/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 06:55:41,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 06:55:41,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 06:55:41,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 06:55:41,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 06:55:41,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 06:55:41,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 06:55:41,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 06:55:41,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 06:55:41,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 06:55:41,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 06:55:41,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 06:55:41,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 06:55:41,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 06:55:41,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 06:55:41,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 06:55:41,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 06:55:41,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 06:55:41,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 06:55:41,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 06:55:41,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 06:55:41,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 06:55:41,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 06:55:41,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 06:55:41,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 06:55:41,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 06:55:41,252 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 06:55:41,256 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 06:55:41,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 06:55:41,257 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 06:55:41,259 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 06:55:41,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 06:55:41,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 06:55:41,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 06:55:41,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 06:55:41,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 06:55:41,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 06:55:41,264 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 06:55:41,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 06:55:41,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 06:55:41,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 06:55:41,268 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 06:55:41,328 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 06:55:41,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 06:55:41,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 06:55:41,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 06:55:41,330 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 06:55:41,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 06:55:41,330 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 06:55:41,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 06:55:41,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 06:55:41,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 06:55:41,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 06:55:41,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 06:55:41,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 06:55:41,332 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 06:55:41,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 06:55:41,332 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 06:55:41,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 06:55:41,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 06:55:41,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 06:55:41,333 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 06:55:41,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 06:55:41,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:55:41,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 06:55:41,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 06:55:41,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 06:55:41,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 06:55:41,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 06:55:41,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 06:55:41,336 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 06:55:41,336 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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-09-25 06:55:41,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 06:55:41,806 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 06:55:41,811 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 06:55:41,813 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 06:55:41,813 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 06:55:41,814 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 06:55:41,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f4bf1bd9b/be60776ce57c43549aa609cc22e465e1/FLAGaff723823 [2020-09-25 06:55:42,540 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 06:55:42,541 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 06:55:42,566 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f4bf1bd9b/be60776ce57c43549aa609cc22e465e1/FLAGaff723823 [2020-09-25 06:55:42,760 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f4bf1bd9b/be60776ce57c43549aa609cc22e465e1 [2020-09-25 06:55:42,775 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 06:55:42,782 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 06:55:42,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 06:55:42,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 06:55:42,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 06:55:42,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:55:42" (1/1) ... [2020-09-25 06:55:42,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b8831ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:42, skipping insertion in model container [2020-09-25 06:55:42,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:55:42" (1/1) ... [2020-09-25 06:55:42,802 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 06:55:42,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 06:55:43,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:55:43,739 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 06:55:44,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:55:44,054 INFO L208 MainTranslator]: Completed translation [2020-09-25 06:55:44,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:44 WrapperNode [2020-09-25 06:55:44,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 06:55:44,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 06:55:44,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 06:55:44,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 06:55:44,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:44" (1/1) ... [2020-09-25 06:55:44,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:44" (1/1) ... [2020-09-25 06:55:44,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:44" (1/1) ... [2020-09-25 06:55:44,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:44" (1/1) ... [2020-09-25 06:55:44,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:44" (1/1) ... [2020-09-25 06:55:44,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:44" (1/1) ... [2020-09-25 06:55:44,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:44" (1/1) ... [2020-09-25 06:55:44,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 06:55:44,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 06:55:44,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 06:55:44,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 06:55:44,288 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:44" (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 06:55:44,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 06:55:44,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 06:55:44,393 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 06:55:44,393 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 06:55:44,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 06:55:44,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 06:55:44,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 06:55:44,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 06:55:44,395 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 06:55:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 06:55:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 06:55:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 06:55:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 06:55:44,397 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 06:55:44,397 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 06:55:44,398 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 06:55:44,398 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 06:55:44,398 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 06:55:44,398 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 06:55:44,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 06:55:44,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 06:55:46,481 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 06:55:46,482 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 06:55:46,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:55:46 BoogieIcfgContainer [2020-09-25 06:55:46,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 06:55:46,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 06:55:46,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 06:55:46,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 06:55:46,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 06:55:42" (1/3) ... [2020-09-25 06:55:46,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33bff4a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:55:46, skipping insertion in model container [2020-09-25 06:55:46,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:44" (2/3) ... [2020-09-25 06:55:46,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33bff4a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:55:46, skipping insertion in model container [2020-09-25 06:55:46,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:55:46" (3/3) ... [2020-09-25 06:55:46,506 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 06:55:46,518 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 06:55:46,534 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-25 06:55:46,556 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-25 06:55:46,596 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 06:55:46,596 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 06:55:46,596 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 06:55:46,596 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 06:55:46,596 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 06:55:46,596 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 06:55:46,597 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 06:55:46,597 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 06:55:46,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states. [2020-09-25 06:55:46,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-25 06:55:46,690 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:55:46,692 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] [2020-09-25 06:55:46,692 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:55:46,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:55:46,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1303335379, now seen corresponding path program 1 times [2020-09-25 06:55:46,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:55:46,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668146707] [2020-09-25 06:55:46,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:55:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:47,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:47,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:48,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:48,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:48,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:48,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:49,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:51,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:52,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:52,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-25 06:55:52,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 06:55:52,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-09-25 06:55:52,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:52,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:52,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:55:52,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 207 [2020-09-25 06:55:52,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-09-25 06:55:52,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 06:55:53,031 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 06:55:53,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:55:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:53,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:53,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:53,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 06:55:53,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:55:53,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-09-25 06:55:53,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:53,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:53,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:55:53,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:55:53,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:55:53,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:55:53,663 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 06:55:53,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668146707] [2020-09-25 06:55:53,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:55:53,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 06:55:53,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455059454] [2020-09-25 06:55:53,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 06:55:53,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:55:53,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 06:55:53,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 06:55:53,722 INFO L87 Difference]: Start difference. First operand 1233 states. Second operand 4 states. [2020-09-25 06:55:58,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:55:58,781 INFO L93 Difference]: Finished difference Result 2019 states and 2601 transitions. [2020-09-25 06:55:58,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 06:55:58,784 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 456 [2020-09-25 06:55:58,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:55:58,823 INFO L225 Difference]: With dead ends: 2019 [2020-09-25 06:55:58,823 INFO L226 Difference]: Without dead ends: 1445 [2020-09-25 06:55:58,832 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 [2020-09-25 06:55:58,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2020-09-25 06:55:58,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1438. [2020-09-25 06:55:58,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1438 states. [2020-09-25 06:55:58,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 1723 transitions. [2020-09-25 06:55:58,974 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 1723 transitions. Word has length 456 [2020-09-25 06:55:58,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:55:58,976 INFO L479 AbstractCegarLoop]: Abstraction has 1438 states and 1723 transitions. [2020-09-25 06:55:58,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 06:55:58,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 1723 transitions. [2020-09-25 06:55:58,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-25 06:55:58,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:55:58,988 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] [2020-09-25 06:55:58,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 06:55:58,989 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:55:58,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:55:58,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1418962381, now seen corresponding path program 1 times [2020-09-25 06:55:58,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:55:58,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474901343] [2020-09-25 06:55:58,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:55:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:59,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:59,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:59,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:59,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:59,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:00,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:00,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:02,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:03,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:04,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:56:04,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-25 06:56:04,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 06:56:04,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 06:56:04,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:56:04,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:56:04,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:56:04,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 208 [2020-09-25 06:56:04,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 218 [2020-09-25 06:56:04,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 12 [2020-09-25 06:56:04,616 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 06:56:04,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:56:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:56:04,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:04,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:56:04,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 06:56:04,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:56:04,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-09-25 06:56:04,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:56:04,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:56:04,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:56:04,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:56:04,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:56:04,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 06:56:05,187 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 06:56:05,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474901343] [2020-09-25 06:56:05,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:56:05,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 06:56:05,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422694458] [2020-09-25 06:56:05,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 06:56:05,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:56:05,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 06:56:05,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 06:56:05,197 INFO L87 Difference]: Start difference. First operand 1438 states and 1723 transitions. Second operand 4 states. [2020-09-25 06:56:09,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:56:09,049 INFO L93 Difference]: Finished difference Result 2635 states and 3268 transitions. [2020-09-25 06:56:09,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 06:56:09,050 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 456 [2020-09-25 06:56:09,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:56:09,062 INFO L225 Difference]: With dead ends: 2635 [2020-09-25 06:56:09,062 INFO L226 Difference]: Without dead ends: 2144 [2020-09-25 06:56:09,067 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 06:56:09,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2020-09-25 06:56:09,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 2132. [2020-09-25 06:56:09,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2132 states. [2020-09-25 06:56:09,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 2619 transitions. [2020-09-25 06:56:09,130 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 2619 transitions. Word has length 456 [2020-09-25 06:56:09,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:56:09,131 INFO L479 AbstractCegarLoop]: Abstraction has 2132 states and 2619 transitions. [2020-09-25 06:56:09,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 06:56:09,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 2619 transitions. [2020-09-25 06:56:09,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-25 06:56:09,138 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:56:09,139 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] [2020-09-25 06:56:09,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 06:56:09,140 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:56:09,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:56:09,140 INFO L82 PathProgramCache]: Analyzing trace with hash 496290573, now seen corresponding path program 1 times [2020-09-25 06:56:09,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:56:09,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437181899] [2020-09-25 06:56:09,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:56:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:56:09,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:09,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:09,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:09,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:10,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:10,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:10,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:13,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:14,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:56:14,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-25 06:56:14,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 06:56:14,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-09-25 06:56:14,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:56:14,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:56:14,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 06:56:14,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 176 [2020-09-25 06:56:14,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-09-25 06:56:14,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:56:14,852 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 06:56:14,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:56:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:56:14,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:14,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:56:14,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 06:56:14,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:56:14,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-25 06:56:14,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:56:14,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:56:14,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:56:14,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:56:14,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:56:14,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:56:15,311 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 06:56:15,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437181899] [2020-09-25 06:56:15,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:56:15,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 06:56:15,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540321964] [2020-09-25 06:56:15,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:56:15,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:56:15,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:56:15,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:56:15,317 INFO L87 Difference]: Start difference. First operand 2132 states and 2619 transitions. Second operand 5 states. [2020-09-25 06:56:22,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:56:22,018 INFO L93 Difference]: Finished difference Result 5887 states and 7288 transitions. [2020-09-25 06:56:22,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 06:56:22,019 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 456 [2020-09-25 06:56:22,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:56:22,037 INFO L225 Difference]: With dead ends: 5887 [2020-09-25 06:56:22,038 INFO L226 Difference]: Without dead ends: 3958 [2020-09-25 06:56:22,043 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 06:56:22,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2020-09-25 06:56:22,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 3827. [2020-09-25 06:56:22,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3827 states. [2020-09-25 06:56:22,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 4733 transitions. [2020-09-25 06:56:22,191 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 4733 transitions. Word has length 456 [2020-09-25 06:56:22,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:56:22,192 INFO L479 AbstractCegarLoop]: Abstraction has 3827 states and 4733 transitions. [2020-09-25 06:56:22,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 06:56:22,198 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 4733 transitions. [2020-09-25 06:56:22,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2020-09-25 06:56:22,208 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:56:22,208 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] [2020-09-25 06:56:22,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 06:56:22,209 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:56:22,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:56:22,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1610099519, now seen corresponding path program 1 times [2020-09-25 06:56:22,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:56:22,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514153863] [2020-09-25 06:56:22,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:56:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:56:22,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:22,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:22,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:22,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:22,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:23,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:23,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:25,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:27,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:56:27,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 464 [2020-09-25 06:56:27,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 06:56:27,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-09-25 06:56:27,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:56:27,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:56:27,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 06:56:27,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-09-25 06:56:27,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-09-25 06:56:27,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 06:56:27,773 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 06:56:27,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:56:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:56:27,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:27,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:56:27,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 06:56:27,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:56:27,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 06:56:27,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:56:27,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:56:27,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:56:27,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:56:27,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:56:27,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:56:28,106 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 06:56:28,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514153863] [2020-09-25 06:56:28,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:56:28,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 06:56:28,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004376138] [2020-09-25 06:56:28,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:56:28,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:56:28,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:56:28,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:56:28,109 INFO L87 Difference]: Start difference. First operand 3827 states and 4733 transitions. Second operand 5 states.