/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 12:34:09,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 12:34:09,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 12:34:09,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 12:34:09,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 12:34:09,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 12:34:09,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 12:34:09,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 12:34:09,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 12:34:09,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 12:34:09,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 12:34:09,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 12:34:09,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 12:34:09,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 12:34:09,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 12:34:09,181 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 12:34:09,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 12:34:09,184 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 12:34:09,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 12:34:09,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 12:34:09,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 12:34:09,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 12:34:09,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 12:34:09,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 12:34:09,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 12:34:09,218 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 12:34:09,218 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 12:34:09,219 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 12:34:09,220 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 12:34:09,223 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 12:34:09,223 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 12:34:09,224 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 12:34:09,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 12:34:09,229 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 12:34:09,230 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 12:34:09,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 12:34:09,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 12:34:09,232 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 12:34:09,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 12:34:09,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 12:34:09,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 12:34:09,235 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 12:34:09,282 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 12:34:09,283 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 12:34:09,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 12:34:09,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 12:34:09,285 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 12:34:09,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 12:34:09,285 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 12:34:09,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 12:34:09,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 12:34:09,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 12:34:09,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 12:34:09,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 12:34:09,286 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 12:34:09,286 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 12:34:09,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 12:34:09,287 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 12:34:09,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 12:34:09,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 12:34:09,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 12:34:09,288 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 12:34:09,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 12:34:09,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:34:09,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 12:34:09,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 12:34:09,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 12:34:09,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 12:34:09,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 12:34:09,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 12:34:09,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 12:34:09,290 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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-09-25 12:34:09,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 12:34:09,750 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 12:34:09,757 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 12:34:09,759 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 12:34:09,759 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 12:34:09,760 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 12:34:09,861 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d39e99fb4/02236b96dd924e719452affaf057f4a5/FLAGbf3c51aa9 [2020-09-25 12:34:10,516 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 12:34:10,517 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 12:34:10,535 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d39e99fb4/02236b96dd924e719452affaf057f4a5/FLAGbf3c51aa9 [2020-09-25 12:34:10,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d39e99fb4/02236b96dd924e719452affaf057f4a5 [2020-09-25 12:34:10,768 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 12:34:10,774 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 12:34:10,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 12:34:10,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 12:34:10,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 12:34:10,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:34:10" (1/1) ... [2020-09-25 12:34:10,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44406637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:34:10, skipping insertion in model container [2020-09-25 12:34:10,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:34:10" (1/1) ... [2020-09-25 12:34:10,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 12:34:10,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 12:34:11,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:34:11,575 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 12:34:12,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:34:12,120 INFO L208 MainTranslator]: Completed translation [2020-09-25 12:34:12,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:34:12 WrapperNode [2020-09-25 12:34:12,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 12:34:12,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 12:34:12,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 12:34:12,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 12:34:12,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:34:12" (1/1) ... [2020-09-25 12:34:12,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:34:12" (1/1) ... [2020-09-25 12:34:12,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:34:12" (1/1) ... [2020-09-25 12:34:12,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:34:12" (1/1) ... [2020-09-25 12:34:12,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:34:12" (1/1) ... [2020-09-25 12:34:12,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:34:12" (1/1) ... [2020-09-25 12:34:12,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:34:12" (1/1) ... [2020-09-25 12:34:12,238 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 12:34:12,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 12:34:12,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 12:34:12,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 12:34:12,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:34:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:34:12,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 12:34:12,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 12:34:12,355 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 12:34:12,355 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 12:34:12,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 12:34:12,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 12:34:12,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 12:34:12,357 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 12:34:12,357 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 12:34:12,357 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 12:34:12,357 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 12:34:12,357 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 12:34:12,358 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 12:34:12,358 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 12:34:12,358 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 12:34:12,359 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 12:34:12,359 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 12:34:12,360 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 12:34:12,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 12:34:12,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 12:34:14,426 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 12:34:14,426 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 12:34:14,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:34:14 BoogieIcfgContainer [2020-09-25 12:34:14,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 12:34:14,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 12:34:14,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 12:34:14,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 12:34:14,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:34:10" (1/3) ... [2020-09-25 12:34:14,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ce3aca1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:34:14, skipping insertion in model container [2020-09-25 12:34:14,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:34:12" (2/3) ... [2020-09-25 12:34:14,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ce3aca1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:34:14, skipping insertion in model container [2020-09-25 12:34:14,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:34:14" (3/3) ... [2020-09-25 12:34:14,459 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 12:34:14,472 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 12:34:14,492 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-25 12:34:14,516 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-25 12:34:14,560 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 12:34:14,560 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 12:34:14,560 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 12:34:14,560 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 12:34:14,560 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 12:34:14,561 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 12:34:14,561 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 12:34:14,561 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 12:34:14,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states. [2020-09-25 12:34:14,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-09-25 12:34:14,643 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:34:14,645 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] [2020-09-25 12:34:14,646 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:34:14,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:34:14,654 INFO L82 PathProgramCache]: Analyzing trace with hash -219806221, now seen corresponding path program 1 times [2020-09-25 12:34:14,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:34:14,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924369441] [2020-09-25 12:34:14,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:34:15,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:34:15,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:15,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:16,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:16,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:16,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:16,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:17,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:20,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:34:20,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 430 [2020-09-25 12:34:20,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:34:20,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-09-25 12:34:20,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:34:20,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:34:20,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:34:20,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 203 [2020-09-25 12:34:20,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-09-25 12:34:20,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 12 [2020-09-25 12:34:20,906 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-25 12:34:20,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:34:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:34:20,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:20,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:34:20,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 12:34:20,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:34:20,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-25 12:34:20,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:34:20,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:34:20,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:34:20,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:34:20,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:34:20,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:34:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:34:21,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924369441] [2020-09-25 12:34:21,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:34:21,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 12:34:21,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161797095] [2020-09-25 12:34:21,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 12:34:21,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:34:21,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 12:34:21,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 12:34:21,286 INFO L87 Difference]: Start difference. First operand 1127 states. Second operand 4 states. [2020-09-25 12:34:25,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:34:25,961 INFO L93 Difference]: Finished difference Result 1833 states and 2360 transitions. [2020-09-25 12:34:25,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 12:34:25,965 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 423 [2020-09-25 12:34:25,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:34:25,997 INFO L225 Difference]: With dead ends: 1833 [2020-09-25 12:34:25,997 INFO L226 Difference]: Without dead ends: 1303 [2020-09-25 12:34:26,006 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 [2020-09-25 12:34:26,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2020-09-25 12:34:26,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1296. [2020-09-25 12:34:26,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1296 states. [2020-09-25 12:34:26,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1545 transitions. [2020-09-25 12:34:26,125 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1545 transitions. Word has length 423 [2020-09-25 12:34:26,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:34:26,127 INFO L479 AbstractCegarLoop]: Abstraction has 1296 states and 1545 transitions. [2020-09-25 12:34:26,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 12:34:26,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1545 transitions. [2020-09-25 12:34:26,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-09-25 12:34:26,139 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:34:26,140 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] [2020-09-25 12:34:26,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 12:34:26,140 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:34:26,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:34:26,141 INFO L82 PathProgramCache]: Analyzing trace with hash -74379501, now seen corresponding path program 1 times [2020-09-25 12:34:26,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:34:26,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646177586] [2020-09-25 12:34:26,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:34:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:34:26,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:26,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:26,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:26,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:27,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:27,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:30,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:30,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:30,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:31,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:34:31,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 430 [2020-09-25 12:34:31,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 12:34:31,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-09-25 12:34:31,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:34:31,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:34:31,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 12:34:31,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 172 [2020-09-25 12:34:31,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-09-25 12:34:31,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:34:31,764 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-25 12:34:31,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:34:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:34:31,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:31,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:34:31,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 12:34:31,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:34:31,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-09-25 12:34:31,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:34:31,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:34:31,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:34:31,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:34:31,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:34:31,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:34:32,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:34:32,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646177586] [2020-09-25 12:34:32,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:34:32,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 12:34:32,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689334470] [2020-09-25 12:34:32,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:34:32,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:34:32,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:34:32,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:34:32,212 INFO L87 Difference]: Start difference. First operand 1296 states and 1545 transitions. Second operand 5 states. [2020-09-25 12:34:37,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:34:37,789 INFO L93 Difference]: Finished difference Result 3439 states and 4147 transitions. [2020-09-25 12:34:37,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 12:34:37,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 423 [2020-09-25 12:34:37,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:34:37,803 INFO L225 Difference]: With dead ends: 3439 [2020-09-25 12:34:37,804 INFO L226 Difference]: Without dead ends: 2342 [2020-09-25 12:34:37,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 12:34:37,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2020-09-25 12:34:37,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 2220. [2020-09-25 12:34:37,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2220 states. [2020-09-25 12:34:37,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 2679 transitions. [2020-09-25 12:34:37,873 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 2679 transitions. Word has length 423 [2020-09-25 12:34:37,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:34:37,874 INFO L479 AbstractCegarLoop]: Abstraction has 2220 states and 2679 transitions. [2020-09-25 12:34:37,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:34:37,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 2679 transitions. [2020-09-25 12:34:37,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2020-09-25 12:34:37,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:34:37,886 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] [2020-09-25 12:34:37,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 12:34:37,886 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:34:37,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:34:37,887 INFO L82 PathProgramCache]: Analyzing trace with hash -2123239659, now seen corresponding path program 1 times [2020-09-25 12:34:37,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:34:37,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539090319] [2020-09-25 12:34:37,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:34:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:34:38,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:38,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:38,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:38,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:38,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:38,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:41,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:42,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:42,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:34:42,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 431 [2020-09-25 12:34:42,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 12:34:42,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-25 12:34:42,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:34:42,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:34:42,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 12:34:42,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 171 [2020-09-25 12:34:42,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-09-25 12:34:42,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:34:43,475 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-25 12:34:43,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:34:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:34:43,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:43,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:34:43,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 12:34:43,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:34:43,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-25 12:34:43,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:34:43,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:34:43,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:34:43,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:34:43,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:34:43,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:34:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:34:43,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539090319] [2020-09-25 12:34:43,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:34:43,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 12:34:43,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586178244] [2020-09-25 12:34:43,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:34:43,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:34:43,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:34:43,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:34:43,910 INFO L87 Difference]: Start difference. First operand 2220 states and 2679 transitions. Second operand 5 states. [2020-09-25 12:34:50,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:34:50,572 INFO L93 Difference]: Finished difference Result 6087 states and 7401 transitions. [2020-09-25 12:34:50,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 12:34:50,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 424 [2020-09-25 12:34:50,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:34:50,593 INFO L225 Difference]: With dead ends: 6087 [2020-09-25 12:34:50,593 INFO L226 Difference]: Without dead ends: 4141 [2020-09-25 12:34:50,597 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 [2020-09-25 12:34:50,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2020-09-25 12:34:50,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 4028. [2020-09-25 12:34:50,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4028 states. [2020-09-25 12:34:50,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 4884 transitions. [2020-09-25 12:34:50,739 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 4884 transitions. Word has length 424 [2020-09-25 12:34:50,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:34:50,740 INFO L479 AbstractCegarLoop]: Abstraction has 4028 states and 4884 transitions. [2020-09-25 12:34:50,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:34:50,740 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 4884 transitions. [2020-09-25 12:34:50,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-09-25 12:34:50,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:34:50,760 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] [2020-09-25 12:34:50,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 12:34:50,760 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:34:50,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:34:50,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1833176661, now seen corresponding path program 1 times [2020-09-25 12:34:50,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:34:50,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072611537] [2020-09-25 12:34:50,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:34:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:34:50,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:51,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:51,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:51,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:51,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:52,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:52,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:53,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:55,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:34:55,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 432 [2020-09-25 12:34:55,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 12:34:55,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 12:34:55,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:34:55,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:34:55,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 12:34:55,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 175 [2020-09-25 12:34:55,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-25 12:34:55,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:34:56,450 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-25 12:34:56,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:34:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:34:56,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:34:56,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:34:56,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 12:34:56,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:34:56,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-25 12:34:56,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:34:56,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:34:56,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:34:56,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:34:56,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:34:56,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:34:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:34:56,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072611537] [2020-09-25 12:34:56,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:34:56,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 12:34:56,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962394490] [2020-09-25 12:34:56,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:34:56,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:34:56,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:34:56,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:34:56,720 INFO L87 Difference]: Start difference. First operand 4028 states and 4884 transitions. Second operand 5 states.