/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_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:05:56,731 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:05:56,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:05:56,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:05:56,782 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:05:56,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:05:56,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:05:56,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:05:56,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:05:56,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:05:56,803 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:05:56,804 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:05:56,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:05:56,808 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:05:56,810 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:05:56,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:05:56,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:05:56,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:05:56,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:05:56,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:05:56,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:05:56,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:05:56,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:05:56,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:05:56,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:05:56,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:05:56,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:05:56,826 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:05:56,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:05:56,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:05:56,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:05:56,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:05:56,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:05:56,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:05:56,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:05:56,831 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:05:56,832 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:05:56,832 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:05:56,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:05:56,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:05:56,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:05:56,835 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 10:05:56,860 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:05:56,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:05:56,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:05:56,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:05:56,862 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:05:56,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:05:56,863 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:05:56,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:05:56,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:05:56,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:05:56,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:05:56,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:05:56,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:05:56,864 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:05:56,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:05:56,865 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:05:56,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:05:56,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:05:56,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:05:56,866 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:05:56,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:05:56,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:05:56,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:05:56,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:05:56,867 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:05:56,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:05:56,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:05:56,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:05:56,868 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:05:56,868 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 10:05:57,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:05:57,187 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:05:57,190 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:05:57,192 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:05:57,193 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:05:57,193 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label33.c [2020-10-13 10:05:57,260 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98dbbe804/d3f7f047876b4e428cf67262df5f72bb/FLAGc955024a7 [2020-10-13 10:05:58,288 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:05:58,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label33.c [2020-10-13 10:05:58,353 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98dbbe804/d3f7f047876b4e428cf67262df5f72bb/FLAGc955024a7 [2020-10-13 10:05:58,646 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98dbbe804/d3f7f047876b4e428cf67262df5f72bb [2020-10-13 10:05:58,660 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:05:58,663 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:05:58,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:05:58,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:05:58,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:05:58,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:05:58" (1/1) ... [2020-10-13 10:05:58,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@424d9305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:05:58, skipping insertion in model container [2020-10-13 10:05:58,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:05:58" (1/1) ... [2020-10-13 10:05:58,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:05:58,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:06:01,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:06:01,384 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:06:02,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:06:02,491 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:06:02,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:06:02 WrapperNode [2020-10-13 10:06:02,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:06:02,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:06:02,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:06:02,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:06:02,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:06:02" (1/1) ... [2020-10-13 10:06:02,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:06:02" (1/1) ... [2020-10-13 10:06:02,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:06:02" (1/1) ... [2020-10-13 10:06:02,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:06:02" (1/1) ... [2020-10-13 10:06:02,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:06:02" (1/1) ... [2020-10-13 10:06:02,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:06:02" (1/1) ... [2020-10-13 10:06:02,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:06:02" (1/1) ... [2020-10-13 10:06:03,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:06:03,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:06:03,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:06:03,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:06:03,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:06:02" (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 10:06:03,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:06:03,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:06:03,311 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 10:06:03,311 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 10:06:03,312 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 10:06:03,312 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 10:06:03,312 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-13 10:06:03,314 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-13 10:06:03,314 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:06:03,315 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 10:06:03,315 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 10:06:03,315 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 10:06:03,315 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 10:06:03,316 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-13 10:06:03,316 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-13 10:06:03,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:06:03,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:06:03,319 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:06:03,319 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:06:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:06:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:06:16,364 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:06:16,364 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:06:16,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:06:16 BoogieIcfgContainer [2020-10-13 10:06:16,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:06:16,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:06:16,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:06:16,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:06:16,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:05:58" (1/3) ... [2020-10-13 10:06:16,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633e684a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:06:16, skipping insertion in model container [2020-10-13 10:06:16,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:06:02" (2/3) ... [2020-10-13 10:06:16,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633e684a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:06:16, skipping insertion in model container [2020-10-13 10:06:16,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:06:16" (3/3) ... [2020-10-13 10:06:16,392 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label33.c [2020-10-13 10:06:16,405 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:06:16,417 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:06:16,433 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:06:16,465 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:06:16,465 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:06:16,465 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:06:16,465 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:06:16,466 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:06:16,466 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:06:16,466 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:06:16,466 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:06:16,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-13 10:06:16,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 10:06:16,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:06:16,528 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] [2020-10-13 10:06:16,529 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:06:16,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:06:16,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1757729892, now seen corresponding path program 1 times [2020-10-13 10:06:16,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:06:16,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965774443] [2020-10-13 10:06:16,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:06:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:06:16,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:17,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:06:17,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 10:06:17,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:06:17,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 561 [2020-10-13 10:06:17,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:06:17,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:06:17,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:06:17,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 10:06:17,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-13 10:06:17,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:06:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:06:17,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:17,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:06:17,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:06:17,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:06:17,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 10:06:17,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:06:17,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:06:17,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:06:17,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:06:17,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:06:17,463 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 10:06:17,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965774443] [2020-10-13 10:06:17,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:06:17,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:06:17,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144557431] [2020-10-13 10:06:17,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:06:17,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:06:17,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:06:17,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:06:17,493 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-13 10:06:43,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:06:43,686 INFO L93 Difference]: Finished difference Result 5030 states and 9452 transitions. [2020-10-13 10:06:43,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:06:43,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-13 10:06:43,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:06:43,732 INFO L225 Difference]: With dead ends: 5030 [2020-10-13 10:06:43,732 INFO L226 Difference]: Without dead ends: 3189 [2020-10-13 10:06:43,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 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 10:06:43,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2020-10-13 10:06:43,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 3183. [2020-10-13 10:06:43,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3183 states. [2020-10-13 10:06:44,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 4964 transitions. [2020-10-13 10:06:44,017 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 4964 transitions. Word has length 47 [2020-10-13 10:06:44,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:06:44,018 INFO L479 AbstractCegarLoop]: Abstraction has 3183 states and 4964 transitions. [2020-10-13 10:06:44,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:06:44,019 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 4964 transitions. [2020-10-13 10:06:44,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 10:06:44,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:06:44,026 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:06:44,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:06:44,026 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:06:44,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:06:44,027 INFO L82 PathProgramCache]: Analyzing trace with hash -2073406109, now seen corresponding path program 1 times [2020-10-13 10:06:44,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:06:44,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343436832] [2020-10-13 10:06:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:06:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:06:44,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:44,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:44,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:45,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:46,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:46,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:46,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:06:46,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 10:06:46,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:06:46,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2553 [2020-10-13 10:06:46,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:06:46,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:06:46,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 10:06:46,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:06:46,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 10:06:46,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:06:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:06:46,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:46,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:06:46,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:06:46,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:06:46,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:06:46,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:06:46,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:06:46,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:06:46,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:06:46,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:06:46,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:06:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:06:46,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:46,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:06:46,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:06:46,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:06:46,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-13 10:06:46,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:06:46,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:06:46,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 10:06:46,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:06:46,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:06:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:06:47,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343436832] [2020-10-13 10:06:47,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:06:47,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:06:47,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476237574] [2020-10-13 10:06:47,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:06:47,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:06:47,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:06:47,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:06:47,031 INFO L87 Difference]: Start difference. First operand 3183 states and 4964 transitions. Second operand 5 states. [2020-10-13 10:07:24,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:07:24,445 INFO L93 Difference]: Finished difference Result 9216 states and 14510 transitions. [2020-10-13 10:07:24,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:07:24,451 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-10-13 10:07:24,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:07:24,479 INFO L225 Difference]: With dead ends: 9216 [2020-10-13 10:07:24,480 INFO L226 Difference]: Without dead ends: 6039 [2020-10-13 10:07:24,490 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 10:07:24,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6039 states. [2020-10-13 10:07:24,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6039 to 6023. [2020-10-13 10:07:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6023 states. [2020-10-13 10:07:24,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6023 states to 6023 states and 8356 transitions. [2020-10-13 10:07:24,663 INFO L78 Accepts]: Start accepts. Automaton has 6023 states and 8356 transitions. Word has length 120 [2020-10-13 10:07:24,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:07:24,666 INFO L479 AbstractCegarLoop]: Abstraction has 6023 states and 8356 transitions. [2020-10-13 10:07:24,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:07:24,666 INFO L276 IsEmpty]: Start isEmpty. Operand 6023 states and 8356 transitions. [2020-10-13 10:07:24,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 10:07:24,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:07:24,679 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:07:24,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:07:24,679 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:07:24,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:07:24,680 INFO L82 PathProgramCache]: Analyzing trace with hash -145133407, now seen corresponding path program 1 times [2020-10-13 10:07:24,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:07:24,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175557864] [2020-10-13 10:07:24,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:07:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:07:24,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:25,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:25,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:25,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:25,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:07:25,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 10:07:25,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:07:25,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1068 [2020-10-13 10:07:25,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:07:25,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:07:25,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-13 10:07:25,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 10:07:25,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:07:25,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:07:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:07:25,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:25,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:07:25,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:07:25,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:07:25,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:07:25,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:07:25,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:07:25,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:07:25,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:07:25,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:07:25,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:07:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:07:25,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:26,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:07:26,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:07:26,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:07:26,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-13 10:07:26,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:07:26,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:07:26,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:07:26,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 10:07:26,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:07:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:07:26,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175557864] [2020-10-13 10:07:26,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:07:26,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:07:26,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550622222] [2020-10-13 10:07:26,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:07:26,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:07:26,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:07:26,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:07:26,099 INFO L87 Difference]: Start difference. First operand 6023 states and 8356 transitions. Second operand 5 states. [2020-10-13 10:08:09,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:08:09,951 INFO L93 Difference]: Finished difference Result 14870 states and 21397 transitions. [2020-10-13 10:08:09,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:08:09,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-10-13 10:08:09,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:08:10,013 INFO L225 Difference]: With dead ends: 14870 [2020-10-13 10:08:10,013 INFO L226 Difference]: Without dead ends: 8853 [2020-10-13 10:08:10,030 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 [2020-10-13 10:08:10,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8853 states. [2020-10-13 10:08:10,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8853 to 8844. [2020-10-13 10:08:10,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8844 states. [2020-10-13 10:08:10,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8844 states to 8844 states and 11620 transitions. [2020-10-13 10:08:10,301 INFO L78 Accepts]: Start accepts. Automaton has 8844 states and 11620 transitions. Word has length 120 [2020-10-13 10:08:10,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:08:10,311 INFO L479 AbstractCegarLoop]: Abstraction has 8844 states and 11620 transitions. [2020-10-13 10:08:10,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:08:10,311 INFO L276 IsEmpty]: Start isEmpty. Operand 8844 states and 11620 transitions. [2020-10-13 10:08:10,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 10:08:10,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:08:10,317 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:08:10,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:08:10,320 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:08:10,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:08:10,320 INFO L82 PathProgramCache]: Analyzing trace with hash -412772582, now seen corresponding path program 1 times [2020-10-13 10:08:10,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:08:10,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577895243] [2020-10-13 10:08:10,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:08:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:08:10,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:10,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:11,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:08:11,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-13 10:08:11,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:08:11,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 889 [2020-10-13 10:08:11,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:08:11,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:08:11,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 10:08:11,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 10:08:11,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:08:11,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:08:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:08:11,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:11,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:08:11,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:08:11,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:08:11,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:08:11,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:08:11,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:08:11,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:08:11,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:08:11,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:08:11,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:08:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:08:11,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:11,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:08:11,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 10:08:11,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:08:11,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-13 10:08:11,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:08:11,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:08:11,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:08:11,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 10:08:11,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:08:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:08:11,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577895243] [2020-10-13 10:08:11,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:08:11,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:08:11,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278055922] [2020-10-13 10:08:11,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:08:11,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:08:11,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:08:11,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:08:11,586 INFO L87 Difference]: Start difference. First operand 8844 states and 11620 transitions. Second operand 5 states. [2020-10-13 10:09:02,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:09:02,629 INFO L93 Difference]: Finished difference Result 20528 states and 28015 transitions. [2020-10-13 10:09:02,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:09:02,638 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-10-13 10:09:02,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:09:02,696 INFO L225 Difference]: With dead ends: 20528 [2020-10-13 10:09:02,696 INFO L226 Difference]: Without dead ends: 11690 [2020-10-13 10:09:02,717 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 [2020-10-13 10:09:02,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11690 states. [2020-10-13 10:09:03,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11690 to 11683. [2020-10-13 10:09:03,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11683 states. [2020-10-13 10:09:03,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11683 states to 11683 states and 14948 transitions. [2020-10-13 10:09:03,066 INFO L78 Accepts]: Start accepts. Automaton has 11683 states and 14948 transitions. Word has length 128 [2020-10-13 10:09:03,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:09:03,069 INFO L479 AbstractCegarLoop]: Abstraction has 11683 states and 14948 transitions. [2020-10-13 10:09:03,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:09:03,073 INFO L276 IsEmpty]: Start isEmpty. Operand 11683 states and 14948 transitions. [2020-10-13 10:09:03,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-13 10:09:03,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:09:03,080 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:09:03,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:09:03,081 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:09:03,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:09:03,081 INFO L82 PathProgramCache]: Analyzing trace with hash -2145352826, now seen corresponding path program 1 times [2020-10-13 10:09:03,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:09:03,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331307049] [2020-10-13 10:09:03,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:09:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:09:03,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:03,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:03,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:05,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:09:05,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-13 10:09:05,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:09:05,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2551 [2020-10-13 10:09:05,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:09:05,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:09:05,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 130 [2020-10-13 10:09:05,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 10:09:05,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:09:06,321 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 29 [2020-10-13 10:09:06,654 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 29 [2020-10-13 10:09:06,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:09:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:09:06,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:06,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:09:06,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:09:06,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:09:06,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 10:09:06,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:09:06,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:09:06,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:09:06,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:09:06,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:09:06,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:09:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:09:06,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:07,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:09:07,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 10:09:07,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:09:07,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-13 10:09:07,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:09:07,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:09:07,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:09:07,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-13 10:09:07,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:09:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:09:07,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331307049] [2020-10-13 10:09:07,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:09:07,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:09:07,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939166793] [2020-10-13 10:09:07,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:09:07,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:09:07,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:09:07,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:09:07,168 INFO L87 Difference]: Start difference. First operand 11683 states and 14948 transitions. Second operand 7 states. [2020-10-13 10:09:09,507 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-13 10:09:09,806 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-13 10:09:10,405 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-13 10:09:20,377 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 52