/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=WIDEST --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 03:30:00,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 03:30:00,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 03:30:00,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 03:30:00,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 03:30:00,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 03:30:00,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 03:30:00,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 03:30:00,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 03:30:00,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 03:30:00,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 03:30:00,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 03:30:00,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 03:30:00,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 03:30:00,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 03:30:00,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 03:30:00,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 03:30:00,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 03:30:00,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 03:30:00,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 03:30:00,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 03:30:00,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 03:30:00,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 03:30:00,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 03:30:00,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 03:30:00,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 03:30:00,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 03:30:00,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 03:30:00,613 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 03:30:00,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 03:30:00,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 03:30:00,620 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 03:30:00,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 03:30:00,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 03:30:00,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 03:30:00,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 03:30:00,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 03:30:00,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 03:30:00,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 03:30:00,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 03:30:00,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 03:30:00,630 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 03:30:00,676 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 03:30:00,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 03:30:00,678 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 03:30:00,678 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 03:30:00,679 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 03:30:00,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 03:30:00,679 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 03:30:00,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 03:30:00,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 03:30:00,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 03:30:00,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 03:30:00,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 03:30:00,681 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 03:30:00,682 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 03:30:00,682 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 03:30:00,682 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 03:30:00,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 03:30:00,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 03:30:00,683 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 03:30:00,683 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 03:30:00,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 03:30:00,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:30:00,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 03:30:00,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 03:30:00,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 03:30:00,684 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 03:30:00,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 03:30:00,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 03:30:00,685 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 03:30:00,685 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=WIDEST;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=WIDEST;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=WIDEST;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=WIDEST;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=WIDEST;log-additional-information=true; [2020-09-25 03:30:01,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 03:30:01,196 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 03:30:01,201 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 03:30:01,204 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 03:30:01,205 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 03:30:01,206 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 03:30:01,301 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c37f5fa5/4e4f5b7359394810868440074b718593/FLAG91df0bf50 [2020-09-25 03:30:01,970 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 03:30:01,971 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 03:30:01,988 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c37f5fa5/4e4f5b7359394810868440074b718593/FLAG91df0bf50 [2020-09-25 03:30:02,224 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c37f5fa5/4e4f5b7359394810868440074b718593 [2020-09-25 03:30:02,240 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 03:30:02,246 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 03:30:02,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 03:30:02,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 03:30:02,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 03:30:02,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:30:02" (1/1) ... [2020-09-25 03:30:02,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e04f8f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:30:02, skipping insertion in model container [2020-09-25 03:30:02,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:30:02" (1/1) ... [2020-09-25 03:30:02,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 03:30:02,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 03:30:02,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:30:02,955 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 03:30:03,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:30:03,198 INFO L208 MainTranslator]: Completed translation [2020-09-25 03:30:03,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:30:03 WrapperNode [2020-09-25 03:30:03,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 03:30:03,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 03:30:03,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 03:30:03,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 03:30:03,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:30:03" (1/1) ... [2020-09-25 03:30:03,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:30:03" (1/1) ... [2020-09-25 03:30:03,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:30:03" (1/1) ... [2020-09-25 03:30:03,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:30:03" (1/1) ... [2020-09-25 03:30:03,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:30:03" (1/1) ... [2020-09-25 03:30:03,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:30:03" (1/1) ... [2020-09-25 03:30:03,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:30:03" (1/1) ... [2020-09-25 03:30:03,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 03:30:03,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 03:30:03,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 03:30:03,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 03:30:03,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:30:03" (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 03:30:03,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 03:30:03,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 03:30:03,404 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 03:30:03,404 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 03:30:03,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 03:30:03,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 03:30:03,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 03:30:03,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 03:30:03,406 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 03:30:03,407 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 03:30:03,407 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 03:30:03,407 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 03:30:03,407 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 03:30:03,407 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 03:30:03,408 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 03:30:03,409 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 03:30:03,409 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 03:30:03,409 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 03:30:03,409 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 03:30:03,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 03:30:03,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 03:30:05,093 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 03:30:05,094 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 03:30:05,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:30:05 BoogieIcfgContainer [2020-09-25 03:30:05,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 03:30:05,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 03:30:05,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 03:30:05,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 03:30:05,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 03:30:02" (1/3) ... [2020-09-25 03:30:05,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7f8d0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:30:05, skipping insertion in model container [2020-09-25 03:30:05,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:30:03" (2/3) ... [2020-09-25 03:30:05,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7f8d0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:30:05, skipping insertion in model container [2020-09-25 03:30:05,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:30:05" (3/3) ... [2020-09-25 03:30:05,114 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 03:30:05,125 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 03:30:05,136 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 03:30:05,161 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 03:30:05,197 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 03:30:05,197 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 03:30:05,197 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 03:30:05,198 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 03:30:05,198 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 03:30:05,198 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 03:30:05,198 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 03:30:05,198 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 03:30:05,236 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states. [2020-09-25 03:30:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-09-25 03:30:05,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:30:05,265 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 03:30:05,265 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:30:05,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:30:05,274 INFO L82 PathProgramCache]: Analyzing trace with hash -361300248, now seen corresponding path program 1 times [2020-09-25 03:30:05,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:30:05,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447938862] [2020-09-25 03:30:05,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:30:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:30:06,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:06,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:06,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:06,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:07,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:07,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:07,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:09,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:10,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:10,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:30:10,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 414 [2020-09-25 03:30:10,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 03:30:10,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-09-25 03:30:10,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:30:10,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 03:30:10,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-09-25 03:30:10,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-25 03:30:10,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 03:30:11,563 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 03:30:11,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:30:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:30:11,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:11,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:30:11,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 03:30:11,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:30:11,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-25 03:30:11,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:30:11,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:30:11,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:30:11,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:30:11,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:30:12,031 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 03:30:12,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447938862] [2020-09-25 03:30:12,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:30:12,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 03:30:12,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171485964] [2020-09-25 03:30:12,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 03:30:12,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:30:12,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 03:30:12,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 03:30:12,076 INFO L87 Difference]: Start difference. First operand 813 states. Second operand 5 states. [2020-09-25 03:30:17,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:30:17,557 INFO L93 Difference]: Finished difference Result 2068 states and 2752 transitions. [2020-09-25 03:30:17,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 03:30:17,559 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 407 [2020-09-25 03:30:17,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:30:17,591 INFO L225 Difference]: With dead ends: 2068 [2020-09-25 03:30:17,591 INFO L226 Difference]: Without dead ends: 1234 [2020-09-25 03:30:17,602 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 03:30:17,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2020-09-25 03:30:17,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1232. [2020-09-25 03:30:17,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1232 states. [2020-09-25 03:30:17,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1499 transitions. [2020-09-25 03:30:17,763 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1499 transitions. Word has length 407 [2020-09-25 03:30:17,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:30:17,765 INFO L479 AbstractCegarLoop]: Abstraction has 1232 states and 1499 transitions. [2020-09-25 03:30:17,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 03:30:17,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1499 transitions. [2020-09-25 03:30:17,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-09-25 03:30:17,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:30:17,774 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 03:30:17,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 03:30:17,774 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:30:17,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:30:17,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1185743993, now seen corresponding path program 1 times [2020-09-25 03:30:17,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:30:17,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206933379] [2020-09-25 03:30:17,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:30:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:30:17,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:18,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:18,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:18,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:18,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:18,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:18,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:21,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:21,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:22,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:30:22,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 415 [2020-09-25 03:30:22,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 03:30:22,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-09-25 03:30:22,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:30:22,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 03:30:22,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 158 [2020-09-25 03:30:22,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-09-25 03:30:22,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:30:23,581 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 03:30:23,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:30:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:30:23,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:23,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:30:23,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 03:30:23,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:30:23,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-25 03:30:23,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:30:23,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:30:23,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:30:23,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:30:23,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:30:23,965 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 03:30:23,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206933379] [2020-09-25 03:30:23,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:30:23,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 03:30:23,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262916570] [2020-09-25 03:30:23,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 03:30:23,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:30:23,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 03:30:23,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 03:30:23,974 INFO L87 Difference]: Start difference. First operand 1232 states and 1499 transitions. Second operand 5 states. [2020-09-25 03:30:28,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:30:28,891 INFO L93 Difference]: Finished difference Result 3229 states and 3979 transitions. [2020-09-25 03:30:28,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 03:30:28,892 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 408 [2020-09-25 03:30:28,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:30:28,914 INFO L225 Difference]: With dead ends: 3229 [2020-09-25 03:30:28,914 INFO L226 Difference]: Without dead ends: 2231 [2020-09-25 03:30:28,920 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 03:30:28,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2020-09-25 03:30:29,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2229. [2020-09-25 03:30:29,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2229 states. [2020-09-25 03:30:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 2728 transitions. [2020-09-25 03:30:29,141 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 2728 transitions. Word has length 408 [2020-09-25 03:30:29,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:30:29,144 INFO L479 AbstractCegarLoop]: Abstraction has 2229 states and 2728 transitions. [2020-09-25 03:30:29,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 03:30:29,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 2728 transitions. [2020-09-25 03:30:29,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-25 03:30:29,163 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:30:29,164 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 03:30:29,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 03:30:29,165 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:30:29,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:30:29,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1169505706, now seen corresponding path program 1 times [2020-09-25 03:30:29,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:30:29,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797674263] [2020-09-25 03:30:29,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:30:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:30:29,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:29,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:29,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:29,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:30,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:30,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:31,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:31,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:32,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:32,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:34,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:30:34,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 416 [2020-09-25 03:30:34,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 03:30:34,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-09-25 03:30:34,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:30:34,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 03:30:34,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-09-25 03:30:34,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-09-25 03:30:34,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:30:34,903 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 03:30:34,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:30:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:30:34,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:34,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:30:34,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 03:30:34,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:30:34,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-25 03:30:34,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:30:34,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:30:34,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:30:34,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:30:34,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:30:35,618 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 03:30:35,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797674263] [2020-09-25 03:30:35,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:30:35,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 03:30:35,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219121657] [2020-09-25 03:30:35,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 03:30:35,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:30:35,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 03:30:35,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 03:30:35,624 INFO L87 Difference]: Start difference. First operand 2229 states and 2728 transitions. Second operand 5 states. [2020-09-25 03:30:40,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:30:40,588 INFO L93 Difference]: Finished difference Result 5684 states and 6998 transitions. [2020-09-25 03:30:40,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 03:30:40,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 409 [2020-09-25 03:30:40,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:30:40,609 INFO L225 Difference]: With dead ends: 5684 [2020-09-25 03:30:40,609 INFO L226 Difference]: Without dead ends: 4086 [2020-09-25 03:30:40,613 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 03:30:40,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2020-09-25 03:30:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 4084. [2020-09-25 03:30:40,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4084 states. [2020-09-25 03:30:40,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4084 states to 4084 states and 4988 transitions. [2020-09-25 03:30:40,802 INFO L78 Accepts]: Start accepts. Automaton has 4084 states and 4988 transitions. Word has length 409 [2020-09-25 03:30:40,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:30:40,803 INFO L479 AbstractCegarLoop]: Abstraction has 4084 states and 4988 transitions. [2020-09-25 03:30:40,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 03:30:40,803 INFO L276 IsEmpty]: Start isEmpty. Operand 4084 states and 4988 transitions. [2020-09-25 03:30:40,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-09-25 03:30:40,822 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:30:40,826 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 03:30:40,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 03:30:40,827 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:30:40,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:30:40,828 INFO L82 PathProgramCache]: Analyzing trace with hash 325014321, now seen corresponding path program 1 times [2020-09-25 03:30:40,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:30:40,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641692376] [2020-09-25 03:30:40,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:30:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:30:40,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:41,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:41,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:41,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:41,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:42,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:42,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:44,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:44,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:44,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:45,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:45,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:30:45,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 417 [2020-09-25 03:30:45,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 03:30:45,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-09-25 03:30:45,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:30:45,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 03:30:45,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 160 [2020-09-25 03:30:45,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 211 [2020-09-25 03:30:45,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:30:46,383 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 03:30:46,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:30:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:30:46,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:30:46,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:30:46,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 03:30:46,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:30:46,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-25 03:30:46,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:30:46,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:30:46,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:30:46,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:30:46,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:30:46,871 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 03:30:46,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641692376] [2020-09-25 03:30:46,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:30:46,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 03:30:46,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670291248] [2020-09-25 03:30:46,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 03:30:46,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:30:46,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 03:30:46,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 03:30:46,875 INFO L87 Difference]: Start difference. First operand 4084 states and 4988 transitions. Second operand 5 states.