/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 SequenceOfStatements --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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 09:57:31,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 09:57:31,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 09:57:31,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 09:57:31,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 09:57:31,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 09:57:31,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 09:57:31,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 09:57:31,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 09:57:31,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 09:57:31,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 09:57:31,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 09:57:31,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 09:57:31,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 09:57:31,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 09:57:31,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 09:57:31,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 09:57:31,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 09:57:31,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 09:57:31,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 09:57:31,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 09:57:31,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 09:57:31,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 09:57:31,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 09:57:31,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 09:57:31,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 09:57:31,563 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 09:57:31,566 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 09:57:31,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 09:57:31,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 09:57:31,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 09:57:31,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 09:57:31,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 09:57:31,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 09:57:31,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 09:57:31,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 09:57:31,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 09:57:31,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 09:57:31,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 09:57:31,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 09:57:31,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 09:57:31,588 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 [2020-10-13 09:57:31,630 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 09:57:31,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 09:57:31,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 09:57:31,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 09:57:31,633 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 09:57:31,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 09:57:31,634 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 09:57:31,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 09:57:31,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 09:57:31,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 09:57:31,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 09:57:31,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 09:57:31,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 09:57:31,637 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 09:57:31,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 09:57:31,637 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 09:57:31,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 09:57:31,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 09:57:31,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 09:57:31,638 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 09:57:31,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 09:57:31,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 09:57:31,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 09:57:31,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 09:57:31,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 09:57:31,639 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 09:57:31,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 09:57:31,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 09:57:31,640 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 09:57:31,640 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 -> SequenceOfStatements 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 09:57:31,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 09:57:31,944 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 09:57:31,947 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 09:57:31,948 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 09:57:31,949 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 09:57:31,949 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label05.c [2020-10-13 09:57:32,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b24bb2404/9ea109b587a34ff3a98b2cb595b9d9cc/FLAGca38df35b [2020-10-13 09:57:32,990 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 09:57:32,991 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label05.c [2020-10-13 09:57:33,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b24bb2404/9ea109b587a34ff3a98b2cb595b9d9cc/FLAGca38df35b [2020-10-13 09:57:33,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b24bb2404/9ea109b587a34ff3a98b2cb595b9d9cc [2020-10-13 09:57:33,375 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 09:57:33,378 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 09:57:33,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 09:57:33,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 09:57:33,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 09:57:33,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:57:33" (1/1) ... [2020-10-13 09:57:33,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697b2ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:33, skipping insertion in model container [2020-10-13 09:57:33,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:57:33" (1/1) ... [2020-10-13 09:57:33,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 09:57:33,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 09:57:35,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 09:57:35,919 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 09:57:37,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 09:57:37,781 INFO L208 MainTranslator]: Completed translation [2020-10-13 09:57:37,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:37 WrapperNode [2020-10-13 09:57:37,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 09:57:37,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 09:57:37,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 09:57:37,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 09:57:37,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:37" (1/1) ... [2020-10-13 09:57:37,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:37" (1/1) ... [2020-10-13 09:57:37,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:37" (1/1) ... [2020-10-13 09:57:37,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:37" (1/1) ... [2020-10-13 09:57:38,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:37" (1/1) ... [2020-10-13 09:57:38,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:37" (1/1) ... [2020-10-13 09:57:38,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:37" (1/1) ... [2020-10-13 09:57:38,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 09:57:38,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 09:57:38,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 09:57:38,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 09:57:38,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:37" (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 [2020-10-13 09:57:38,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 09:57:38,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 09:57:38,443 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 09:57:38,443 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 09:57:38,443 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 09:57:38,443 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 09:57:38,444 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-13 09:57:38,445 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-13 09:57:38,445 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 09:57:38,445 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 09:57:38,445 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 09:57:38,446 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 09:57:38,446 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 09:57:38,446 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-13 09:57:38,446 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-13 09:57:38,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 09:57:38,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 09:57:38,448 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 09:57:38,448 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 09:57:38,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 09:57:38,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 09:57:51,632 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 09:57:51,633 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 09:57:51,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:57:51 BoogieIcfgContainer [2020-10-13 09:57:51,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 09:57:51,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 09:57:51,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 09:57:51,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 09:57:51,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:57:33" (1/3) ... [2020-10-13 09:57:51,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@624827b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:57:51, skipping insertion in model container [2020-10-13 09:57:51,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:37" (2/3) ... [2020-10-13 09:57:51,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@624827b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:57:51, skipping insertion in model container [2020-10-13 09:57:51,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:57:51" (3/3) ... [2020-10-13 09:57:51,662 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label05.c [2020-10-13 09:57:51,673 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 09:57:51,683 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 09:57:51,699 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 09:57:51,734 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 09:57:51,735 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 09:57:51,735 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 09:57:51,735 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 09:57:51,735 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 09:57:51,735 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 09:57:51,736 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 09:57:51,736 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 09:57:51,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-13 09:57:51,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 09:57:51,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:57:51,803 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] [2020-10-13 09:57:51,803 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:57:51,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:57:51,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1248929806, now seen corresponding path program 1 times [2020-10-13 09:57:51,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:57:51,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306447408] [2020-10-13 09:57:51,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:57:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:57:52,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:57:52,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:57:52,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 09:57:52,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:57:52,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 536 [2020-10-13 09:57:52,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:57:52,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 09:57:52,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 09:57:52,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 09:57:52,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 09:57:52,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:57:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:57:52,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:57:52,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:57:52,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:57:52,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:57:52,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 09:57:52,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:57:52,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:57:52,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:57:52,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:57:52,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:57:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:57:52,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306447408] [2020-10-13 09:57:52,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 09:57:52,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 09:57:52,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534734954] [2020-10-13 09:57:52,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 09:57:52,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:57:52,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 09:57:52,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 09:57:52,799 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-13 09:58:20,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:58:20,507 INFO L93 Difference]: Finished difference Result 5038 states and 9462 transitions. [2020-10-13 09:58:20,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:58:20,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-13 09:58:20,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:58:20,555 INFO L225 Difference]: With dead ends: 5038 [2020-10-13 09:58:20,556 INFO L226 Difference]: Without dead ends: 3197 [2020-10-13 09:58:20,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:58:20,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2020-10-13 09:58:20,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 3192. [2020-10-13 09:58:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3192 states. [2020-10-13 09:58:20,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3192 states to 3192 states and 5230 transitions. [2020-10-13 09:58:20,800 INFO L78 Accepts]: Start accepts. Automaton has 3192 states and 5230 transitions. Word has length 66 [2020-10-13 09:58:20,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:58:20,801 INFO L479 AbstractCegarLoop]: Abstraction has 3192 states and 5230 transitions. [2020-10-13 09:58:20,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 09:58:20,802 INFO L276 IsEmpty]: Start isEmpty. Operand 3192 states and 5230 transitions. [2020-10-13 09:58:20,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-13 09:58:20,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:58:20,809 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 09:58:20,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 09:58:20,809 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:58:20,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:58:20,810 INFO L82 PathProgramCache]: Analyzing trace with hash -513834476, now seen corresponding path program 1 times [2020-10-13 09:58:20,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:58:20,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778964404] [2020-10-13 09:58:20,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:58:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:58:20,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:20,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:21,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:21,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:22,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:22,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:23,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:58:23,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 09:58:23,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 09:58:23,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2177 [2020-10-13 09:58:23,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:58:23,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:58:23,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 09:58:23,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:58:23,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 09:58:23,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:58:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:58:23,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:23,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:58:23,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:58:23,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:58:23,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 09:58:23,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:58:23,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:58:23,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:58:23,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:58:23,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:58:23,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:58:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:58:23,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:23,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:58:23,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 09:58:23,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:58:23,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-13 09:58:23,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:58:23,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:58:23,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 09:58:23,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:58:23,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:58:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:58:23,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778964404] [2020-10-13 09:58:23,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 09:58:23,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 09:58:23,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739891894] [2020-10-13 09:58:23,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:58:23,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:58:23,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:58:23,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:58:23,405 INFO L87 Difference]: Start difference. First operand 3192 states and 5230 transitions. Second operand 5 states. [2020-10-13 09:58:58,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:58:58,698 INFO L93 Difference]: Finished difference Result 9225 states and 15296 transitions. [2020-10-13 09:58:58,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:58:58,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2020-10-13 09:58:58,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:58:58,731 INFO L225 Difference]: With dead ends: 9225 [2020-10-13 09:58:58,731 INFO L226 Difference]: Without dead ends: 6039 [2020-10-13 09:58:58,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:58:58,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6039 states. [2020-10-13 09:58:58,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6039 to 6024. [2020-10-13 09:58:58,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6024 states. [2020-10-13 09:58:58,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6024 states to 6024 states and 8690 transitions. [2020-10-13 09:58:58,893 INFO L78 Accepts]: Start accepts. Automaton has 6024 states and 8690 transitions. Word has length 139 [2020-10-13 09:58:58,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:58:58,893 INFO L479 AbstractCegarLoop]: Abstraction has 6024 states and 8690 transitions. [2020-10-13 09:58:58,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:58:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 6024 states and 8690 transitions. [2020-10-13 09:58:58,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 09:58:58,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:58:58,898 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 09:58:58,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 09:58:58,898 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:58:58,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:58:58,899 INFO L82 PathProgramCache]: Analyzing trace with hash 435015165, now seen corresponding path program 1 times [2020-10-13 09:58:58,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:58:58,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952329947] [2020-10-13 09:58:58,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:58:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:58:58,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:59,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:59,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:59:01,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:59:01,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-13 09:59:01,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:59:01,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2519 [2020-10-13 09:59:01,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:59:01,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 09:59:01,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 09:59:01,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 09:59:01,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:59:01,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:59:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:59:01,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:59:01,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:59:01,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:59:01,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:59:01,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:59:01,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:59:01,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:59:01,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:59:01,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:59:01,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:59:01,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:59:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:59:01,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:59:02,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:59:02,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 09:59:02,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:59:02,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-13 09:59:02,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:59:02,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:59:02,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:59:02,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 09:59:02,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:59:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:59:02,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952329947] [2020-10-13 09:59:02,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:59:02,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 09:59:02,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134398363] [2020-10-13 09:59:02,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 09:59:02,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:59:02,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 09:59:02,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 09:59:02,159 INFO L87 Difference]: Start difference. First operand 6024 states and 8690 transitions. Second operand 8 states. [2020-10-13 09:59:03,756 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-10-13 09:59:03,966 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-13 09:59:04,128 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-13 09:59:58,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:59:58,968 INFO L93 Difference]: Finished difference Result 12306 states and 17681 transitions. [2020-10-13 09:59:58,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 09:59:58,981 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 147 [2020-10-13 09:59:58,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:59:59,012 INFO L225 Difference]: With dead ends: 12306 [2020-10-13 09:59:59,013 INFO L226 Difference]: Without dead ends: 6028 [2020-10-13 09:59:59,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-13 09:59:59,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6028 states. [2020-10-13 09:59:59,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6028 to 6024. [2020-10-13 09:59:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6024 states. [2020-10-13 09:59:59,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6024 states to 6024 states and 8672 transitions. [2020-10-13 09:59:59,229 INFO L78 Accepts]: Start accepts. Automaton has 6024 states and 8672 transitions. Word has length 147 [2020-10-13 09:59:59,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:59:59,230 INFO L479 AbstractCegarLoop]: Abstraction has 6024 states and 8672 transitions. [2020-10-13 09:59:59,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 09:59:59,230 INFO L276 IsEmpty]: Start isEmpty. Operand 6024 states and 8672 transitions. [2020-10-13 09:59:59,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-13 09:59:59,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:59:59,236 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 09:59:59,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 09:59:59,236 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:59:59,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:59:59,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1534632217, now seen corresponding path program 1 times [2020-10-13 09:59:59,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:59:59,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810995455] [2020-10-13 09:59:59,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:59:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:59:59,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:59:59,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:00,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:01,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:00:01,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-13 10:00:01,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:00:01,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2108 [2020-10-13 10:00:01,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:00:01,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:00:01,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-13 10:00:01,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:00:01,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:00:01,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:00:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:00:01,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:01,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:00:01,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:00:01,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:00:01,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:00:01,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:00:01,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:00:01,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:00:01,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:00:01,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:00:01,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:00:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:00:01,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:01,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:00:01,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 10:00:01,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:00:01,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-13 10:00:01,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:00:01,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:00:01,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:00:01,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 10:00:01,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:00:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:00:01,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810995455] [2020-10-13 10:00:01,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:00:01,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:00:01,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798218722] [2020-10-13 10:00:01,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:00:01,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:00:01,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:00:01,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:00:01,966 INFO L87 Difference]: Start difference. First operand 6024 states and 8672 transitions. Second operand 5 states. [2020-10-13 10:00:51,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:00:51,922 INFO L93 Difference]: Finished difference Result 12064 states and 17374 transitions. [2020-10-13 10:00:51,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:00:51,936 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 167 [2020-10-13 10:00:51,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:00:51,965 INFO L225 Difference]: With dead ends: 12064 [2020-10-13 10:00:51,965 INFO L226 Difference]: Without dead ends: 6028 [2020-10-13 10:00:51,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:00:51,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6028 states. [2020-10-13 10:00:52,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6028 to 6024. [2020-10-13 10:00:52,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6024 states. [2020-10-13 10:00:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6024 states to 6024 states and 8668 transitions. [2020-10-13 10:00:52,169 INFO L78 Accepts]: Start accepts. Automaton has 6024 states and 8668 transitions. Word has length 167 [2020-10-13 10:00:52,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:00:52,172 INFO L479 AbstractCegarLoop]: Abstraction has 6024 states and 8668 transitions. [2020-10-13 10:00:52,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:00:52,172 INFO L276 IsEmpty]: Start isEmpty. Operand 6024 states and 8668 transitions. [2020-10-13 10:00:52,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-13 10:00:52,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:00:52,175 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 10:00:52,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:00:52,176 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:00:52,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:00:52,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1034844657, now seen corresponding path program 1 times [2020-10-13 10:00:52,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:00:52,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829392980] [2020-10-13 10:00:52,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:00:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:00:52,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:52,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:53,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:00:53,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-13 10:00:53,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:00:53,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1214 [2020-10-13 10:00:53,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:00:53,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:00:53,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 114 [2020-10-13 10:00:53,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 10:00:53,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:00:53,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:00:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:00:53,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:53,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:00:53,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:00:53,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:00:53,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:00:53,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:00:53,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:00:53,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:00:53,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:00:53,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:00:53,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:00:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:00:53,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:53,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:00:53,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 10:00:53,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:00:53,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-13 10:00:53,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:00:53,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:00:53,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:00:53,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-13 10:00:53,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:00:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:00:53,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829392980] [2020-10-13 10:00:53,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:00:53,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:00:53,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350956299] [2020-10-13 10:00:53,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:00:53,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:00:53,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:00:53,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:00:53,869 INFO L87 Difference]: Start difference. First operand 6024 states and 8668 transitions. Second operand 5 states.