43:04,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:43:04,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:43:04,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:43:04,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:43:04,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:43:04,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:43:04,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:43:04,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:43:04,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:43:04,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:43:04,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:43:04,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:43:04,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:43:04,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:43:04,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:43:04,551 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:43:04,552 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:43:04,554 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:43:04,555 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:43:04,555 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:43:04,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:43:04,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:43:04,558 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:43:04,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:43:04,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:43:04,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:43:04,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:43:04,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:43:04,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:43:04,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:43:04,564 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 21:43:04,612 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:43:04,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:43:04,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:43:04,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:43:04,615 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:43:04,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:43:04,615 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:43:04,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:43:04,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:43:04,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:43:04,617 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:43:04,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:43:04,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:43:04,618 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:43:04,618 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:43:04,618 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:43:04,619 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:43:04,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:43:04,619 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:43:04,619 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:43:04,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:43:04,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:43:04,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:43:04,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:43:04,620 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:43:04,620 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:43:04,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:43:04,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:43:04,621 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:43:04,621 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 21:43:05,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:43:05,091 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:43:05,095 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:43:05,097 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:43:05,098 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:43:05,099 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label44.c [2020-09-24 21:43:05,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/265c22dfe/4dd0cbd0a90045109fbc8690c7591e26/FLAG4f43f5390 [2020-09-24 21:43:05,774 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:43:05,775 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label44.c [2020-09-24 21:43:05,791 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/265c22dfe/4dd0cbd0a90045109fbc8690c7591e26/FLAG4f43f5390 [2020-09-24 21:43:06,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/265c22dfe/4dd0cbd0a90045109fbc8690c7591e26 [2020-09-24 21:43:06,036 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:43:06,043 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:43:06,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:06,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:43:06,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:43:06,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:43:06" (1/1) ... [2020-09-24 21:43:06,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4734e8fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:06, skipping insertion in model container [2020-09-24 21:43:06,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:43:06" (1/1) ... [2020-09-24 21:43:06,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:43:06,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:43:06,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:06,603 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:43:06,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:06,834 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:43:06,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:06 WrapperNode [2020-09-24 21:43:06,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:06,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:43:06,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:43:06,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:43:06,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:06" (1/1) ... [2020-09-24 21:43:06,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:06" (1/1) ... [2020-09-24 21:43:06,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:06" (1/1) ... [2020-09-24 21:43:06,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:06" (1/1) ... [2020-09-24 21:43:06,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:06" (1/1) ... [2020-09-24 21:43:06,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:06" (1/1) ... [2020-09-24 21:43:06,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:06" (1/1) ... [2020-09-24 21:43:06,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:43:06,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:43:06,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:43:06,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:43:06,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:06" (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 21:43:07,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:43:07,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:43:07,032 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:43:07,032 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:43:07,032 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:43:07,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:43:07,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:43:07,032 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:43:07,034 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:43:07,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:43:07,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:43:08,375 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:43:08,375 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:43:08,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:08 BoogieIcfgContainer [2020-09-24 21:43:08,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:43:08,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:43:08,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:43:08,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:43:08,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:43:06" (1/3) ... [2020-09-24 21:43:08,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526e8696 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:08, skipping insertion in model container [2020-09-24 21:43:08,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:06" (2/3) ... [2020-09-24 21:43:08,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526e8696 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:08, skipping insertion in model container [2020-09-24 21:43:08,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:08" (3/3) ... [2020-09-24 21:43:08,396 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label44.c [2020-09-24 21:43:08,407 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:43:08,418 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:43:08,441 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:43:08,480 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:43:08,480 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:43:08,480 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:43:08,481 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:43:08,481 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:43:08,481 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:43:08,481 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:43:08,481 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:43:08,516 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:43:08,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-09-24 21:43:08,534 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:08,535 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] [2020-09-24 21:43:08,535 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:08,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:08,541 INFO L82 PathProgramCache]: Analyzing trace with hash -118135375, now seen corresponding path program 1 times [2020-09-24 21:43:08,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:08,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436210047] [2020-09-24 21:43:08,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:08,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:09,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:09,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:11,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:11,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:12,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:13,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:13,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-09-24 21:43:13,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:43:13,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 21:43:13,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:13,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:43:13,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:43:13,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:43:13,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:43:14,319 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-09-24 21:43:14,439 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-09-24 21:43:14,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:14,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:14,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:14,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:14,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:14,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-09-24 21:43:14,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:14,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:43:14,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:14,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:14,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:15,154 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 21:43:15,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436210047] [2020-09-24 21:43:15,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:43:15,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 21:43:15,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659106248] [2020-09-24 21:43:15,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:43:15,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:15,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:43:15,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:43:15,183 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 21:43:15,758 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-09-24 21:43:16,086 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 98 [2020-09-24 21:43:16,382 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 95 [2020-09-24 21:43:16,798 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-09-24 21:43:17,121 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-09-24 21:43:17,576 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 91 [2020-09-24 21:43:18,751 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2020-09-24 21:43:18,958 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-09-24 21:43:19,305 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-09-24 21:43:20,031 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2020-09-24 21:43:20,510 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2020-09-24 21:43:20,727 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-09-24 21:43:21,661 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-09-24 21:43:22,077 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-09-24 21:43:24,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:24,448 INFO L93 Difference]: Finished difference Result 1870 states and 2662 transitions. [2020-09-24 21:43:24,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:43:24,451 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 114 [2020-09-24 21:43:24,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:24,483 INFO L225 Difference]: With dead ends: 1870 [2020-09-24 21:43:24,484 INFO L226 Difference]: Without dead ends: 1241 [2020-09-24 21:43:24,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:43:24,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2020-09-24 21:43:24,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1076. [2020-09-24 21:43:24,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1076 states. [2020-09-24 21:43:24,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1294 transitions. [2020-09-24 21:43:24,624 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1294 transitions. Word has length 114 [2020-09-24 21:43:24,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:24,625 INFO L479 AbstractCegarLoop]: Abstraction has 1076 states and 1294 transitions. [2020-09-24 21:43:24,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:43:24,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1294 transitions. [2020-09-24 21:43:24,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-24 21:43:24,637 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:24,637 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:43:24,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:43:24,638 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:24,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:24,638 INFO L82 PathProgramCache]: Analyzing trace with hash -889034989, now seen corresponding path program 1 times [2020-09-24 21:43:24,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:24,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528827322] [2020-09-24 21:43:24,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:24,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:24,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:24,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:25,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:26,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:26,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:27,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:27,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:29,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:29,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-09-24 21:43:29,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:43:29,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-24 21:43:29,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:29,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:43:29,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:43:29,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:43:29,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:30,436 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2020-09-24 21:43:30,644 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 44 [2020-09-24 21:43:30,854 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 40 [2020-09-24 21:43:31,039 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 36 [2020-09-24 21:43:31,210 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 31 [2020-09-24 21:43:31,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:31,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:31,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:31,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:31,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:31,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-24 21:43:31,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:31,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:43:31,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:31,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:31,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:31,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:43:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:31,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:31,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:31,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:43:31,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:31,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-09-24 21:43:31,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:31,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:43:31,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:31,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:43:31,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:31,735 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:43:31,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528827322] [2020-09-24 21:43:31,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:43:31,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:43:31,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253914269] [2020-09-24 21:43:31,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:43:31,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:31,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:43:31,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:43:31,739 INFO L87 Difference]: Start difference. First operand 1076 states and 1294 transitions. Second operand 19 states. [2020-09-24 21:43:32,610 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2020-09-24 21:43:32,972 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 108 [2020-09-24 21:43:33,558 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 101 [2020-09-24 21:43:33,935 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 98 [2020-09-24 21:43:34,157 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-09-24 21:43:34,647 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-09-24 21:43:34,993 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-09-24 21:43:35,479 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2020-09-24 21:43:35,620 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-09-24 21:43:35,971 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2020-09-24 21:43:36,348 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 95 [2020-09-24 21:43:37,233 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-09-24 21:43:37,947 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2020-09-24 21:43:38,428 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 90 [2020-09-24 21:43:39,336 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2020-09-24 21:43:39,946 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 76 [2020-09-24 21:43:40,399 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2020-09-24 21:43:40,898 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2020-09-24 21:43:42,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:42,911 INFO L93 Difference]: Finished difference Result 4103 states and 5490 transitions. [2020-09-24 21:43:42,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 21:43:42,912 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 136 [2020-09-24 21:43:42,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:42,939 INFO L225 Difference]: With dead ends: 4103 [2020-09-24 21:43:42,940 INFO L226 Difference]: Without dead ends: 3107 [2020-09-24 21:43:42,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=593, Invalid=1477, Unknown=0, NotChecked=0, Total=2070 [2020-09-24 21:43:42,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2020-09-24 21:43:43,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 3029. [2020-09-24 21:43:43,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3029 states. [2020-09-24 21:43:43,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 3673 transitions. [2020-09-24 21:43:43,085 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 3673 transitions. Word has length 136 [2020-09-24 21:43:43,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:43,087 INFO L479 AbstractCegarLoop]: Abstraction has 3029 states and 3673 transitions. [2020-09-24 21:43:43,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:43:43,088 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 3673 transitions. [2020-09-24 21:43:43,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-09-24 21:43:43,103 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:43,103 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 21:43:43,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:43:43,104 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:43,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:43,104 INFO L82 PathProgramCache]: Analyzing trace with hash -294296002, now seen corresponding path program 1 times [2020-09-24 21:43:43,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:43,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424198655] [2020-09-24 21:43:43,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:43,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:43,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:43,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:43,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:44,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:44,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:46,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:46,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:48,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:48,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-09-24 21:43:48,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:43:48,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-09-24 21:43:48,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:48,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:43:48,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:43:48,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:43:48,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:48,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:48,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:48,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:48,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:48,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:48,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-09-24 21:43:48,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:48,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:43:48,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:48,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-24 21:43:48,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:43:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:48,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:48,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:48,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:48,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:43:48,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:43:48,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-24 21:43:48,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:48,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:43:48,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:48,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:43:48,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:48,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:43:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:48,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:48,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:48,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:48,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:43:48,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:43:48,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-09-24 21:43:48,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:48,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:43:48,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:48,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:43:48,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 21:43:48,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424198655] [2020-09-24 21:43:48,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:43:48,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:43:48,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454822485] [2020-09-24 21:43:48,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:43:48,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:48,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:43:48,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:43:48,904 INFO L87 Difference]: Start difference. First operand 3029 states and 3673 transitions. Second operand 12 states. [2020-09-24 21:43:49,723 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-09-24 21:43:50,201 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-09-24 21:43:51,883 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-09-24 21:43:54,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:54,847 INFO L93 Difference]: Finished difference Result 8675 states and 11482 transitions. [2020-09-24 21:43:54,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 21:43:54,848 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 149 [2020-09-24 21:43:54,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:54,879 INFO L225 Difference]: With dead ends: 8675 [2020-09-24 21:43:54,879 INFO L226 Difference]: Without dead ends: 5480 [2020-09-24 21:43:54,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-24 21:43:54,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5480 states. [2020-09-24 21:43:55,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5480 to 4832. [2020-09-24 21:43:55,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4832 states. [2020-09-24 21:43:55,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4832 states to 4832 states and 5961 transitions. [2020-09-24 21:43:55,049 INFO L78 Accepts]: Start accepts. Automaton has 4832 states and 5961 transitions. Word has length 149 [2020-09-24 21:43:55,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:55,049 INFO L479 AbstractCegarLoop]: Abstraction has 4832 states and 5961 transitions. [2020-09-24 21:43:55,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:43:55,049 INFO L276 IsEmpty]: Start isEmpty. Operand 4832 states and 5961 transitions. [2020-09-24 21:43:55,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-09-24 21:43:55,061 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:55,062 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:43:55,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:43:55,062 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:55,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:55,063 INFO L82 PathProgramCache]: Analyzing trace with hash -2051111511, now seen corresponding path program 1 times [2020-09-24 21:43:55,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:55,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402688661] [2020-09-24 21:43:55,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:55,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:55,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:55,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:55,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:55,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:56,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking...