/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 00:07:18,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:07:18,997 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:07:19,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:07:19,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:07:19,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:07:19,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:07:19,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:07:19,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:07:19,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:07:19,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:07:19,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:07:19,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:07:19,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:07:19,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:07:19,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:07:19,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:07:19,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:07:19,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:07:19,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:07:19,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:07:19,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:07:19,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:07:19,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:07:19,052 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:07:19,052 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:07:19,053 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:07:19,054 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:07:19,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:07:19,055 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 00:07:19,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 00:07:19,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 00:07:19,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 00:07:19,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 00:07:19,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 00:07:19,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 00:07:19,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 00:07:19,061 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 00:07:19,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:07:19,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:07:19,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:07:19,064 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 00:07:19,092 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:07:19,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:07:19,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:07:19,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:07:19,094 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:07:19,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:07:19,094 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:07:19,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:07:19,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:07:19,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:07:19,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:07:19,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:07:19,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:07:19,096 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:07:19,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:07:19,096 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:07:19,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:07:19,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:07:19,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:07:19,097 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:07:19,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:07:19,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:07:19,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:07:19,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:07:19,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:07:19,098 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:07:19,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:07:19,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:07:19,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:07:19,099 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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;log-additional-information=true; [2020-09-25 00:07:19,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:07:19,601 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:07:19,605 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:07:19,608 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:07:19,610 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:07:19,611 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 00:07:19,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bc605f623/27bcebe878934f97b48b24b891ad9996/FLAGa12a7c9d2 [2020-09-25 00:07:20,316 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:07:20,317 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 00:07:20,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bc605f623/27bcebe878934f97b48b24b891ad9996/FLAGa12a7c9d2 [2020-09-25 00:07:20,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bc605f623/27bcebe878934f97b48b24b891ad9996 [2020-09-25 00:07:20,546 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:07:20,552 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:07:20,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:07:20,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:07:20,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:07:20,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:07:20" (1/1) ... [2020-09-25 00:07:20,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cce1892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:07:20, skipping insertion in model container [2020-09-25 00:07:20,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:07:20" (1/1) ... [2020-09-25 00:07:20,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:07:20,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:07:21,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:07:21,296 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:07:21,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:07:21,513 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:07:21,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:07:21 WrapperNode [2020-09-25 00:07:21,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:07:21,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:07:21,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:07:21,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:07:21,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:07:21" (1/1) ... [2020-09-25 00:07:21,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:07:21" (1/1) ... [2020-09-25 00:07:21,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:07:21" (1/1) ... [2020-09-25 00:07:21,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:07:21" (1/1) ... [2020-09-25 00:07:21,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:07:21" (1/1) ... [2020-09-25 00:07:21,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:07:21" (1/1) ... [2020-09-25 00:07:21,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:07:21" (1/1) ... [2020-09-25 00:07:21,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:07:21,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:07:21,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:07:21,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:07:21,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:07:21" (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 00:07:21,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:07:21,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:07:21,714 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 00:07:21,714 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:07:21,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:07:21,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 00:07:21,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 00:07:21,715 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 00:07:21,716 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 00:07:21,716 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 00:07:21,717 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 00:07:21,717 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 00:07:21,717 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 00:07:21,717 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 00:07:21,718 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 00:07:21,719 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 00:07:21,719 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 00:07:21,719 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:07:21,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:07:21,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:07:23,362 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:07:23,363 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 00:07:23,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:07:23 BoogieIcfgContainer [2020-09-25 00:07:23,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:07:23,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:07:23,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:07:23,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:07:23,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:07:20" (1/3) ... [2020-09-25 00:07:23,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eea04d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:07:23, skipping insertion in model container [2020-09-25 00:07:23,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:07:21" (2/3) ... [2020-09-25 00:07:23,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eea04d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:07:23, skipping insertion in model container [2020-09-25 00:07:23,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:07:23" (3/3) ... [2020-09-25 00:07:23,385 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 00:07:23,398 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:07:23,410 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:07:23,433 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:07:23,468 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:07:23,468 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:07:23,468 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:07:23,468 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:07:23,468 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:07:23,469 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:07:23,469 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:07:23,469 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:07:23,507 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states. [2020-09-25 00:07:23,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 00:07:23,541 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:07:23,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:07:23,544 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:07:23,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:07:23,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1493724513, now seen corresponding path program 1 times [2020-09-25 00:07:23,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:07:23,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884959819] [2020-09-25 00:07:23,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:07:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:07:24,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:24,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:25,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:25,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:25,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:25,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:25,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:26,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:29,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:07:29,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 00:07:29,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 00:07:29,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-09-25 00:07:29,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:07:29,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 00:07:29,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-09-25 00:07:29,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-09-25 00:07:29,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 00:07:29,926 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 00:07:29,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:07:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:07:29,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:29,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:07:29,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 00:07:29,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:07:29,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-25 00:07:29,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:07:29,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:07:29,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:07:29,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:07:29,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:07:30,482 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 00:07:30,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884959819] [2020-09-25 00:07:30,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:07:30,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 00:07:30,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166815919] [2020-09-25 00:07:30,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 00:07:30,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:07:30,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 00:07:30,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 00:07:30,528 INFO L87 Difference]: Start difference. First operand 822 states. Second operand 5 states. [2020-09-25 00:07:36,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:07:36,788 INFO L93 Difference]: Finished difference Result 2052 states and 2711 transitions. [2020-09-25 00:07:36,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 00:07:36,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 418 [2020-09-25 00:07:36,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:07:36,821 INFO L225 Difference]: With dead ends: 2052 [2020-09-25 00:07:36,822 INFO L226 Difference]: Without dead ends: 1250 [2020-09-25 00:07:36,832 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 00:07:36,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2020-09-25 00:07:36,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1248. [2020-09-25 00:07:36,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1248 states. [2020-09-25 00:07:37,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1511 transitions. [2020-09-25 00:07:37,003 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1511 transitions. Word has length 418 [2020-09-25 00:07:37,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:07:37,009 INFO L479 AbstractCegarLoop]: Abstraction has 1248 states and 1511 transitions. [2020-09-25 00:07:37,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 00:07:37,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1511 transitions. [2020-09-25 00:07:37,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-09-25 00:07:37,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:07:37,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:07:37,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:07:37,029 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:07:37,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:07:37,030 INFO L82 PathProgramCache]: Analyzing trace with hash -493468435, now seen corresponding path program 1 times [2020-09-25 00:07:37,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:07:37,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547254017] [2020-09-25 00:07:37,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:07:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:07:37,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:37,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:37,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:37,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:37,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:37,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:38,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:38,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:42,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:07:42,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 426 [2020-09-25 00:07:42,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 00:07:42,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-09-25 00:07:42,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:07:42,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 00:07:42,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-09-25 00:07:42,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-25 00:07:42,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 00:07:42,717 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 00:07:42,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:07:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:07:42,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:42,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:07:42,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 00:07:42,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:07:42,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-25 00:07:42,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:07:42,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:07:42,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:07:42,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:07:42,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:07:42,991 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 00:07:42,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547254017] [2020-09-25 00:07:42,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:07:42,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 00:07:42,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758973122] [2020-09-25 00:07:42,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 00:07:42,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:07:42,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 00:07:42,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 00:07:42,996 INFO L87 Difference]: Start difference. First operand 1248 states and 1511 transitions. Second operand 5 states. [2020-09-25 00:07:48,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:07:48,108 INFO L93 Difference]: Finished difference Result 3293 states and 4039 transitions. [2020-09-25 00:07:48,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 00:07:48,109 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 419 [2020-09-25 00:07:48,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:07:48,126 INFO L225 Difference]: With dead ends: 3293 [2020-09-25 00:07:48,126 INFO L226 Difference]: Without dead ends: 2257 [2020-09-25 00:07:48,130 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 00:07:48,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2020-09-25 00:07:48,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2255. [2020-09-25 00:07:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2255 states. [2020-09-25 00:07:48,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 2745 transitions. [2020-09-25 00:07:48,280 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 2745 transitions. Word has length 419 [2020-09-25 00:07:48,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:07:48,282 INFO L479 AbstractCegarLoop]: Abstraction has 2255 states and 2745 transitions. [2020-09-25 00:07:48,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 00:07:48,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 2745 transitions. [2020-09-25 00:07:48,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-09-25 00:07:48,304 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:07:48,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:07:48,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:07:48,305 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:07:48,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:07:48,306 INFO L82 PathProgramCache]: Analyzing trace with hash 884990985, now seen corresponding path program 1 times [2020-09-25 00:07:48,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:07:48,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765982631] [2020-09-25 00:07:48,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:07:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:07:48,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:48,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:48,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:49,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:49,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:49,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:50,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:51,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:53,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:07:53,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 427 [2020-09-25 00:07:53,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 00:07:53,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-09-25 00:07:53,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:07:53,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 00:07:53,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 165 [2020-09-25 00:07:53,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-09-25 00:07:53,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:07:53,980 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 00:07:53,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:07:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:07:54,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:54,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:07:54,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 00:07:54,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:07:54,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-25 00:07:54,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:07:54,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:07:54,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:07:54,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:07:54,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:07:54,288 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 00:07:54,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765982631] [2020-09-25 00:07:54,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:07:54,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 00:07:54,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093492763] [2020-09-25 00:07:54,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 00:07:54,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:07:54,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 00:07:54,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 00:07:54,291 INFO L87 Difference]: Start difference. First operand 2255 states and 2745 transitions. Second operand 5 states. [2020-09-25 00:07:59,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:07:59,087 INFO L93 Difference]: Finished difference Result 6131 states and 7495 transitions. [2020-09-25 00:07:59,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 00:07:59,088 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 420 [2020-09-25 00:07:59,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:07:59,107 INFO L225 Difference]: With dead ends: 6131 [2020-09-25 00:07:59,107 INFO L226 Difference]: Without dead ends: 4153 [2020-09-25 00:07:59,112 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 00:07:59,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4153 states. [2020-09-25 00:07:59,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4153 to 4151. [2020-09-25 00:07:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4151 states. [2020-09-25 00:07:59,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4151 states to 4151 states and 5043 transitions. [2020-09-25 00:07:59,301 INFO L78 Accepts]: Start accepts. Automaton has 4151 states and 5043 transitions. Word has length 420 [2020-09-25 00:07:59,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:07:59,302 INFO L479 AbstractCegarLoop]: Abstraction has 4151 states and 5043 transitions. [2020-09-25 00:07:59,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 00:07:59,302 INFO L276 IsEmpty]: Start isEmpty. Operand 4151 states and 5043 transitions. [2020-09-25 00:07:59,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2020-09-25 00:07:59,316 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:07:59,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:07:59,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 00:07:59,317 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:07:59,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:07:59,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1664873111, now seen corresponding path program 1 times [2020-09-25 00:07:59,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:07:59,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366552627] [2020-09-25 00:07:59,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:07:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:07:59,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:59,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:59,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:59,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:00,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:00,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:01,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:02,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:04,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:08:04,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 428 [2020-09-25 00:08:04,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 00:08:04,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-09-25 00:08:04,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:08:04,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 00:08:04,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 167 [2020-09-25 00:08:04,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-25 00:08:04,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:08:04,908 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 00:08:04,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:08:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:08:04,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:04,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:08:04,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 00:08:04,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:08:04,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 00:08:04,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:08:04,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:08:04,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:08:04,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:08:04,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:08:05,139 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 00:08:05,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366552627] [2020-09-25 00:08:05,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:08:05,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 00:08:05,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016927443] [2020-09-25 00:08:05,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 00:08:05,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:08:05,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 00:08:05,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 00:08:05,142 INFO L87 Difference]: Start difference. First operand 4151 states and 5043 transitions. Second operand 5 states.