/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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:46:12,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:46:12,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:46:12,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:46:12,249 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:46:12,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:46:12,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:46:12,254 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:46:12,256 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:46:12,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:46:12,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:46:12,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:46:12,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:46:12,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:46:12,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:46:12,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:46:12,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:46:12,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:46:12,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:46:12,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:46:12,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:46:12,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:46:12,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:46:12,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:46:12,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:46:12,277 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:46:12,277 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:46:12,278 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:46:12,278 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:46:12,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:46:12,280 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:46:12,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:46:12,282 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:46:12,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:46:12,284 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:46:12,284 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:46:12,285 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:46:12,285 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:46:12,285 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:46:12,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:46:12,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:46:12,288 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 [2020-09-24 20:46:12,334 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:46:12,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:46:12,336 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:46:12,336 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:46:12,336 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:46:12,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:46:12,337 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:46:12,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:46:12,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:46:12,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:46:12,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:46:12,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:46:12,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:46:12,340 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:46:12,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:46:12,341 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:46:12,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:46:12,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:46:12,341 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:46:12,342 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:46:12,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:46:12,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:46:12,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:46:12,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:46:12,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:46:12,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:46:12,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:46:12,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:46:12,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:46:12,344 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true; [2020-09-24 20:46:12,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:46:12,815 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:46:12,819 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:46:12,821 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:46:12,822 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:46:12,823 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-09-24 20:46:12,912 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e4e1fddef/5489268c14ff4a5081fd40fceb603879/FLAG5e5263026 [2020-09-24 20:46:13,755 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:46:13,756 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-09-24 20:46:13,795 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e4e1fddef/5489268c14ff4a5081fd40fceb603879/FLAG5e5263026 [2020-09-24 20:46:13,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e4e1fddef/5489268c14ff4a5081fd40fceb603879 [2020-09-24 20:46:13,864 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:46:13,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:46:13,874 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:46:13,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:46:13,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:46:13,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:46:13" (1/1) ... [2020-09-24 20:46:13,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24f6f65c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:46:13, skipping insertion in model container [2020-09-24 20:46:13,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:46:13" (1/1) ... [2020-09-24 20:46:13,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:46:14,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:46:15,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:46:15,823 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:46:17,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:46:17,057 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:46:17,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:46:17 WrapperNode [2020-09-24 20:46:17,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:46:17,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:46:17,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:46:17,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:46:17,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:46:17" (1/1) ... [2020-09-24 20:46:17,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:46:17" (1/1) ... [2020-09-24 20:46:17,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:46:17" (1/1) ... [2020-09-24 20:46:17,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:46:17" (1/1) ... [2020-09-24 20:46:17,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:46:17" (1/1) ... [2020-09-24 20:46:17,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:46:17" (1/1) ... [2020-09-24 20:46:17,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:46:17" (1/1) ... [2020-09-24 20:46:17,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:46:17,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:46:17,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:46:17,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:46:17,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:46:17" (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 [2020-09-24 20:46:17,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:46:17,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:46:17,387 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 20:46:17,388 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:46:17,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:46:17,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 20:46:17,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 20:46:17,390 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 20:46:17,391 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 20:46:17,391 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 20:46:17,391 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 20:46:17,391 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 20:46:17,392 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 20:46:17,392 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 20:46:17,392 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 20:46:17,393 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-24 20:46:17,393 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-09-24 20:46:17,394 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 20:46:17,394 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 20:46:17,394 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:46:17,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:46:17,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:46:22,874 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:46:22,875 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 20:46:22,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:46:22 BoogieIcfgContainer [2020-09-24 20:46:22,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:46:22,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:46:22,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:46:22,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:46:22,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:46:13" (1/3) ... [2020-09-24 20:46:22,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b85730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:46:22, skipping insertion in model container [2020-09-24 20:46:22,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:46:17" (2/3) ... [2020-09-24 20:46:22,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b85730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:46:22, skipping insertion in model container [2020-09-24 20:46:22,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:46:22" (3/3) ... [2020-09-24 20:46:22,923 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-09-24 20:46:22,938 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:46:22,957 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-09-24 20:46:22,983 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-24 20:46:23,031 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:46:23,031 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:46:23,031 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:46:23,031 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:46:23,032 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:46:23,032 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:46:23,032 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:46:23,032 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:46:23,109 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states. [2020-09-24 20:46:23,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1428 [2020-09-24 20:46:23,231 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:46:23,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:46:23,235 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:46:23,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:46:23,246 INFO L82 PathProgramCache]: Analyzing trace with hash -283699444, now seen corresponding path program 1 times [2020-09-24 20:46:23,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:46:23,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096978582] [2020-09-24 20:46:23,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:46:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:46:27,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:29,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:30,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:31,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:46:31,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1434 [2020-09-24 20:46:31,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:46:31,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5178 [2020-09-24 20:46:31,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:46:31,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:46:31,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 444 [2020-09-24 20:46:31,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 316 [2020-09-24 20:46:31,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:46:33,261 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-09-24 20:46:33,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:46:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:46:33,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:33,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:46:33,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-09-24 20:46:33,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:46:33,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-09-24 20:46:33,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:46:33,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:46:33,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:46:33,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:46:33,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:46:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:46:35,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096978582] [2020-09-24 20:46:35,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:46:35,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:46:35,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693736620] [2020-09-24 20:46:35,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:46:35,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:46:35,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:46:35,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:46:35,114 INFO L87 Difference]: Start difference. First operand 3644 states. Second operand 5 states. [2020-09-24 20:47:10,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:47:10,821 INFO L93 Difference]: Finished difference Result 9869 states and 13388 transitions. [2020-09-24 20:47:10,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 20:47:10,824 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1427 [2020-09-24 20:47:10,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:47:10,889 INFO L225 Difference]: With dead ends: 9869 [2020-09-24 20:47:10,889 INFO L226 Difference]: Without dead ends: 6294 [2020-09-24 20:47:10,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:47:10,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6294 states. [2020-09-24 20:47:11,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6294 to 6150. [2020-09-24 20:47:11,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6150 states. [2020-09-24 20:47:11,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6150 states to 6150 states and 8022 transitions. [2020-09-24 20:47:11,222 INFO L78 Accepts]: Start accepts. Automaton has 6150 states and 8022 transitions. Word has length 1427 [2020-09-24 20:47:11,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:47:11,225 INFO L479 AbstractCegarLoop]: Abstraction has 6150 states and 8022 transitions. [2020-09-24 20:47:11,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:47:11,226 INFO L276 IsEmpty]: Start isEmpty. Operand 6150 states and 8022 transitions.