/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 10:06:52,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 10:06:52,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 10:06:52,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 10:06:52,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 10:06:52,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 10:06:52,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 10:06:52,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 10:06:52,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 10:06:52,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 10:06:52,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 10:06:52,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 10:06:52,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 10:06:52,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 10:06:52,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 10:06:52,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 10:06:52,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 10:06:52,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 10:06:52,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 10:06:52,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 10:06:52,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 10:06:52,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 10:06:52,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 10:06:52,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 10:06:52,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 10:06:52,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 10:06:52,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 10:06:52,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 10:06:52,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 10:06:52,349 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 10:06:52,350 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 10:06:52,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 10:06:52,352 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 10:06:52,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 10:06:52,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 10:06:52,354 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 10:06:52,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 10:06:52,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 10:06:52,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 10:06:52,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 10:06:52,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 10:06:52,358 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 10:06:52,385 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 10:06:52,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 10:06:52,386 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 10:06:52,387 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 10:06:52,387 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 10:06:52,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 10:06:52,387 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 10:06:52,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 10:06:52,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 10:06:52,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 10:06:52,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 10:06:52,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 10:06:52,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 10:06:52,389 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 10:06:52,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 10:06:52,389 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 10:06:52,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 10:06:52,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 10:06:52,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 10:06:52,390 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 10:06:52,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 10:06:52,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:06:52,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 10:06:52,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 10:06:52,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 10:06:52,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 10:06:52,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 10:06:52,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 10:06:52,392 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 10:06:52,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-09-25 10:06:52,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 10:06:52,889 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 10:06:52,894 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 10:06:52,896 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 10:06:52,897 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 10:06:52,898 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label36.c [2020-09-25 10:06:52,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/250bbf9e7/ac410c7cb7c44a2686008dd12e4380bb/FLAGd7ef9d906 [2020-09-25 10:06:53,637 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 10:06:53,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label36.c [2020-09-25 10:06:53,664 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/250bbf9e7/ac410c7cb7c44a2686008dd12e4380bb/FLAGd7ef9d906 [2020-09-25 10:06:53,852 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/250bbf9e7/ac410c7cb7c44a2686008dd12e4380bb [2020-09-25 10:06:53,866 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 10:06:53,873 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 10:06:53,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 10:06:53,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 10:06:53,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 10:06:53,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:06:53" (1/1) ... [2020-09-25 10:06:53,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@88af870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:53, skipping insertion in model container [2020-09-25 10:06:53,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:06:53" (1/1) ... [2020-09-25 10:06:53,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 10:06:53,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 10:06:54,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:06:54,442 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 10:06:54,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:06:54,651 INFO L208 MainTranslator]: Completed translation [2020-09-25 10:06:54,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:54 WrapperNode [2020-09-25 10:06:54,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 10:06:54,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 10:06:54,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 10:06:54,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 10:06:54,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:54" (1/1) ... [2020-09-25 10:06:54,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:54" (1/1) ... [2020-09-25 10:06:54,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:54" (1/1) ... [2020-09-25 10:06:54,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:54" (1/1) ... [2020-09-25 10:06:54,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:54" (1/1) ... [2020-09-25 10:06:54,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:54" (1/1) ... [2020-09-25 10:06:54,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:54" (1/1) ... [2020-09-25 10:06:54,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 10:06:54,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 10:06:54,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 10:06:54,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 10:06:54,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:06:54,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 10:06:54,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 10:06:54,875 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 10:06:54,875 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 10:06:54,875 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 10:06:54,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 10:06:54,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 10:06:54,877 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 10:06:54,877 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 10:06:54,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 10:06:54,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 10:06:56,131 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 10:06:56,131 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 10:06:56,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:06:56 BoogieIcfgContainer [2020-09-25 10:06:56,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 10:06:56,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 10:06:56,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 10:06:56,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 10:06:56,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:06:53" (1/3) ... [2020-09-25 10:06:56,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ece744c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:06:56, skipping insertion in model container [2020-09-25 10:06:56,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:54" (2/3) ... [2020-09-25 10:06:56,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ece744c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:06:56, skipping insertion in model container [2020-09-25 10:06:56,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:06:56" (3/3) ... [2020-09-25 10:06:56,150 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label36.c [2020-09-25 10:06:56,163 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 10:06:56,174 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 10:06:56,197 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 10:06:56,230 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 10:06:56,231 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 10:06:56,231 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 10:06:56,231 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 10:06:56,231 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 10:06:56,231 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 10:06:56,232 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 10:06:56,232 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 10:06:56,263 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 10:06:56,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-09-25 10:06:56,283 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:06:56,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:06:56,285 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:06:56,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:06:56,293 INFO L82 PathProgramCache]: Analyzing trace with hash -888076393, now seen corresponding path program 1 times [2020-09-25 10:06:56,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:06:56,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316023275] [2020-09-25 10:06:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:06:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:56,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:56,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:57,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:58,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:59,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:01,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:01,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-09-25 10:07:01,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 10:07:01,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 10:07:01,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:01,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:01,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:07:01,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 10:07:01,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-09-25 10:07:01,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 10:07:01,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:07:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:01,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:01,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:01,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 10:07:01,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:07:01,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-25 10:07:01,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:01,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:01,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:07:01,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:07:01,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 10:07:01,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:07:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:07:01,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316023275] [2020-09-25 10:07:01,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:07:01,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 10:07:01,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62503363] [2020-09-25 10:07:01,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 10:07:01,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:07:02,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 10:07:02,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:07:02,021 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 5 states. [2020-09-25 10:07:04,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:07:04,696 INFO L93 Difference]: Finished difference Result 1360 states and 1895 transitions. [2020-09-25 10:07:04,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 10:07:04,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2020-09-25 10:07:04,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:07:04,740 INFO L225 Difference]: With dead ends: 1360 [2020-09-25 10:07:04,740 INFO L226 Difference]: Without dead ends: 781 [2020-09-25 10:07:04,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 10:07:04,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2020-09-25 10:07:04,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 746. [2020-09-25 10:07:04,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 746 states. [2020-09-25 10:07:04,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 914 transitions. [2020-09-25 10:07:04,867 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 914 transitions. Word has length 130 [2020-09-25 10:07:04,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:07:04,868 INFO L479 AbstractCegarLoop]: Abstraction has 746 states and 914 transitions. [2020-09-25 10:07:04,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 10:07:04,868 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 914 transitions. [2020-09-25 10:07:04,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-09-25 10:07:04,879 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:07:04,879 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:07:04,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 10:07:04,880 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:07:04,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:07:04,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1251434408, now seen corresponding path program 1 times [2020-09-25 10:07:04,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:07:04,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877099344] [2020-09-25 10:07:04,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:07:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:04,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:05,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:05,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:05,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:05,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:06,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:06,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:06,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:08,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:09,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:09,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-09-25 10:07:09,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 10:07:09,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-25 10:07:09,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:09,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:09,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-25 10:07:09,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 10:07:09,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-09-25 10:07:09,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:07:10,435 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-09-25 10:07:10,560 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2020-09-25 10:07:10,704 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-09-25 10:07:10,846 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-09-25 10:07:10,983 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-09-25 10:07:11,119 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-09-25 10:07:11,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:07:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:11,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:11,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:11,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 10:07:11,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:07:11,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 10:07:11,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:11,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:11,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:07:11,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:07:11,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 10:07:11,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:07:11,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 10:07:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:11,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:12,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:12,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:12,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 10:07:12,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:07:12,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-09-25 10:07:12,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:12,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:12,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:07:12,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:07:12,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 10:07:12,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:07:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:07:12,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877099344] [2020-09-25 10:07:12,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:07:12,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-25 10:07:12,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299053767] [2020-09-25 10:07:12,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-25 10:07:12,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:07:12,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-25 10:07:12,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=415, Unknown=0, NotChecked=0, Total=650 [2020-09-25 10:07:12,395 INFO L87 Difference]: Start difference. First operand 746 states and 914 transitions. Second operand 26 states. [2020-09-25 10:07:12,808 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2020-09-25 10:07:13,036 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-09-25 10:07:13,216 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-09-25 10:07:13,378 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-09-25 10:07:14,231 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-09-25 10:07:14,916 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-09-25 10:07:15,143 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-09-25 10:07:15,439 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2020-09-25 10:07:15,759 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-09-25 10:07:15,968 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-09-25 10:07:16,224 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-09-25 10:07:16,424 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-09-25 10:07:16,646 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-09-25 10:07:16,830 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-09-25 10:07:17,508 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-09-25 10:07:17,774 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-09-25 10:07:18,067 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-09-25 10:07:18,379 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-09-25 10:07:19,145 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-09-25 10:07:19,392 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-09-25 10:07:19,625 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-09-25 10:07:19,982 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-09-25 10:07:20,480 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-09-25 10:07:20,723 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-09-25 10:07:21,039 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-09-25 10:07:21,555 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-09-25 10:07:22,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:07:22,058 INFO L93 Difference]: Finished difference Result 2686 states and 3599 transitions. [2020-09-25 10:07:22,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-25 10:07:22,058 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 151 [2020-09-25 10:07:22,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:07:22,070 INFO L225 Difference]: With dead ends: 2686 [2020-09-25 10:07:22,070 INFO L226 Difference]: Without dead ends: 1938 [2020-09-25 10:07:22,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1423, Invalid=2737, Unknown=0, NotChecked=0, Total=4160 [2020-09-25 10:07:22,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2020-09-25 10:07:22,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1562. [2020-09-25 10:07:22,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1562 states. [2020-09-25 10:07:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 1917 transitions. [2020-09-25 10:07:22,151 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 1917 transitions. Word has length 151 [2020-09-25 10:07:22,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:07:22,152 INFO L479 AbstractCegarLoop]: Abstraction has 1562 states and 1917 transitions. [2020-09-25 10:07:22,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-25 10:07:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 1917 transitions. [2020-09-25 10:07:22,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-09-25 10:07:22,158 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:07:22,159 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:07:22,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 10:07:22,159 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:07:22,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:07:22,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1493517159, now seen corresponding path program 1 times [2020-09-25 10:07:22,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:07:22,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596912005] [2020-09-25 10:07:22,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:07:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:22,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:22,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:22,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:22,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:22,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:22,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:23,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:23,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:26,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:27,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:27,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-09-25 10:07:27,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 10:07:27,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-09-25 10:07:27,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:27,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:27,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:07:27,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-09-25 10:07:27,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-09-25 10:07:27,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:07:27,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:07:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:27,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:27,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:27,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 10:07:27,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:07:27,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 10:07:27,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:27,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:27,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:07:27,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:07:27,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:07:27,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:07:27,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 10:07:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:27,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:27,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:27,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 10:07:27,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:07:27,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 10:07:27,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:27,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:27,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:07:27,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:07:27,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 10:07:27,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:07:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:07:27,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596912005] [2020-09-25 10:07:27,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:07:27,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 10:07:27,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123458110] [2020-09-25 10:07:27,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 10:07:27,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:07:27,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 10:07:27,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:07:27,502 INFO L87 Difference]: Start difference. First operand 1562 states and 1917 transitions. Second operand 5 states. [2020-09-25 10:07:29,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:07:29,615 INFO L93 Difference]: Finished difference Result 3617 states and 4509 transitions. [2020-09-25 10:07:29,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 10:07:29,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2020-09-25 10:07:29,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:07:29,632 INFO L225 Difference]: With dead ends: 3617 [2020-09-25 10:07:29,632 INFO L226 Difference]: Without dead ends: 2079 [2020-09-25 10:07:29,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 10:07:29,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2020-09-25 10:07:29,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 1876. [2020-09-25 10:07:29,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1876 states. [2020-09-25 10:07:29,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 2298 transitions. [2020-09-25 10:07:29,711 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 2298 transitions. Word has length 158 [2020-09-25 10:07:29,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:07:29,713 INFO L479 AbstractCegarLoop]: Abstraction has 1876 states and 2298 transitions. [2020-09-25 10:07:29,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 10:07:29,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 2298 transitions. [2020-09-25 10:07:29,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-09-25 10:07:29,725 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:07:29,725 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:07:29,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 10:07:29,726 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:07:29,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:07:29,726 INFO L82 PathProgramCache]: Analyzing trace with hash 2040841548, now seen corresponding path program 1 times [2020-09-25 10:07:29,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:07:29,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213269515] [2020-09-25 10:07:29,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:07:29,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:29,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:29,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:30,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:30,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:30,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:31,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:31,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:31,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:34,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:34,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-09-25 10:07:34,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 10:07:34,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-09-25 10:07:34,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:34,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:34,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 10:07:34,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 10:07:34,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-09-25 10:07:34,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 10:07:35,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:07:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:35,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:35,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:35,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 10:07:35,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:07:35,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-25 10:07:35,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:35,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:35,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 10:07:35,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:07:35,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 10:07:35,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:07:35,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 10:07:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:35,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:35,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:35,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:35,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 10:07:35,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:07:35,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-25 10:07:35,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:35,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:35,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:07:35,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 10:07:35,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 10:07:35,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:07:35,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-25 10:07:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:35,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:35,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:35,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:35,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 10:07:35,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:07:35,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-09-25 10:07:35,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:35,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:35,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:07:35,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 10:07:35,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 10:07:35,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:07:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-25 10:07:35,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213269515] [2020-09-25 10:07:35,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:07:35,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 10:07:35,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048779225] [2020-09-25 10:07:35,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 10:07:35,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:07:35,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 10:07:35,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-09-25 10:07:35,844 INFO L87 Difference]: Start difference. First operand 1876 states and 2298 transitions. Second operand 14 states. [2020-09-25 10:07:37,571 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-09-25 10:07:40,469 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-09-25 10:07:40,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:07:40,954 INFO L93 Difference]: Finished difference Result 4999 states and 6270 transitions. [2020-09-25 10:07:40,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 10:07:40,955 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 173 [2020-09-25 10:07:40,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:07:40,971 INFO L225 Difference]: With dead ends: 4999 [2020-09-25 10:07:40,971 INFO L226 Difference]: Without dead ends: 2103 [2020-09-25 10:07:40,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-09-25 10:07:40,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2020-09-25 10:07:41,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 1933. [2020-09-25 10:07:41,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1933 states. [2020-09-25 10:07:41,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 2307 transitions. [2020-09-25 10:07:41,054 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 2307 transitions. Word has length 173 [2020-09-25 10:07:41,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:07:41,055 INFO L479 AbstractCegarLoop]: Abstraction has 1933 states and 2307 transitions. [2020-09-25 10:07:41,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 10:07:41,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 2307 transitions. [2020-09-25 10:07:41,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-09-25 10:07:41,066 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:07:41,066 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-25 10:07:41,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 10:07:41,067 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:07:41,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:07:41,067 INFO L82 PathProgramCache]: Analyzing trace with hash -253437247, now seen corresponding path program 1 times [2020-09-25 10:07:41,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:07:41,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633882123] [2020-09-25 10:07:41,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:07:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:41,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:41,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:42,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:42,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:42,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:44,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:44,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking...