/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --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_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 07:54:09,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 07:54:09,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 07:54:09,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 07:54:09,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 07:54:09,245 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 07:54:09,246 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 07:54:09,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 07:54:09,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 07:54:09,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 07:54:09,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 07:54:09,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 07:54:09,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 07:54:09,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 07:54:09,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 07:54:09,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 07:54:09,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 07:54:09,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 07:54:09,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 07:54:09,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 07:54:09,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 07:54:09,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 07:54:09,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 07:54:09,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 07:54:09,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 07:54:09,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 07:54:09,272 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 07:54:09,273 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 07:54:09,273 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 07:54:09,274 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 07:54:09,274 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 07:54:09,275 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 07:54:09,276 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 07:54:09,277 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 07:54:09,278 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 07:54:09,278 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 07:54:09,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 07:54:09,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 07:54:09,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 07:54:09,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 07:54:09,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 07:54:09,282 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 07:54:09,306 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 07:54:09,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 07:54:09,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 07:54:09,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 07:54:09,308 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 07:54:09,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 07:54:09,309 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 07:54:09,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 07:54:09,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 07:54:09,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 07:54:09,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 07:54:09,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 07:54:09,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 07:54:09,310 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 07:54:09,310 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 07:54:09,311 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 07:54:09,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 07:54:09,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 07:54:09,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 07:54:09,311 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 07:54:09,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 07:54:09,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 07:54:09,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 07:54:09,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 07:54:09,312 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 07:54:09,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 07:54:09,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 07:54:09,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 07:54:09,313 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 07:54:09,313 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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-09-25 07:54:09,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 07:54:09,775 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 07:54:09,782 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 07:54:09,784 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 07:54:09,786 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 07:54:09,787 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label32.c [2020-09-25 07:54:09,880 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f640e875/b7ce2bbabe594f7abb5b383f9e663ec7/FLAG802df4e34 [2020-09-25 07:54:10,533 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 07:54:10,534 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label32.c [2020-09-25 07:54:10,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f640e875/b7ce2bbabe594f7abb5b383f9e663ec7/FLAG802df4e34 [2020-09-25 07:54:10,761 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f640e875/b7ce2bbabe594f7abb5b383f9e663ec7 [2020-09-25 07:54:10,775 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 07:54:10,780 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 07:54:10,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 07:54:10,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 07:54:10,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 07:54:10,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 07:54:10" (1/1) ... [2020-09-25 07:54:10,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5783693b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:54:10, skipping insertion in model container [2020-09-25 07:54:10,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 07:54:10" (1/1) ... [2020-09-25 07:54:10,802 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 07:54:10,859 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 07:54:11,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 07:54:11,340 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 07:54:11,599 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 07:54:11,626 INFO L208 MainTranslator]: Completed translation [2020-09-25 07:54:11,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:54:11 WrapperNode [2020-09-25 07:54:11,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 07:54:11,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 07:54:11,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 07:54:11,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 07:54:11,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:54:11" (1/1) ... [2020-09-25 07:54:11,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:54:11" (1/1) ... [2020-09-25 07:54:11,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:54:11" (1/1) ... [2020-09-25 07:54:11,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:54:11" (1/1) ... [2020-09-25 07:54:11,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:54:11" (1/1) ... [2020-09-25 07:54:11,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:54:11" (1/1) ... [2020-09-25 07:54:11,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:54:11" (1/1) ... [2020-09-25 07:54:11,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 07:54:11,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 07:54:11,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 07:54:11,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 07:54:11,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:54:11" (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 07:54:11,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 07:54:11,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 07:54:11,851 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 07:54:11,851 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 07:54:11,851 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 07:54:11,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 07:54:11,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 07:54:11,853 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 07:54:11,853 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 07:54:11,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 07:54:11,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 07:54:13,456 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 07:54:13,456 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 07:54:13,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 07:54:13 BoogieIcfgContainer [2020-09-25 07:54:13,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 07:54:13,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 07:54:13,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 07:54:13,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 07:54:13,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 07:54:10" (1/3) ... [2020-09-25 07:54:13,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@786d3a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 07:54:13, skipping insertion in model container [2020-09-25 07:54:13,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:54:11" (2/3) ... [2020-09-25 07:54:13,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@786d3a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 07:54:13, skipping insertion in model container [2020-09-25 07:54:13,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 07:54:13" (3/3) ... [2020-09-25 07:54:13,475 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label32.c [2020-09-25 07:54:13,488 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 07:54:13,505 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 07:54:13,528 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 07:54:13,573 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 07:54:13,574 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 07:54:13,574 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 07:54:13,574 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 07:54:13,574 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 07:54:13,575 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 07:54:13,575 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 07:54:13,575 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 07:54:13,613 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 07:54:13,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-25 07:54:13,634 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:54:13,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:54:13,636 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:54:13,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:54:13,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1568421906, now seen corresponding path program 1 times [2020-09-25 07:54:13,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:54:13,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106040551] [2020-09-25 07:54:13,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:54:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:14,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:14,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:14,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:15,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:16,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:17,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:17,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:17,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:17,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:18,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:18,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-09-25 07:54:18,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 07:54:18,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 07:54:18,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:18,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:18,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 07:54:18,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 07:54:18,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-09-25 07:54:18,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-25 07:54:19,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:54:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:19,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:19,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:19,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 07:54:19,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:19,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 07:54:19,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:19,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:19,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:54:19,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:19,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 07:54:19,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:19,299 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 07:54:19,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106040551] [2020-09-25 07:54:19,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:54:19,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 07:54:19,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172744384] [2020-09-25 07:54:19,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 07:54:19,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:54:19,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 07:54:19,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 07:54:19,333 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 07:54:21,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:54:21,684 INFO L93 Difference]: Finished difference Result 1247 states and 1695 transitions. [2020-09-25 07:54:21,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 07:54:21,687 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-09-25 07:54:21,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:54:21,728 INFO L225 Difference]: With dead ends: 1247 [2020-09-25 07:54:21,728 INFO L226 Difference]: Without dead ends: 669 [2020-09-25 07:54:21,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 07:54:21,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2020-09-25 07:54:21,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 621. [2020-09-25 07:54:21,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-09-25 07:54:21,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 723 transitions. [2020-09-25 07:54:21,860 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 723 transitions. Word has length 135 [2020-09-25 07:54:21,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:54:21,864 INFO L479 AbstractCegarLoop]: Abstraction has 621 states and 723 transitions. [2020-09-25 07:54:21,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 07:54:21,865 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 723 transitions. [2020-09-25 07:54:21,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-25 07:54:21,877 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:54:21,878 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:54:21,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 07:54:21,878 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:54:21,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:54:21,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1119247929, now seen corresponding path program 1 times [2020-09-25 07:54:21,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:54:21,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880572194] [2020-09-25 07:54:21,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:54:21,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:21,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:22,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:22,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:23,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:23,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:25,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:25,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:25,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:26,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:26,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-09-25 07:54:26,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 07:54:26,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-25 07:54:26,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:26,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:26,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:54:26,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 07:54:26,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-09-25 07:54:26,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:27,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:54:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:27,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:27,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:27,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 07:54:27,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:27,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 07:54:27,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:27,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:27,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:54:27,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:27,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:54:27,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:27,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 07:54:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:27,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:27,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:27,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 07:54:27,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:27,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 07:54:27,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:27,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:27,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:54:27,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:27,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 07:54:27,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:54:27,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880572194] [2020-09-25 07:54:27,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:54:27,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 07:54:27,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380272723] [2020-09-25 07:54:27,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 07:54:27,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:54:27,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 07:54:27,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 07:54:27,193 INFO L87 Difference]: Start difference. First operand 621 states and 723 transitions. Second operand 5 states. [2020-09-25 07:54:29,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:54:29,216 INFO L93 Difference]: Finished difference Result 1533 states and 1847 transitions. [2020-09-25 07:54:29,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 07:54:29,217 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-09-25 07:54:29,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:54:29,224 INFO L225 Difference]: With dead ends: 1533 [2020-09-25 07:54:29,224 INFO L226 Difference]: Without dead ends: 934 [2020-09-25 07:54:29,227 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 07:54:29,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2020-09-25 07:54:29,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 924. [2020-09-25 07:54:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 924 states. [2020-09-25 07:54:29,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1105 transitions. [2020-09-25 07:54:29,272 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1105 transitions. Word has length 152 [2020-09-25 07:54:29,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:54:29,273 INFO L479 AbstractCegarLoop]: Abstraction has 924 states and 1105 transitions. [2020-09-25 07:54:29,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 07:54:29,273 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1105 transitions. [2020-09-25 07:54:29,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-09-25 07:54:29,278 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:54:29,278 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:54:29,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 07:54:29,279 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:54:29,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:54:29,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1353322846, now seen corresponding path program 1 times [2020-09-25 07:54:29,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:54:29,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442294757] [2020-09-25 07:54:29,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:54:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:29,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:29,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:29,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:30,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:30,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:30,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:34,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:34,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-09-25 07:54:34,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 07:54:34,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-25 07:54:34,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:34,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:34,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:54:34,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 07:54:34,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 07:54:34,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:34,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:54:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:34,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:34,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:34,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 07:54:34,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:34,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 07:54:34,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:34,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:34,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:54:34,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:34,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:54:34,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:34,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 07:54:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:34,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:34,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:34,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 07:54:34,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:34,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 07:54:34,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:34,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:34,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:54:34,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:34,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 07:54:34,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:34,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 07:54:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:34,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:34,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:34,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 07:54:34,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:34,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-09-25 07:54:34,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:34,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:34,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:54:34,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 07:54:34,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 07:54:34,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 07:54:34,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442294757] [2020-09-25 07:54:34,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:54:34,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 07:54:34,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104149745] [2020-09-25 07:54:34,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 07:54:34,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:54:34,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 07:54:34,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 07:54:34,683 INFO L87 Difference]: Start difference. First operand 924 states and 1105 transitions. Second operand 7 states. [2020-09-25 07:54:37,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:54:37,277 INFO L93 Difference]: Finished difference Result 2417 states and 3013 transitions. [2020-09-25 07:54:37,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 07:54:37,278 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 186 [2020-09-25 07:54:37,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:54:37,291 INFO L225 Difference]: With dead ends: 2417 [2020-09-25 07:54:37,291 INFO L226 Difference]: Without dead ends: 1515 [2020-09-25 07:54:37,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-25 07:54:37,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2020-09-25 07:54:37,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1245. [2020-09-25 07:54:37,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1245 states. [2020-09-25 07:54:37,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1560 transitions. [2020-09-25 07:54:37,382 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1560 transitions. Word has length 186 [2020-09-25 07:54:37,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:54:37,382 INFO L479 AbstractCegarLoop]: Abstraction has 1245 states and 1560 transitions. [2020-09-25 07:54:37,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 07:54:37,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1560 transitions. [2020-09-25 07:54:37,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-09-25 07:54:37,390 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:54:37,390 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:54:37,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 07:54:37,391 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:54:37,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:54:37,392 INFO L82 PathProgramCache]: Analyzing trace with hash 853921109, now seen corresponding path program 1 times [2020-09-25 07:54:37,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:54:37,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884056090] [2020-09-25 07:54:37,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:54:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:37,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:37,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:37,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:38,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:38,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:41,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:41,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-09-25 07:54:41,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 07:54:41,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4550 [2020-09-25 07:54:41,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:41,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:41,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:54:41,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-09-25 07:54:41,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-09-25 07:54:41,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:42,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:54:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:42,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:42,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:42,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 07:54:42,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:42,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 07:54:42,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:42,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:42,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:54:42,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:42,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:54:42,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:42,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 07:54:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:42,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:42,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:42,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 07:54:42,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:42,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 07:54:42,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:42,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:42,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:54:42,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:42,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:54:42,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:42,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-25 07:54:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:42,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:42,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:42,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 07:54:42,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:42,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-25 07:54:42,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:42,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:42,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:54:42,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:42,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 07:54:42,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:42,278 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-09-25 07:54:42,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884056090] [2020-09-25 07:54:42,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:54:42,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 07:54:42,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164428329] [2020-09-25 07:54:42,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 07:54:42,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:54:42,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 07:54:42,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 07:54:42,285 INFO L87 Difference]: Start difference. First operand 1245 states and 1560 transitions. Second operand 5 states. [2020-09-25 07:54:44,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:54:44,249 INFO L93 Difference]: Finished difference Result 3238 states and 4216 transitions. [2020-09-25 07:54:44,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 07:54:44,250 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 191 [2020-09-25 07:54:44,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:54:44,262 INFO L225 Difference]: With dead ends: 3238 [2020-09-25 07:54:44,262 INFO L226 Difference]: Without dead ends: 1487 [2020-09-25 07:54:44,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 07:54:44,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2020-09-25 07:54:44,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1476. [2020-09-25 07:54:44,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1476 states. [2020-09-25 07:54:44,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 1772 transitions. [2020-09-25 07:54:44,346 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 1772 transitions. Word has length 191 [2020-09-25 07:54:44,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:54:44,348 INFO L479 AbstractCegarLoop]: Abstraction has 1476 states and 1772 transitions. [2020-09-25 07:54:44,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 07:54:44,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 1772 transitions. [2020-09-25 07:54:44,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-09-25 07:54:44,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:54:44,355 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:54:44,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 07:54:44,356 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:54:44,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:54:44,356 INFO L82 PathProgramCache]: Analyzing trace with hash 867866385, now seen corresponding path program 1 times [2020-09-25 07:54:44,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:54:44,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81664265] [2020-09-25 07:54:44,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:54:44,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:44,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:44,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:45,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:45,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:45,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:46,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:47,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:49,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:49,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:49,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:49,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-09-25 07:54:49,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 07:54:49,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-09-25 07:54:49,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:49,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:49,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 07:54:49,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-09-25 07:54:49,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-09-25 07:54:49,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 07:54:49,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:54:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:49,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:49,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:49,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 07:54:49,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:49,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 07:54:49,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:49,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:49,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:54:49,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:49,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:54:49,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:49,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 07:54:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:49,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:49,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:49,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 07:54:49,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:49,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-25 07:54:49,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:49,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:49,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:54:49,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:49,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 07:54:49,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:49,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-25 07:54:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:49,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:49,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:49,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:49,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 07:54:49,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 07:54:49,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-25 07:54:49,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:49,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:49,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:54:49,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:49,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 07:54:49,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-25 07:54:49,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81664265] [2020-09-25 07:54:49,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:54:49,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 07:54:49,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184946726] [2020-09-25 07:54:49,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 07:54:49,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:54:49,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 07:54:49,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 07:54:49,879 INFO L87 Difference]: Start difference. First operand 1476 states and 1772 transitions. Second operand 5 states. [2020-09-25 07:54:51,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:54:51,461 INFO L93 Difference]: Finished difference Result 3692 states and 4544 transitions. [2020-09-25 07:54:51,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 07:54:51,462 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 199 [2020-09-25 07:54:51,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:54:51,475 INFO L225 Difference]: With dead ends: 3692 [2020-09-25 07:54:51,475 INFO L226 Difference]: Without dead ends: 2238 [2020-09-25 07:54:51,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 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 07:54:51,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2020-09-25 07:54:51,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 2073. [2020-09-25 07:54:51,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2073 states. [2020-09-25 07:54:51,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 2481 transitions. [2020-09-25 07:54:51,578 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 2481 transitions. Word has length 199 [2020-09-25 07:54:51,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:54:51,578 INFO L479 AbstractCegarLoop]: Abstraction has 2073 states and 2481 transitions. [2020-09-25 07:54:51,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 07:54:51,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 2481 transitions. [2020-09-25 07:54:51,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-09-25 07:54:51,591 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:54:51,591 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-25 07:54:51,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 07:54:51,591 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:54:51,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:54:51,592 INFO L82 PathProgramCache]: Analyzing trace with hash 60157500, now seen corresponding path program 1 times [2020-09-25 07:54:51,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:54:51,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923777858] [2020-09-25 07:54:51,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:54:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:51,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:51,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:52,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:52,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:52,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:52,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:52,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:53,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:53,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:56,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:56,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-09-25 07:54:56,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 07:54:56,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-09-25 07:54:56,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:56,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:56,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:54:56,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 152 [2020-09-25 07:54:56,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-09-25 07:54:56,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:54:56,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:54:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:56,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:56,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:56,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 07:54:56,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:56,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 07:54:56,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:56,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:56,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:54:56,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:56,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:54:56,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:54:56,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 07:54:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:56,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:56,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:56,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 07:54:56,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:56,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 07:54:56,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:56,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:56,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:54:56,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:56,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:54:56,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 07:54:56,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-25 07:54:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:56,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:56,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:56,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 07:54:56,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:56,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 07:54:56,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:56,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:56,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:54:56,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:56,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:54:56,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:56,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-25 07:54:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:56,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:56,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:56,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-25 07:54:56,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:56,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-25 07:54:56,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:56,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:56,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:54:56,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:56,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-25 07:54:56,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:54:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 101 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-09-25 07:54:57,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923777858] [2020-09-25 07:54:57,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:54:57,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 07:54:57,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168308345] [2020-09-25 07:54:57,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 07:54:57,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:54:57,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 07:54:57,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 07:54:57,074 INFO L87 Difference]: Start difference. First operand 2073 states and 2481 transitions. Second operand 5 states.