/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:32:36,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:32:36,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:32:36,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:32:36,884 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:32:36,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:32:36,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:32:36,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:32:36,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:32:36,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:32:36,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:32:36,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:32:36,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:32:36,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:32:36,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:32:36,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:32:36,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:32:36,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:32:36,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:32:36,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:32:36,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:32:36,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:32:36,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:32:36,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:32:36,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:32:36,946 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:32:36,947 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:32:36,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:32:36,948 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:32:36,949 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:32:36,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:32:36,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:32:36,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:32:36,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:32:36,959 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:32:36,959 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:32:36,960 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:32:36,960 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:32:36,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:32:36,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:32:36,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:32:36,964 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 18:32:36,988 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:32:36,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:32:36,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:32:36,990 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:32:36,990 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:32:36,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:32:36,990 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:32:36,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:32:36,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:32:36,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:32:36,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:32:36,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:32:36,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:32:36,992 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:32:36,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:32:36,992 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:32:36,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:32:36,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:32:36,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:32:36,993 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:32:36,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:32:36,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:32:36,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:32:36,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:32:36,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:32:36,994 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:32:36,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:32:36,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:32:36,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:32:36,995 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 18:32:37,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:32:37,434 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:32:37,439 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:32:37,442 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:32:37,442 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:32:37,443 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-24 18:32:37,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/044ea1270/26753ba9dc164211b16c1fe4e5f557eb/FLAG80fd5de92 [2020-09-24 18:32:38,216 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:32:38,219 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-24 18:32:38,238 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/044ea1270/26753ba9dc164211b16c1fe4e5f557eb/FLAG80fd5de92 [2020-09-24 18:32:38,423 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/044ea1270/26753ba9dc164211b16c1fe4e5f557eb [2020-09-24 18:32:38,438 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:32:38,447 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:32:38,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:32:38,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:32:38,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:32:38,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:32:38" (1/1) ... [2020-09-24 18:32:38,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6833dace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:38, skipping insertion in model container [2020-09-24 18:32:38,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:32:38" (1/1) ... [2020-09-24 18:32:38,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:32:38,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:32:39,301 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:32:39,328 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:32:39,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:32:39,766 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:32:39,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:39 WrapperNode [2020-09-24 18:32:39,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:32:39,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:32:39,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:32:39,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:32:39,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:39" (1/1) ... [2020-09-24 18:32:39,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:39" (1/1) ... [2020-09-24 18:32:39,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:39" (1/1) ... [2020-09-24 18:32:39,811 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:39" (1/1) ... [2020-09-24 18:32:39,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:39" (1/1) ... [2020-09-24 18:32:39,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:39" (1/1) ... [2020-09-24 18:32:39,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:39" (1/1) ... [2020-09-24 18:32:39,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:32:39,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:32:39,911 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:32:39,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:32:39,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:32:40,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:32:40,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:32:40,012 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 18:32:40,012 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:32:40,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:32:40,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 18:32:40,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 18:32:40,013 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 18:32:40,013 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 18:32:40,014 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 18:32:40,014 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 18:32:40,014 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 18:32:40,014 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 18:32:40,015 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 18:32:40,015 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 18:32:40,015 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 18:32:40,015 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 18:32:40,016 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:32:40,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:32:40,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:32:42,221 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:32:42,221 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 18:32:42,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:32:42 BoogieIcfgContainer [2020-09-24 18:32:42,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:32:42,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:32:42,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:32:42,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:32:42,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:32:38" (1/3) ... [2020-09-24 18:32:42,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@343843da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:32:42, skipping insertion in model container [2020-09-24 18:32:42,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:32:39" (2/3) ... [2020-09-24 18:32:42,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@343843da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:32:42, skipping insertion in model container [2020-09-24 18:32:42,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:32:42" (3/3) ... [2020-09-24 18:32:42,247 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-24 18:32:42,260 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:32:42,275 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-24 18:32:42,297 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-24 18:32:42,333 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:32:42,333 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:32:42,334 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:32:42,334 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:32:42,334 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:32:42,334 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:32:42,334 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:32:42,334 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:32:42,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states. [2020-09-24 18:32:42,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-09-24 18:32:42,424 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:32:42,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:32:42,427 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:32:42,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:32:42,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1578062424, now seen corresponding path program 1 times [2020-09-24 18:32:42,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:32:42,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786378943] [2020-09-24 18:32:42,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:32:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:32:43,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:43,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:43,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:44,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:44,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:44,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:44,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:47,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:48,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:48,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:32:48,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 472 [2020-09-24 18:32:48,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 18:32:48,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5137 [2020-09-24 18:32:48,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:32:48,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:32:48,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 212 [2020-09-24 18:32:48,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-09-24 18:32:48,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 18:32:48,805 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-09-24 18:32:48,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:32:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:32:48,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:48,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:32:48,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 18:32:48,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:32:48,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-09-24 18:32:48,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:32:48,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:32:48,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:32:48,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:32:48,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:32:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:32:49,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786378943] [2020-09-24 18:32:49,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:32:49,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:32:49,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245735990] [2020-09-24 18:32:49,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:32:49,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:32:49,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:32:49,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:32:49,353 INFO L87 Difference]: Start difference. First operand 1237 states. Second operand 4 states. [2020-09-24 18:32:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:32:54,180 INFO L93 Difference]: Finished difference Result 2024 states and 2590 transitions. [2020-09-24 18:32:54,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 18:32:54,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 465 [2020-09-24 18:32:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:32:54,217 INFO L225 Difference]: With dead ends: 2024 [2020-09-24 18:32:54,218 INFO L226 Difference]: Without dead ends: 1455 [2020-09-24 18:32:54,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:32:54,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2020-09-24 18:32:54,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1448. [2020-09-24 18:32:54,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1448 states. [2020-09-24 18:32:54,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 1727 transitions. [2020-09-24 18:32:54,355 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 1727 transitions. Word has length 465 [2020-09-24 18:32:54,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:32:54,356 INFO L479 AbstractCegarLoop]: Abstraction has 1448 states and 1727 transitions. [2020-09-24 18:32:54,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:32:54,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 1727 transitions. [2020-09-24 18:32:54,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-09-24 18:32:54,367 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:32:54,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:32:54,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:32:54,368 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:32:54,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:32:54,369 INFO L82 PathProgramCache]: Analyzing trace with hash 888544568, now seen corresponding path program 1 times [2020-09-24 18:32:54,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:32:54,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904651038] [2020-09-24 18:32:54,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:32:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:32:54,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:54,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:55,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:55,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:55,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:55,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:55,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:58,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:32:59,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:32:59,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 472 [2020-09-24 18:32:59,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 18:32:59,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-09-24 18:32:59,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:32:59,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:32:59,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-09-24 18:32:59,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-09-24 18:32:59,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:33:00,125 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-09-24 18:33:00,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:33:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:00,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:00,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:00,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 18:33:00,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:33:00,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-24 18:33:00,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:00,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:33:00,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:33:00,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:33:00,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:33:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:33:00,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904651038] [2020-09-24 18:33:00,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:33:00,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 18:33:00,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767003988] [2020-09-24 18:33:00,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:33:00,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:33:00,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:33:00,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:33:00,783 INFO L87 Difference]: Start difference. First operand 1448 states and 1727 transitions. Second operand 5 states. [2020-09-24 18:33:07,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:33:07,190 INFO L93 Difference]: Finished difference Result 3862 states and 4652 transitions. [2020-09-24 18:33:07,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 18:33:07,191 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 465 [2020-09-24 18:33:07,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:33:07,204 INFO L225 Difference]: With dead ends: 3862 [2020-09-24 18:33:07,204 INFO L226 Difference]: Without dead ends: 2630 [2020-09-24 18:33:07,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:33:07,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2630 states. [2020-09-24 18:33:07,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2630 to 2503. [2020-09-24 18:33:07,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2503 states. [2020-09-24 18:33:07,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 3018 transitions. [2020-09-24 18:33:07,311 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 3018 transitions. Word has length 465 [2020-09-24 18:33:07,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:33:07,313 INFO L479 AbstractCegarLoop]: Abstraction has 2503 states and 3018 transitions. [2020-09-24 18:33:07,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:33:07,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 3018 transitions. [2020-09-24 18:33:07,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-09-24 18:33:07,320 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:33:07,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:33:07,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:33:07,321 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:33:07,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:33:07,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1155003978, now seen corresponding path program 1 times [2020-09-24 18:33:07,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:33:07,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743467197] [2020-09-24 18:33:07,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:33:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:07,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:07,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:07,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:08,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:08,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:08,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:09,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:11,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:11,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:11,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:12,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:12,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 473 [2020-09-24 18:33:12,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 18:33:12,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-09-24 18:33:12,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:12,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:33:12,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 192 [2020-09-24 18:33:12,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 18:33:12,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:33:12,897 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-09-24 18:33:12,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:33:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:12,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:12,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:12,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 18:33:12,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:33:12,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-24 18:33:12,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:12,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:33:12,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:33:12,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:33:12,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:33:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:33:13,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743467197] [2020-09-24 18:33:13,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:33:13,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:33:13,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987351181] [2020-09-24 18:33:13,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:33:13,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:33:13,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:33:13,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:33:13,141 INFO L87 Difference]: Start difference. First operand 2503 states and 3018 transitions. Second operand 4 states. [2020-09-24 18:33:17,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:33:17,559 INFO L93 Difference]: Finished difference Result 7078 states and 8594 transitions. [2020-09-24 18:33:17,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 18:33:17,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 466 [2020-09-24 18:33:17,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:33:17,581 INFO L225 Difference]: With dead ends: 7078 [2020-09-24 18:33:17,581 INFO L226 Difference]: Without dead ends: 4794 [2020-09-24 18:33:17,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:33:17,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4794 states. [2020-09-24 18:33:17,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4794 to 2505. [2020-09-24 18:33:17,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2505 states. [2020-09-24 18:33:17,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 3020 transitions. [2020-09-24 18:33:17,706 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 3020 transitions. Word has length 466 [2020-09-24 18:33:17,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:33:17,707 INFO L479 AbstractCegarLoop]: Abstraction has 2505 states and 3020 transitions. [2020-09-24 18:33:17,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:33:17,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 3020 transitions. [2020-09-24 18:33:17,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-09-24 18:33:17,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:33:17,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:33:17,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:33:17,714 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:33:17,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:33:17,719 INFO L82 PathProgramCache]: Analyzing trace with hash -675085190, now seen corresponding path program 1 times [2020-09-24 18:33:17,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:33:17,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273708818] [2020-09-24 18:33:17,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:33:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:17,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:18,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:18,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:18,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:18,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:18,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:20,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:22,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:22,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 474 [2020-09-24 18:33:22,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 18:33:22,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-09-24 18:33:22,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:22,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:33:22,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 183 [2020-09-24 18:33:22,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-09-24 18:33:22,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-24 18:33:23,417 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-09-24 18:33:23,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:33:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:33:23,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:33:23,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:33:23,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 18:33:23,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:33:23,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-24 18:33:23,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:33:23,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:33:23,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:33:23,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:33:23,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:33:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:33:23,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273708818] [2020-09-24 18:33:23,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:33:23,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 18:33:23,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886297591] [2020-09-24 18:33:23,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:33:23,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:33:23,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:33:23,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:33:23,777 INFO L87 Difference]: Start difference. First operand 2505 states and 3020 transitions. Second operand 5 states.