/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/Problem17_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 22:31:27,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 22:31:27,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 22:31:27,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 22:31:27,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 22:31:27,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 22:31:27,172 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 22:31:27,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 22:31:27,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 22:31:27,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 22:31:27,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 22:31:27,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 22:31:27,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 22:31:27,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 22:31:27,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 22:31:27,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 22:31:27,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 22:31:27,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 22:31:27,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 22:31:27,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 22:31:27,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 22:31:27,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 22:31:27,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 22:31:27,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 22:31:27,228 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 22:31:27,228 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 22:31:27,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 22:31:27,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 22:31:27,230 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 22:31:27,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 22:31:27,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 22:31:27,233 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 22:31:27,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 22:31:27,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 22:31:27,236 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 22:31:27,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 22:31:27,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 22:31:27,239 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 22:31:27,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 22:31:27,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 22:31:27,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 22:31:27,243 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 [2020-10-14 22:31:27,286 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 22:31:27,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 22:31:27,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 22:31:27,290 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 22:31:27,290 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 22:31:27,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 22:31:27,291 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 22:31:27,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 22:31:27,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 22:31:27,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 22:31:27,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 22:31:27,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 22:31:27,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 22:31:27,294 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 22:31:27,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 22:31:27,294 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 22:31:27,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 22:31:27,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 22:31:27,295 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 22:31:27,295 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 22:31:27,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 22:31:27,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 22:31:27,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 22:31:27,296 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 22:31:27,296 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 22:31:27,296 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 22:31:27,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 22:31:27,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 22:31:27,296 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 22:31:27,297 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 22:31:27,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 22:31:27,681 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 22:31:27,686 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 22:31:27,689 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 22:31:27,690 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 22:31:27,691 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label31.c [2020-10-14 22:31:27,782 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9165522a4/df92834c35c34b6588867da03afa7e94/FLAGde292e223 [2020-10-14 22:31:28,589 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 22:31:28,590 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label31.c [2020-10-14 22:31:28,619 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9165522a4/df92834c35c34b6588867da03afa7e94/FLAGde292e223 [2020-10-14 22:31:28,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9165522a4/df92834c35c34b6588867da03afa7e94 [2020-10-14 22:31:28,674 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 22:31:28,676 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 22:31:28,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 22:31:28,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 22:31:28,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 22:31:28,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:31:28" (1/1) ... [2020-10-14 22:31:28,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22f0616b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:31:28, skipping insertion in model container [2020-10-14 22:31:28,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:31:28" (1/1) ... [2020-10-14 22:31:28,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 22:31:28,828 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 22:31:30,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 22:31:30,439 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 22:31:31,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 22:31:31,069 INFO L208 MainTranslator]: Completed translation [2020-10-14 22:31:31,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:31:31 WrapperNode [2020-10-14 22:31:31,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 22:31:31,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 22:31:31,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 22:31:31,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 22:31:31,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:31:31" (1/1) ... [2020-10-14 22:31:31,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:31:31" (1/1) ... [2020-10-14 22:31:31,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:31:31" (1/1) ... [2020-10-14 22:31:31,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:31:31" (1/1) ... [2020-10-14 22:31:31,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:31:31" (1/1) ... [2020-10-14 22:31:31,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:31:31" (1/1) ... [2020-10-14 22:31:31,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:31:31" (1/1) ... [2020-10-14 22:31:31,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 22:31:31,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 22:31:31,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 22:31:31,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 22:31:31,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:31:31" (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 [2020-10-14 22:31:31,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 22:31:31,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 22:31:31,446 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-14 22:31:31,446 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-14 22:31:31,446 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 22:31:31,446 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-14 22:31:31,446 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-14 22:31:31,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 22:31:31,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 22:31:31,447 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 22:31:31,447 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 22:31:31,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 22:31:31,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 22:31:40,739 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 22:31:40,740 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 22:31:40,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:31:40 BoogieIcfgContainer [2020-10-14 22:31:40,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 22:31:40,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 22:31:40,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 22:31:40,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 22:31:40,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:31:28" (1/3) ... [2020-10-14 22:31:40,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7d1e37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:31:40, skipping insertion in model container [2020-10-14 22:31:40,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:31:31" (2/3) ... [2020-10-14 22:31:40,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7d1e37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:31:40, skipping insertion in model container [2020-10-14 22:31:40,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:31:40" (3/3) ... [2020-10-14 22:31:40,774 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label31.c [2020-10-14 22:31:40,786 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 22:31:40,800 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 22:31:40,820 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 22:31:40,861 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 22:31:40,861 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 22:31:40,861 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 22:31:40,861 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 22:31:40,862 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 22:31:40,862 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 22:31:40,862 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 22:31:40,862 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 22:31:40,909 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2020-10-14 22:31:40,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 22:31:40,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 22:31:40,920 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 22:31:40,920 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 22:31:40,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 22:31:40,929 INFO L82 PathProgramCache]: Analyzing trace with hash -46686471, now seen corresponding path program 1 times [2020-10-14 22:31:40,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 22:31:40,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742995637] [2020-10-14 22:31:40,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 22:31:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:31:41,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:31:41,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:31:41,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 22:31:41,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:31:41,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-14 22:31:41,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:31:41,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:31:41,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 22:31:41,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 22:31:41,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 22:31:41,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 22:31:41,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 22:31:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:31:41,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:31:41,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:31:41,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 22:31:41,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:31:41,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-14 22:31:41,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:31:41,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:31:41,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 22:31:41,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 22:31:41,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 22:31:41,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:31:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 22:31:41,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742995637] [2020-10-14 22:31:41,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 22:31:41,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 22:31:41,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574136942] [2020-10-14 22:31:41,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 22:31:41,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 22:31:41,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 22:31:41,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 22:31:41,704 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2020-10-14 22:31:51,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 22:31:51,900 INFO L93 Difference]: Finished difference Result 1689 states and 3086 transitions. [2020-10-14 22:31:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 22:31:51,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-14 22:31:51,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 22:31:51,929 INFO L225 Difference]: With dead ends: 1689 [2020-10-14 22:31:51,929 INFO L226 Difference]: Without dead ends: 1009 [2020-10-14 22:31:51,942 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 [2020-10-14 22:31:51,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2020-10-14 22:31:52,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 991. [2020-10-14 22:31:52,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 991 states. [2020-10-14 22:31:52,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1526 transitions. [2020-10-14 22:31:52,062 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1526 transitions. Word has length 14 [2020-10-14 22:31:52,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 22:31:52,063 INFO L479 AbstractCegarLoop]: Abstraction has 991 states and 1526 transitions. [2020-10-14 22:31:52,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 22:31:52,064 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1526 transitions. [2020-10-14 22:31:52,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-14 22:31:52,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 22:31:52,069 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 22:31:52,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 22:31:52,069 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 22:31:52,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 22:31:52,070 INFO L82 PathProgramCache]: Analyzing trace with hash -668197308, now seen corresponding path program 1 times [2020-10-14 22:31:52,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 22:31:52,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435413765] [2020-10-14 22:31:52,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 22:31:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:31:52,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:31:52,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:31:52,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:31:53,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:31:53,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-14 22:31:53,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 22:31:53,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1367 [2020-10-14 22:31:53,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:31:53,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:31:53,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 22:31:53,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 22:31:53,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-14 22:31:53,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 22:31:53,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 22:31:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:31:53,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:31:53,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:31:53,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 22:31:53,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:31:53,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 22:31:53,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:31:53,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:31:53,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 22:31:53,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 22:31:53,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 22:31:53,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:31:53,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 22:31:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:31:53,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:31:53,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:31:53,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 22:31:53,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:31:53,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-14 22:31:53,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:31:53,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:31:53,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 22:31:53,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 22:31:53,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 22:31:53,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:31:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 22:31:53,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435413765] [2020-10-14 22:31:53,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 22:31:53,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 22:31:53,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265678986] [2020-10-14 22:31:53,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 22:31:53,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 22:31:53,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 22:31:53,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 22:31:53,929 INFO L87 Difference]: Start difference. First operand 991 states and 1526 transitions. Second operand 7 states. [2020-10-14 22:32:06,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 22:32:06,872 INFO L93 Difference]: Finished difference Result 2464 states and 3911 transitions. [2020-10-14 22:32:06,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 22:32:06,874 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 85 [2020-10-14 22:32:06,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 22:32:06,883 INFO L225 Difference]: With dead ends: 2464 [2020-10-14 22:32:06,883 INFO L226 Difference]: Without dead ends: 1479 [2020-10-14 22:32:06,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-14 22:32:06,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2020-10-14 22:32:06,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1441. [2020-10-14 22:32:06,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1441 states. [2020-10-14 22:32:06,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 1870 transitions. [2020-10-14 22:32:06,941 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 1870 transitions. Word has length 85 [2020-10-14 22:32:06,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 22:32:06,942 INFO L479 AbstractCegarLoop]: Abstraction has 1441 states and 1870 transitions. [2020-10-14 22:32:06,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 22:32:06,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 1870 transitions. [2020-10-14 22:32:06,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 22:32:06,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 22:32:06,945 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 22:32:06,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 22:32:06,946 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 22:32:06,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 22:32:06,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1839741392, now seen corresponding path program 1 times [2020-10-14 22:32:06,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 22:32:06,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092568567] [2020-10-14 22:32:06,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 22:32:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:32:07,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:32:07,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:32:07,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 22:32:07,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:32:07,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-10-14 22:32:07,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:32:07,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:32:07,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 22:32:07,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 22:32:07,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-14 22:32:07,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:32:07,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 22:32:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:32:07,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:32:07,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:32:07,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 22:32:07,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:32:07,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 22:32:07,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:32:07,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:32:07,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 22:32:07,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 22:32:07,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 22:32:07,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 22:32:07,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 22:32:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:32:07,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:32:08,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:32:08,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 22:32:08,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:32:08,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-14 22:32:08,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:32:08,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:32:08,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 22:32:08,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 22:32:08,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-14 22:32:08,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:32:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 22:32:08,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092568567] [2020-10-14 22:32:08,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 22:32:08,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 22:32:08,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638932724] [2020-10-14 22:32:08,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 22:32:08,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 22:32:08,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 22:32:08,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 22:32:08,166 INFO L87 Difference]: Start difference. First operand 1441 states and 1870 transitions. Second operand 8 states. [2020-10-14 22:32:29,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 22:32:29,630 INFO L93 Difference]: Finished difference Result 4359 states and 6049 transitions. [2020-10-14 22:32:29,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 22:32:29,632 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 88 [2020-10-14 22:32:29,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 22:32:29,655 INFO L225 Difference]: With dead ends: 4359 [2020-10-14 22:32:29,656 INFO L226 Difference]: Without dead ends: 2896 [2020-10-14 22:32:29,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-14 22:32:29,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2896 states. [2020-10-14 22:32:29,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2896 to 2831. [2020-10-14 22:32:29,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2831 states. [2020-10-14 22:32:29,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2831 states to 2831 states and 3694 transitions. [2020-10-14 22:32:29,755 INFO L78 Accepts]: Start accepts. Automaton has 2831 states and 3694 transitions. Word has length 88 [2020-10-14 22:32:29,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 22:32:29,756 INFO L479 AbstractCegarLoop]: Abstraction has 2831 states and 3694 transitions. [2020-10-14 22:32:29,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 22:32:29,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2831 states and 3694 transitions. [2020-10-14 22:32:29,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-14 22:32:29,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 22:32:29,761 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-14 22:32:29,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 22:32:29,762 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 22:32:29,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 22:32:29,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1563313667, now seen corresponding path program 1 times [2020-10-14 22:32:29,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 22:32:29,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311800275] [2020-10-14 22:32:29,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 22:32:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:32:29,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:32:30,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:32:31,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:32:31,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-14 22:32:31,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 22:32:31,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1522 [2020-10-14 22:32:31,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:32:31,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:32:31,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 22:32:31,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-14 22:32:31,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 22:32:31,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-14 22:32:31,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 22:32:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:32:31,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:32:31,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:32:31,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 22:32:31,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:32:31,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 22:32:31,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:32:31,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:32:31,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 22:32:31,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 22:32:31,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 22:32:31,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:32:31,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 22:32:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:32:31,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:32:31,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:32:31,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 22:32:31,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:32:31,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-14 22:32:31,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:32:31,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:32:31,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 22:32:31,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 22:32:31,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 22:32:31,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:32:31,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-14 22:32:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:32:31,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:32:31,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:32:31,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 22:32:31,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:32:31,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-14 22:32:31,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:32:31,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:32:31,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 22:32:31,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 22:32:31,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 22:32:31,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:32:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 22:32:32,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311800275] [2020-10-14 22:32:32,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 22:32:32,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 22:32:32,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325290688] [2020-10-14 22:32:32,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 22:32:32,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 22:32:32,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 22:32:32,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 22:32:32,097 INFO L87 Difference]: Start difference. First operand 2831 states and 3694 transitions. Second operand 8 states. [2020-10-14 22:32:45,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 22:32:45,830 INFO L93 Difference]: Finished difference Result 7073 states and 9733 transitions. [2020-10-14 22:32:45,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 22:32:45,832 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 170 [2020-10-14 22:32:45,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 22:32:45,857 INFO L225 Difference]: With dead ends: 7073 [2020-10-14 22:32:45,858 INFO L226 Difference]: Without dead ends: 4681 [2020-10-14 22:32:45,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-14 22:32:45,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4681 states. [2020-10-14 22:32:45,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4681 to 4219. [2020-10-14 22:32:45,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4219 states. [2020-10-14 22:32:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4219 states to 4219 states and 5570 transitions. [2020-10-14 22:32:45,994 INFO L78 Accepts]: Start accepts. Automaton has 4219 states and 5570 transitions. Word has length 170 [2020-10-14 22:32:45,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 22:32:45,997 INFO L479 AbstractCegarLoop]: Abstraction has 4219 states and 5570 transitions. [2020-10-14 22:32:45,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 22:32:45,997 INFO L276 IsEmpty]: Start isEmpty. Operand 4219 states and 5570 transitions. [2020-10-14 22:32:46,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-14 22:32:46,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 22:32:46,007 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-14 22:32:46,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 22:32:46,008 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 22:32:46,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 22:32:46,008 INFO L82 PathProgramCache]: Analyzing trace with hash 2012973404, now seen corresponding path program 1 times [2020-10-14 22:32:46,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 22:32:46,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805274057] [2020-10-14 22:32:46,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 22:32:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:32:46,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:32:46,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:32:49,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:32:51,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:32:51,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-14 22:32:51,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 22:32:51,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 22:32:51,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:32:51,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:32:51,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 22:32:51,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-14 22:32:51,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-14 22:32:51,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:32:51,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 22:32:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:32:51,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:32:51,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:32:51,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 22:32:51,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:32:51,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 22:32:51,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:32:51,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:32:51,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 22:32:51,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 22:32:51,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 22:32:51,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-14 22:32:51,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 22:32:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:32:51,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:32:51,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:32:51,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 22:32:51,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:32:51,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-14 22:32:51,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:32:51,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:32:51,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 22:32:51,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 22:32:51,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 22:32:51,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 22:32:51,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-14 22:32:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:32:51,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:32:51,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:32:51,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:32:51,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 22:32:51,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 22:32:51,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-14 22:32:51,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:32:51,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:32:51,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 22:32:51,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 22:32:51,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-14 22:32:51,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 22:32:51,738 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-14 22:32:51,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805274057] [2020-10-14 22:32:51,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 22:32:51,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 22:32:51,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815848448] [2020-10-14 22:32:51,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 22:32:51,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 22:32:51,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 22:32:51,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 22:32:51,742 INFO L87 Difference]: Start difference. First operand 4219 states and 5570 transitions. Second operand 5 states. [2020-10-14 22:33:04,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 22:33:04,371 INFO L93 Difference]: Finished difference Result 8010 states and 10711 transitions. [2020-10-14 22:33:04,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 22:33:04,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 187 [2020-10-14 22:33:04,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 22:33:04,411 INFO L225 Difference]: With dead ends: 8010 [2020-10-14 22:33:04,411 INFO L226 Difference]: Without dead ends: 4230 [2020-10-14 22:33:04,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 22:33:04,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2020-10-14 22:33:04,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 4219. [2020-10-14 22:33:04,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4219 states. [2020-10-14 22:33:04,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4219 states to 4219 states and 5548 transitions. [2020-10-14 22:33:04,581 INFO L78 Accepts]: Start accepts. Automaton has 4219 states and 5548 transitions. Word has length 187 [2020-10-14 22:33:04,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 22:33:04,582 INFO L479 AbstractCegarLoop]: Abstraction has 4219 states and 5548 transitions. [2020-10-14 22:33:04,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 22:33:04,582 INFO L276 IsEmpty]: Start isEmpty. Operand 4219 states and 5548 transitions. [2020-10-14 22:33:04,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-14 22:33:04,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 22:33:04,587 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 22:33:04,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 22:33:04,588 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 22:33:04,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 22:33:04,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1874794879, now seen corresponding path program 1 times [2020-10-14 22:33:04,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 22:33:04,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435558320] [2020-10-14 22:33:04,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 22:33:04,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:33:04,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:33:05,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:33:06,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:33:06,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:33:07,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:33:07,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 272 [2020-10-14 22:33:07,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 22:33:07,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2983 [2020-10-14 22:33:07,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:33:07,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:33:07,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 22:33:07,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 22:33:07,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 266 [2020-10-14 22:33:07,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:33:07,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 22:33:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:33:07,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:33:07,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:33:07,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 22:33:07,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:33:07,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 22:33:07,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:33:07,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:33:07,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 22:33:07,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 22:33:07,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 22:33:07,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 22:33:07,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 22:33:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:33:07,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:33:08,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:33:08,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 22:33:08,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:33:08,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-14 22:33:08,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:33:08,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:33:08,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 22:33:08,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 22:33:08,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 22:33:08,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:33:08,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-14 22:33:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:33:08,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:33:08,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:33:08,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 22:33:08,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:33:08,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-14 22:33:08,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:33:08,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:33:08,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 22:33:08,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 22:33:08,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-14 22:33:08,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:33:08,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-14 22:33:08,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:33:08,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:33:08,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:33:08,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 22:33:08,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:33:08,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-14 22:33:08,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:33:08,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:33:08,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 22:33:08,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 22:33:08,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 22:33:08,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:33:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 130 proven. 25 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-10-14 22:33:08,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435558320] [2020-10-14 22:33:08,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 22:33:08,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 22:33:08,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743234097] [2020-10-14 22:33:08,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 22:33:08,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 22:33:08,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 22:33:08,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 22:33:08,615 INFO L87 Difference]: Start difference. First operand 4219 states and 5548 transitions. Second operand 9 states. [2020-10-14 22:33:39,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 22:33:39,804 INFO L93 Difference]: Finished difference Result 10893 states and 15295 transitions. [2020-10-14 22:33:39,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 22:33:39,807 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 258 [2020-10-14 22:33:39,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 22:33:39,850 INFO L225 Difference]: With dead ends: 10893 [2020-10-14 22:33:39,850 INFO L226 Difference]: Without dead ends: 6662 [2020-10-14 22:33:39,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-14 22:33:39,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2020-10-14 22:33:40,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 5122. [2020-10-14 22:33:40,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5122 states. [2020-10-14 22:33:40,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5122 states to 5122 states and 6597 transitions. [2020-10-14 22:33:40,097 INFO L78 Accepts]: Start accepts. Automaton has 5122 states and 6597 transitions. Word has length 258 [2020-10-14 22:33:40,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 22:33:40,097 INFO L479 AbstractCegarLoop]: Abstraction has 5122 states and 6597 transitions. [2020-10-14 22:33:40,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 22:33:40,098 INFO L276 IsEmpty]: Start isEmpty. Operand 5122 states and 6597 transitions. [2020-10-14 22:33:40,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-10-14 22:33:40,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 22:33:40,105 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 22:33:40,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 22:33:40,106 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 22:33:40,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 22:33:40,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1277643816, now seen corresponding path program 1 times [2020-10-14 22:33:40,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 22:33:40,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631311152] [2020-10-14 22:33:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 22:33:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:33:40,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:33:40,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:33:40,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:33:43,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:33:43,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:33:43,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-10-14 22:33:43,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 22:33:43,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3750 [2020-10-14 22:33:43,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:33:43,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:33:43,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 22:33:43,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-14 22:33:43,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-14 22:33:43,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:33:44,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 22:33:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:33:44,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:33:44,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:33:44,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 22:33:44,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:33:44,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 22:33:44,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:33:44,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:33:44,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 22:33:44,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 22:33:44,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 22:33:44,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:33:44,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 22:33:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:33:44,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:33:44,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:33:44,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 22:33:44,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:33:44,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-14 22:33:44,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:33:44,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:33:44,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 22:33:44,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 22:33:44,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 22:33:44,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:33:44,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-14 22:33:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:33:44,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:33:44,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:33:44,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-14 22:33:44,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:33:44,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-14 22:33:44,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:33:44,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:33:44,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 22:33:44,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 22:33:44,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-14 22:33:44,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:33:44,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-10-14 22:33:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:33:44,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:33:44,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:33:44,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 22:33:44,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:33:44,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-14 22:33:44,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:33:44,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:33:44,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 22:33:44,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-14 22:33:44,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 22:33:44,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:33:44,704 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 109 proven. 70 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-14 22:33:44,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631311152] [2020-10-14 22:33:44,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 22:33:44,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 22:33:44,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581380602] [2020-10-14 22:33:44,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 22:33:44,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 22:33:44,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 22:33:44,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 22:33:44,708 INFO L87 Difference]: Start difference. First operand 5122 states and 6597 transitions. Second operand 7 states. [2020-10-14 22:34:09,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 22:34:09,299 INFO L93 Difference]: Finished difference Result 14577 states and 19526 transitions. [2020-10-14 22:34:09,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 22:34:09,306 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 274 [2020-10-14 22:34:09,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 22:34:09,347 INFO L225 Difference]: With dead ends: 14577 [2020-10-14 22:34:09,347 INFO L226 Difference]: Without dead ends: 9896 [2020-10-14 22:34:09,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-14 22:34:09,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9896 states. [2020-10-14 22:34:09,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9896 to 9333. [2020-10-14 22:34:09,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9333 states. [2020-10-14 22:34:09,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9333 states to 9333 states and 11663 transitions. [2020-10-14 22:34:09,586 INFO L78 Accepts]: Start accepts. Automaton has 9333 states and 11663 transitions. Word has length 274 [2020-10-14 22:34:09,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 22:34:09,587 INFO L479 AbstractCegarLoop]: Abstraction has 9333 states and 11663 transitions. [2020-10-14 22:34:09,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 22:34:09,587 INFO L276 IsEmpty]: Start isEmpty. Operand 9333 states and 11663 transitions. [2020-10-14 22:34:09,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-14 22:34:09,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 22:34:09,594 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 22:34:09,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 22:34:09,595 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 22:34:09,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 22:34:09,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2113514519, now seen corresponding path program 1 times [2020-10-14 22:34:09,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 22:34:09,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471571194] [2020-10-14 22:34:09,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 22:34:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:34:09,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:34:09,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:34:11,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:34:14,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:34:14,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 295 [2020-10-14 22:34:14,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 22:34:14,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4689 [2020-10-14 22:34:14,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:34:14,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:34:14,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 22:34:14,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-14 22:34:14,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-14 22:34:14,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:34:14,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 22:34:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:34:14,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:34:14,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:34:14,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 22:34:14,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:34:14,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 22:34:14,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:34:14,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:34:14,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 22:34:14,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 22:34:14,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 22:34:14,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:34:14,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 22:34:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:34:14,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:34:14,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:34:14,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 22:34:14,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:34:14,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-14 22:34:14,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:34:14,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:34:14,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 22:34:14,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 22:34:14,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 22:34:14,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:34:14,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-14 22:34:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:34:14,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:34:15,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:34:15,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-14 22:34:15,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:34:15,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-14 22:34:15,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:34:15,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:34:15,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 22:34:15,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 22:34:15,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-14 22:34:15,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:34:15,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-14 22:34:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:34:15,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:34:15,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:34:15,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 22:34:15,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:34:15,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-14 22:34:15,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:34:15,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:34:15,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 22:34:15,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-14 22:34:15,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 22:34:15,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:34:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 109 proven. 70 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-14 22:34:15,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471571194] [2020-10-14 22:34:15,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 22:34:15,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 22:34:15,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889833957] [2020-10-14 22:34:15,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 22:34:15,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 22:34:15,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 22:34:15,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 22:34:15,660 INFO L87 Difference]: Start difference. First operand 9333 states and 11663 transitions. Second operand 7 states. [2020-10-14 22:34:37,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 22:34:37,076 INFO L93 Difference]: Finished difference Result 20649 states and 25758 transitions. [2020-10-14 22:34:37,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 22:34:37,080 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 281 [2020-10-14 22:34:37,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 22:34:37,141 INFO L225 Difference]: With dead ends: 20649 [2020-10-14 22:34:37,142 INFO L226 Difference]: Without dead ends: 11757 [2020-10-14 22:34:37,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-14 22:34:37,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11757 states. [2020-10-14 22:34:37,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11757 to 11121. [2020-10-14 22:34:37,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11121 states. [2020-10-14 22:34:37,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11121 states to 11121 states and 13715 transitions. [2020-10-14 22:34:37,481 INFO L78 Accepts]: Start accepts. Automaton has 11121 states and 13715 transitions. Word has length 281 [2020-10-14 22:34:37,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 22:34:37,482 INFO L479 AbstractCegarLoop]: Abstraction has 11121 states and 13715 transitions. [2020-10-14 22:34:37,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 22:34:37,482 INFO L276 IsEmpty]: Start isEmpty. Operand 11121 states and 13715 transitions. [2020-10-14 22:34:37,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-14 22:34:37,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 22:34:37,490 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 22:34:37,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 22:34:37,492 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 22:34:37,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 22:34:37,493 INFO L82 PathProgramCache]: Analyzing trace with hash 96677303, now seen corresponding path program 1 times [2020-10-14 22:34:37,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 22:34:37,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088548932] [2020-10-14 22:34:37,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 22:34:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:34:37,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:34:37,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:34:38,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:34:42,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:34:42,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 319 [2020-10-14 22:34:42,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 22:34:42,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-14 22:34:42,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:34:42,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:34:42,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 22:34:42,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 22:34:42,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 224 [2020-10-14 22:34:42,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:34:42,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 22:34:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:34:42,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:34:42,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:34:42,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 22:34:42,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:34:42,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 22:34:42,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:34:42,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:34:42,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 22:34:42,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 22:34:42,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 22:34:42,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:34:42,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 22:34:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:34:42,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:34:43,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:34:43,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 22:34:43,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:34:43,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-14 22:34:43,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:34:43,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:34:43,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 22:34:43,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 22:34:43,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 22:34:43,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 22:34:43,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-14 22:34:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:34:43,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:34:43,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:34:43,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 22:34:43,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:34:43,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-14 22:34:43,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:34:43,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:34:43,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 22:34:43,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 22:34:43,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-14 22:34:43,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:34:43,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2020-10-14 22:34:43,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:34:43,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:34:43,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:34:43,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 22:34:43,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:34:43,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-14 22:34:43,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:34:43,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:34:43,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 22:34:43,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-14 22:34:43,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 22:34:43,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:34:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 106 proven. 145 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 22:34:44,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088548932] [2020-10-14 22:34:44,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 22:34:44,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 22:34:44,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482159020] [2020-10-14 22:34:44,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 22:34:44,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 22:34:44,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 22:34:44,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 22:34:44,120 INFO L87 Difference]: Start difference. First operand 11121 states and 13715 transitions. Second operand 10 states. [2020-10-14 22:34:45,386 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-14 22:34:52,849 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-10-14 22:35:14,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 22:35:14,654 INFO L93 Difference]: Finished difference Result 22726 states and 28429 transitions. [2020-10-14 22:35:14,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 22:35:14,659 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 305 [2020-10-14 22:35:14,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 22:35:14,700 INFO L225 Difference]: With dead ends: 22726 [2020-10-14 22:35:14,700 INFO L226 Difference]: Without dead ends: 12046 [2020-10-14 22:35:14,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2020-10-14 22:35:14,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12046 states. [2020-10-14 22:35:14,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12046 to 11580. [2020-10-14 22:35:14,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11580 states. [2020-10-14 22:35:15,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11580 states to 11580 states and 14188 transitions. [2020-10-14 22:35:15,026 INFO L78 Accepts]: Start accepts. Automaton has 11580 states and 14188 transitions. Word has length 305 [2020-10-14 22:35:15,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 22:35:15,026 INFO L479 AbstractCegarLoop]: Abstraction has 11580 states and 14188 transitions. [2020-10-14 22:35:15,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 22:35:15,027 INFO L276 IsEmpty]: Start isEmpty. Operand 11580 states and 14188 transitions. [2020-10-14 22:35:15,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-14 22:35:15,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 22:35:15,037 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 22:35:15,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 22:35:15,038 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 22:35:15,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 22:35:15,038 INFO L82 PathProgramCache]: Analyzing trace with hash 395411753, now seen corresponding path program 1 times [2020-10-14 22:35:15,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 22:35:15,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053430562] [2020-10-14 22:35:15,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 22:35:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:35:15,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:35:15,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:35:15,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 320 [2020-10-14 22:35:15,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:35:15,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 664 [2020-10-14 22:35:15,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:35:15,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:35:15,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 22:35:15,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 303 [2020-10-14 22:35:15,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 22:35:15,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:35:15,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 22:35:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:35:15,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:35:15,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:35:15,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 22:35:15,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:35:15,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 22:35:15,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:35:15,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:35:15,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 22:35:15,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 22:35:15,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 22:35:15,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:35:16,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 22:35:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:35:16,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:35:16,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:35:16,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 297 [2020-10-14 22:35:16,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:35:16,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-14 22:35:16,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:35:16,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:35:16,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 22:35:16,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 22:35:16,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 288 [2020-10-14 22:35:16,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 22:35:16,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-14 22:35:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 22:35:16,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 22:35:16,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 22:35:16,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 22:35:16,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 22:35:16,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 22:35:16,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 22:35:16,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 22:35:16,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 22:35:16,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 22:35:16,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 22:35:16,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 22:35:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 22:35:16,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053430562] [2020-10-14 22:35:16,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 22:35:16,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 22:35:16,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950012497] [2020-10-14 22:35:16,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 22:35:16,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 22:35:16,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 22:35:16,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 22:35:16,771 INFO L87 Difference]: Start difference. First operand 11580 states and 14188 transitions. Second operand 5 states.