/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=0.8 --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.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 08:04:22,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 08:04:22,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 08:04:22,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 08:04:22,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 08:04:22,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 08:04:22,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 08:04:22,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 08:04:22,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 08:04:22,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 08:04:22,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 08:04:22,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 08:04:22,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 08:04:22,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 08:04:22,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 08:04:22,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 08:04:22,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 08:04:22,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 08:04:22,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 08:04:22,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 08:04:22,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 08:04:22,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 08:04:22,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 08:04:22,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 08:04:22,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 08:04:22,845 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 08:04:22,845 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 08:04:22,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 08:04:22,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 08:04:22,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 08:04:22,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 08:04:22,855 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 08:04:22,856 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 08:04:22,857 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 08:04:22,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 08:04:22,860 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 08:04:22,862 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 08:04:22,862 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 08:04:22,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 08:04:22,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 08:04:22,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 08:04:22,867 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 08:04:22,927 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 08:04:22,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 08:04:22,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 08:04:22,932 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 08:04:22,932 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 08:04:22,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 08:04:22,932 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 08:04:22,933 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 08:04:22,933 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 08:04:22,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 08:04:22,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 08:04:22,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 08:04:22,934 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 08:04:22,935 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 08:04:22,935 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 08:04:22,936 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 08:04:22,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 08:04:22,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 08:04:22,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 08:04:22,937 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 08:04:22,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 08:04:22,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 08:04:22,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 08:04:22,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 08:04:22,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 08:04:22,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 08:04:22,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 08:04:22,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 08:04:22,939 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 08:04:22,939 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=0.8;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=0.8;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=0.8;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=0.8;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=0.8;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=0.8;log-additional-information=true; [2020-09-25 08:04:23,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 08:04:23,436 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 08:04:23,443 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 08:04:23,445 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 08:04:23,448 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 08:04:23,450 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 08:04:23,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc82bd037/230c403531264037b611726ba33f44bd/FLAG7ab4649c8 [2020-09-25 08:04:24,154 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 08:04:24,155 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 08:04:24,172 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc82bd037/230c403531264037b611726ba33f44bd/FLAG7ab4649c8 [2020-09-25 08:04:24,419 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc82bd037/230c403531264037b611726ba33f44bd [2020-09-25 08:04:24,433 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 08:04:24,440 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 08:04:24,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 08:04:24,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 08:04:24,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 08:04:24,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:04:24" (1/1) ... [2020-09-25 08:04:24,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc106bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:24, skipping insertion in model container [2020-09-25 08:04:24,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:04:24" (1/1) ... [2020-09-25 08:04:24,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 08:04:24,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 08:04:25,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:04:25,181 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 08:04:25,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:04:25,378 INFO L208 MainTranslator]: Completed translation [2020-09-25 08:04:25,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:25 WrapperNode [2020-09-25 08:04:25,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 08:04:25,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 08:04:25,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 08:04:25,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 08:04:25,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:25" (1/1) ... [2020-09-25 08:04:25,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:25" (1/1) ... [2020-09-25 08:04:25,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:25" (1/1) ... [2020-09-25 08:04:25,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:25" (1/1) ... [2020-09-25 08:04:25,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:25" (1/1) ... [2020-09-25 08:04:25,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:25" (1/1) ... [2020-09-25 08:04:25,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:25" (1/1) ... [2020-09-25 08:04:25,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 08:04:25,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 08:04:25,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 08:04:25,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 08:04:25,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:25" (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 08:04:25,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 08:04:25,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 08:04:25,576 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 08:04:25,577 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 08:04:25,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 08:04:25,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 08:04:25,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 08:04:25,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 08:04:25,579 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 08:04:25,579 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 08:04:25,580 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 08:04:25,580 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 08:04:25,580 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 08:04:25,580 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 08:04:25,580 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 08:04:25,581 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 08:04:25,582 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 08:04:25,582 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 08:04:25,582 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 08:04:25,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 08:04:25,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 08:04:27,219 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 08:04:27,219 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 08:04:27,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:04:27 BoogieIcfgContainer [2020-09-25 08:04:27,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 08:04:27,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 08:04:27,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 08:04:27,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 08:04:27,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 08:04:24" (1/3) ... [2020-09-25 08:04:27,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@716b1163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:04:27, skipping insertion in model container [2020-09-25 08:04:27,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:25" (2/3) ... [2020-09-25 08:04:27,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@716b1163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:04:27, skipping insertion in model container [2020-09-25 08:04:27,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:04:27" (3/3) ... [2020-09-25 08:04:27,240 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 08:04:27,253 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 08:04:27,265 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 08:04:27,290 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 08:04:27,325 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 08:04:27,326 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 08:04:27,326 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 08:04:27,326 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 08:04:27,326 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 08:04:27,326 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 08:04:27,327 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 08:04:27,327 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 08:04:27,368 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states. [2020-09-25 08:04:27,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-09-25 08:04:27,419 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:04:27,421 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] [2020-09-25 08:04:27,421 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:04:27,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:04:27,430 INFO L82 PathProgramCache]: Analyzing trace with hash -361300248, now seen corresponding path program 1 times [2020-09-25 08:04:27,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:04:27,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457793136] [2020-09-25 08:04:27,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:04:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:04:28,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:28,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:28,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:29,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:29,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:29,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:29,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:31,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:32,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:33,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:04:33,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 414 [2020-09-25 08:04:33,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 08:04:33,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-09-25 08:04:33,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:04:33,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:04:33,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:04:33,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-09-25 08:04:33,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-25 08:04:33,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 08:04:33,800 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 08:04:33,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:04:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:04:33,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:33,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:04:33,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 08:04:33,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:04:33,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-25 08:04:33,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:04:33,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:04:33,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:04:33,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:04:33,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:04:33,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:04:34,287 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 08:04:34,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457793136] [2020-09-25 08:04:34,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:04:34,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 08:04:34,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634536529] [2020-09-25 08:04:34,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 08:04:34,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:04:34,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 08:04:34,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 08:04:34,331 INFO L87 Difference]: Start difference. First operand 813 states. Second operand 5 states. [2020-09-25 08:04:39,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:04:39,798 INFO L93 Difference]: Finished difference Result 2068 states and 2752 transitions. [2020-09-25 08:04:39,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 08:04:39,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 407 [2020-09-25 08:04:39,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:04:39,833 INFO L225 Difference]: With dead ends: 2068 [2020-09-25 08:04:39,833 INFO L226 Difference]: Without dead ends: 1234 [2020-09-25 08:04:39,844 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 08:04:39,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2020-09-25 08:04:39,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1232. [2020-09-25 08:04:39,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1232 states. [2020-09-25 08:04:39,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1499 transitions. [2020-09-25 08:04:39,989 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1499 transitions. Word has length 407 [2020-09-25 08:04:39,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:04:39,991 INFO L479 AbstractCegarLoop]: Abstraction has 1232 states and 1499 transitions. [2020-09-25 08:04:39,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 08:04:39,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1499 transitions. [2020-09-25 08:04:40,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-09-25 08:04:40,001 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:04:40,002 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] [2020-09-25 08:04:40,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 08:04:40,002 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:04:40,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:04:40,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1185743993, now seen corresponding path program 1 times [2020-09-25 08:04:40,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:04:40,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715794659] [2020-09-25 08:04:40,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:04:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:04:40,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:40,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:40,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:40,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:40,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:40,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:41,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:42,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:43,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:45,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:04:45,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 415 [2020-09-25 08:04:45,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 08:04:45,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-09-25 08:04:45,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:04:45,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:04:45,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:04:45,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 158 [2020-09-25 08:04:45,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-09-25 08:04:45,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-25 08:04:45,721 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 08:04:45,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:04:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:04:45,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:45,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:04:45,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 08:04:45,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:04:45,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-25 08:04:45,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:04:45,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:04:45,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:04:45,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:04:45,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:04:45,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:04:46,047 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 08:04:46,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715794659] [2020-09-25 08:04:46,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:04:46,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 08:04:46,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124610806] [2020-09-25 08:04:46,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 08:04:46,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:04:46,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 08:04:46,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 08:04:46,053 INFO L87 Difference]: Start difference. First operand 1232 states and 1499 transitions. Second operand 5 states. [2020-09-25 08:04:51,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:04:51,061 INFO L93 Difference]: Finished difference Result 3229 states and 3979 transitions. [2020-09-25 08:04:51,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 08:04:51,062 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 408 [2020-09-25 08:04:51,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:04:51,074 INFO L225 Difference]: With dead ends: 3229 [2020-09-25 08:04:51,075 INFO L226 Difference]: Without dead ends: 2231 [2020-09-25 08:04:51,078 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 08:04:51,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2020-09-25 08:04:51,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2229. [2020-09-25 08:04:51,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2229 states. [2020-09-25 08:04:51,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 2728 transitions. [2020-09-25 08:04:51,182 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 2728 transitions. Word has length 408 [2020-09-25 08:04:51,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:04:51,183 INFO L479 AbstractCegarLoop]: Abstraction has 2229 states and 2728 transitions. [2020-09-25 08:04:51,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 08:04:51,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 2728 transitions. [2020-09-25 08:04:51,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-25 08:04:51,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:04:51,189 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] [2020-09-25 08:04:51,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 08:04:51,190 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:04:51,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:04:51,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1169505706, now seen corresponding path program 1 times [2020-09-25 08:04:51,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:04:51,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591072162] [2020-09-25 08:04:51,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:04:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:04:51,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:51,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:51,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:51,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:52,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:52,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:53,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:53,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:54,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:54,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:56,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:04:56,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 416 [2020-09-25 08:04:56,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 08:04:56,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-09-25 08:04:56,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:04:56,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:04:56,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:04:56,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-09-25 08:04:56,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-09-25 08:04:56,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:04:56,907 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 08:04:56,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:04:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:04:56,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:56,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:04:56,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 08:04:56,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:04:56,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-25 08:04:56,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:04:56,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:04:56,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:04:56,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:04:56,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:04:56,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 08:04:57,520 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 08:04:57,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591072162] [2020-09-25 08:04:57,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:04:57,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 08:04:57,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673931595] [2020-09-25 08:04:57,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 08:04:57,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:04:57,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 08:04:57,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 08:04:57,525 INFO L87 Difference]: Start difference. First operand 2229 states and 2728 transitions. Second operand 5 states. [2020-09-25 08:05:02,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:05:02,507 INFO L93 Difference]: Finished difference Result 5684 states and 6998 transitions. [2020-09-25 08:05:02,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 08:05:02,508 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 409 [2020-09-25 08:05:02,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:05:02,527 INFO L225 Difference]: With dead ends: 5684 [2020-09-25 08:05:02,527 INFO L226 Difference]: Without dead ends: 4086 [2020-09-25 08:05:02,532 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 08:05:02,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2020-09-25 08:05:02,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 4084. [2020-09-25 08:05:02,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4084 states. [2020-09-25 08:05:02,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4084 states to 4084 states and 4988 transitions. [2020-09-25 08:05:02,754 INFO L78 Accepts]: Start accepts. Automaton has 4084 states and 4988 transitions. Word has length 409 [2020-09-25 08:05:02,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:05:02,761 INFO L479 AbstractCegarLoop]: Abstraction has 4084 states and 4988 transitions. [2020-09-25 08:05:02,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 08:05:02,762 INFO L276 IsEmpty]: Start isEmpty. Operand 4084 states and 4988 transitions. [2020-09-25 08:05:02,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-09-25 08:05:02,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:05:02,773 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] [2020-09-25 08:05:02,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 08:05:02,774 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:05:02,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:05:02,775 INFO L82 PathProgramCache]: Analyzing trace with hash 325014321, now seen corresponding path program 1 times [2020-09-25 08:05:02,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:05:02,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680654084] [2020-09-25 08:05:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:05:02,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:05:02,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:03,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:03,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:03,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:03,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:04,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:04,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:06,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:06,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:06,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:07,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:07,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:05:07,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 417 [2020-09-25 08:05:07,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 08:05:07,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-09-25 08:05:07,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:05:07,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:05:07,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:05:07,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 160 [2020-09-25 08:05:07,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 211 [2020-09-25 08:05:07,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:05:08,359 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 08:05:08,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:05:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:05:08,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:08,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:05:08,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 08:05:08,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:05:08,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-25 08:05:08,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:05:08,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:05:08,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:05:08,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:05:08,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:05:08,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:05:08,781 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 08:05:08,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680654084] [2020-09-25 08:05:08,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:05:08,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 08:05:08,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653843791] [2020-09-25 08:05:08,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 08:05:08,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:05:08,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 08:05:08,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 08:05:08,788 INFO L87 Difference]: Start difference. First operand 4084 states and 4988 transitions. Second operand 5 states.